Technical specifications and general conditions for street lighting in Saudi Arabia 

Introduction

In the interest of the Ministry’s Agency for Technical Affairs to keep pace with developments with regard to the implementation of various municipal projects in accordance with the comprehensive development plan.In view of the responsibilities undertaken by this agency in raising the level of performance for works of technical nature and for Lighting projects were among the work entrusted to this agency, including street lighting. The importance of updating and developing its technical specifications emerged due to their relationship to the safety and security of the road and the comfort and safety of its users and to be unified for all branches of the Ministry to adhere to when implementing their projects.So this was undertaken. The agency prepares technical specifications and general conditions for street and road lighting projects in accordance with the latest scientific foundations and in accordance with the developments that have occurred in locally manufactured materials, which have reached a high level in technology and production and have become competitive with their counterparts manufactured externally.This study included On the types of materials and equipment required to be supplied for the project, such as columns of various types, including polygonal, round and graduated, and their heights, mercury and sodium lighting lanterns and their different capacities, cables, electrical panels and transformers, and highlighting the characteristics of each of them. It also included the most appropriate methods for installing these materials and how to select and determine the suitability of the supplied materials and the works that were carried out.And to spread the benefit, these specifications contained the most important conditions and regulatory procedures for implementing these projects, in addition to the maintenance work for the project during the period A guarantee to raise the level of performance and implementation of lighting projects in municipalities. I hope that these specifications will achieve the desired goals and will be of assistance to fellow engineers. God is the success,,,

introduction

These specifications include the materials used in street lighting projects, mentioning their characteristics and methods of installation, and the regulatory procedures for contracting with contractors to implement these projects, and the resulting financial matters, guarantees, and specifications of the operation and maintenance process according to the following:

First:- Specifications of materials and equipment needed for the project that are required to be supplied by contractors and whose quantities are specified in the tables of quantities.

Second:-Methods of installing these materials according to technical principles.

Third:- General conditions, maintenance and operation of the project during the warranty year 

Chapter One: Materials and Equipment

1 Lighting poles 

Lighting poles are designed to have consistent, flowing shapes that add aesthetic aspects when installed in public streets. These poles are classified according to the manufacturing method as follows:-

• Columns of multiple diameters. 
• Conical columns. 
• Columns with special specifications. 
• Lighting towers. 

1/1/1 Shapes of columns: Lighting columns can be divided in terms of general shape into the following main sections:-

• A lighting pole without an arm – Figure No. (1). 
• One-arm lighting pole – Figure No. (2). 
• A lighting pole with two arms – Figure No. (3). 
• Special lighting poles according to the type of purpose and design required. 

1/1/2 Materials of manufacture: Columns shall be made of multi-diameter iron pipes or weldable iron plates, and shall have the characteristics shown in the following table:-

Table No. (1)

Where L: the measurement length of the sample (mm), m: the cross-sectional area of ​​the sample (mm2). 

The Ministry has the right to conduct a technical test in one of the laboratories it chooses to ensure the quality of the iron and its tolerance to the aforementioned stresses. Exceeding these numbers can be accepted within the limits of ±5%, and if it is less than that, the columns will be rejected as violating the specifications.

1/1/3 Multi-diameter columns: They consist of several parts of iron pipes of different and graduated diameters, welded together with good electric welding. Figure No. (3).

• Column pipes: The pipes must be new, free of apparent surface defects, and both ends of the tube must be cleanly cut and perpendicular to the axis, and must not have a plumbing problem. The dimensions of the pipes used in making columns shall be according to the following table: 
  
  

Table No. (2)
 

The permissible tolerances in pipes are as follows:

• Fish: +20% or -10%. 
• Weight: ± 10% for one tube, ± 5% for a batch of tubes weighing not less than 10,000 kg. 
• Straightness: ± 0.2% of the tube length. 
• Length: ± 10 mm. 
• Inner diameter non-roundness: ± 1%. 

• Standard dimensions of columns:Multi-diameter columns can be divided into two basic types according to the method of installation:A – Columns planted in the ground at a suitable depth. Table No. (3). Figure No. (3).B- Columns fixed with nails (screws). Table No. (4). Figure No. (4). 
  
  
  

Table No. (3)Dimensions of multi-diameter embedded columns
 

* These dimensions are indicative and vary depending on the arm length required in the table of quantities – see Figure No. (3)

Table No. (4): Dimensions of columns installed with multi-diameter screws

*These dimensions are indicative and vary depending on the arm length required in the table of quantities. – See Figure No. (4). 

* comments :

• The depth of overlap between two pipes in the column must not be less than 150 mm. 
• Reinforcement supports must be welded in the gap between two successive tubes. These supports must ensure a uniform distribution of the static and dynamic loads affecting the column and reduce their impact on the welding between the two tubes. 

1/1/4 Conical columns:They are iron columns, either polygonal or circular, as in Figures No. (5) and (6).And its detailed dimensions are as shown in Tables No. (5) and (6) 

In addition to the requirements stipulated in the aforementioned tables, the following must be taken into account:

• The arm height should not exceed 2.30 metres. 
• The arm projection shall not exceed 25% of the nominal length of the column. 
• The planting depth should not exceed 15% of the installation height of the column. 

As for conical columns, they must fulfill the following in addition to the above:

• The column body must be cold formed from one piece and then welded longitudinally. 
• For columns whose height exceeds 12 meters, they can be made of two overlapping parts and have a sliding connection, and their overlap should not be less than 50 cm, and then they are connected to each other by pressure or with headless screws. 
• The column must not contain any transverse welding. 

-Welding:

• The welding must be done using one of the appropriate fusion welding methods. 
• All welds must be homogeneous, with a smooth and regular contour, fully integrated, and free of apparent surface defects. 
• The welds must withstand the stresses to which the column is exposed. 

– Arm:

• The arm is installed in the column body in a way that ensures that it is fixed in the correct position and that it is resistant to torque, lateral vibration, and detachment from the column body. 
• An iron tubular connection is welded to the top of the pole or the end of the arm with a diameter suitable for fixing the lantern, depending on the type of lantern. 
• The inclination angle of the lantern ranges between 0, 5, 10, or 15 degrees. 

– Fuse box opening and door:The column must contain an opening to allow the insertion, connection and maintenance of the control group, connections and power-off fuses. Their dimensions are compatible with the dimensions of the column and must be welded inside the column and facing the door opening. A metal holder on which to attach the fuse box. It has a door that is resistant to weather conditions and is airtight. It has the same roundness as the column, and it must be compatible with the opening so that after its installation it is level with the surface of the column. It is locked with a special key (triangular, for example) so that it is difficult to open it for anyone other than specialists. It is attached to the body of the column from the inside and near the door opening. A stainless metal grounding bolt with a diameter of not less than 12 mm and equipped with a nut and metal washers (rosters) to connect the ground wire to it. The door is also attached to the column body by a galvanized chain or hinges.

– Permissible tolerances on column dimensions:

• Straightness: The axis of the column body must not deviate from the straight line by 0.03% of its length. 
• Total length of column without arm ±5%. 
• Total length of column without arm ± 1%. 
• Arm drop ± 2%. 
• Diameters are ± 1.5% of the specified diameter (this does not apply to welded ends or slots). 
• Fish +20% to -10%. 
• Weight ± 5% of the specified column weight. 

1/1/5 Columns with special specifications:

They are columns of different heights and sizes, designed according to the purpose.

Table No. (5) Dimensions of polygonal conical columns 

The height of the column above the ground	Column diameter		Fuse box slot			Thickness of column steel	Mounting base			Mounting screws
lm	q 1mm	S2 mm	amm	bmm	cmm	Th 1Mm	kmm	imm	s2mm	s3 x l mmm	the number
3	102	60	80	300	600	3	250	200	10	18×400	4
4	156
5	156	60	100	400			350	250	10	24×500
6
7	190	60	140	400		4	400	300	15	24×500
8
9	190	60	140	500			400	300	15	24×700
10	210	100
12	250	100	140	500			400	300	20	27×900
14	285	110					500	400	20
15	300	120	150	500			600	500	25	30×1000
16	320					5/4

Note: – The dimensions for column heights and thicknesses are basic numbers.The rest of the dimensions are indicative and their final value is determined on the plan during design if there is a discrepancy. .

1/1/6 Lighting towers:\

• Tower manufacturing: 

Lighting towers shall be made of hot galvanized iron from the inside and outside, and shall have circular or polygonal sections in the form No. (7) and (8) and at a height above the ground according to Table No. (7), and shall be designed to carry a number of ( 4-12) A searchlight or lantern according to the required design and suitable for use in lighting highways, public squares and squares.The tower consists of several links, with the length of the first lower link not less than 10 metres. The links are assembled on site by inserting an end. The lower link is at the beginning of the upper link by pressure or using sliding links whose length is not less than 1.5 diameter of the link. Welding is not permitted on site, and the thickness of the tower’s steel must not be less than what is mentioned in Table No. (7). A fixing base made of non-galvanized iron is welded to the bottom of the tower. Made of chips to withstand the full stress at the base of the tower, the base is also provided with reinforcement fins between the screw holes.The tower is provided with a door with appropriate dimensions to access the internal distribution panel that includes the main breaker and sub-breakers, as well as the end box of the electric hoist. The tower’s distribution panel is made of iron or any material that is not affected by weather factors, and the door is fixed with invisible hinges and has a tight lock. With appropriate strengthening of the door.A galvanized iron nail is welded inside the tower next to the door opening and is provided with a metal ring and nuts of the same type to connect the grounding wire.



  

• Lantern or flashlight holder: 

It is made of hot galvanized iron corners and can accommodate the required number of lanterns and the necessary mounting supports. It consists of two parts connected together by screws that can be easily removed from the tower. The stand is designed to allow light to be distributed in any direction. It is also provided with rollers made of moisture-resistant metal to maintain its balance during ascents and descents. It rests on supports with self-lubricating bronze bushings, Figure No. (9). 

The stand is provided with an electrical equipment box that is resistant to weather factors and is equipped with a base for connecting suitable terminals, a tie rod, and a grounding screw. It is also provided with an electrical outlet for the possibility of testing lanterns when the stand is at the bottom of the tower. The connection cables between the termination box at the bottom of the tower and the equipment box on the stand are of the flexible type that includes several insulated conductors with High heat resistance, with a cross section of no less than 2.5 mm2, and in the colors specified in the bulletin of the Saudi Arabian Organization for Standardization and Metrology. The connections to the equipment box located in the lantern holder at the factory are made in a good way and are made of copper insulated with neoprene, multi-layer polyethylene, or any similar insulation.

• Lifting and lowering device: 

The upper head frame is made of hot galvanized iron and is attached to the tower with sliding anchors secured by four galvanized iron nails and covered with a layer of aluminum or any other weather-resistant material. All metal rope reels and everything necessary to operate the lantern holder are also covered. The pulleys are made of a stainless material with a cavity suitable for the diameter of the metal rope and have a self-lubricating seat that rotates on a steel axis and are placed at the necessary incline. It also ensures the pivot of the rope in all directions as in Figure No. (10) so that the rope does not emerge from the pulley cavity. Necessary precautions are taken to separate electrical cables from metal ropes before they pass over their pulleys. The paths designated for the cables ensure that the movement of the pulleys is not obstructed during operation, and this can be done by means of cable rails during raising and lowering. 

The flashlight holder is attached by a braided, flexible, stainless metal rope. The safety factor shall be equal to five times the load of one rope of the crane. The end of the power cable is provided with a number of sockets (outlets) and multi-pole plugs with a protective ring for use in the termination box at the base. It is connected on the other side to the termination box attached to the flashlight holder for use when conducting tests. An anti-rollback device is installed on the head frame to secure the flashlight holder from falling, and it works to It is installed automatically when the suspension rope breaks, and it can be operated automatically via a visible effect from the bottom of the tower. It is also provided with a mounting system for the holder to prevent it from rotating around the axis of the tower and the head.The flashlight holder is raised and lowered using a crane designed for use from the door of the tower. This crane is operated manually or with electrical equipment, with the possibility of reversing the direction of its rotation movement with a means To adjust the torque to a certain limit and secure it. It can be operated from a distance of five metres. It is inside a completely sealed and self-lubricating box. As for the metal rope pulley, it must allow the metal rope to be wound uniformly. The crane is designed to double the weight of the flashlight holder and its accessories, in addition to the influence of the wind during its operation. It is fed by a breaker with protection against overload to stop the flashlight holder in the event that the tension force exceeds the specified limit. It is also provided with a suitable means to allow it to be stopped in a safe manner.

• Tower power distribution panel: 

The tower’s power distribution board consists of a group of breakers inside a box made of stainless metal plates with the cover mounted on an insulating board behind the tower door.Unless otherwise stated, this box contains As follows : 

• Nine single branch breakers with 10 amp thermal protection for luminaires with tie line assembly. 
• Triple automatic breaker with 60 amp thermal protection for the main supply line. 
• A triple outlet (13-16) amps is installed with the main breaker group from the entry side to operate the lift hand.The entry ends of the main breaker (60 amp capacity) must allow the connection of two cables. The section of each is 35 mm2. 
  
• The connection box installed with the lantern holder: It is made of molded metal with the cover, provided that it is resistant to weather factors and includes:• Inlets for cables and a base for connecting ends assembled together according to the required connection to the box and made of Chinese And suitable for the weather conditions surrounding the site.• A rotatable multi-outlet socket with the necessary flexible tube and plug, which is installed in a way that allows the connection of a multi-conductor cable (wires).
  
  
    

• Painting columns and towers: 

A – Non-galvanized:The column and its parts must be protected from rust and other weather factors by cleaning all surfaces internally and externally well in an appropriate manner and removing any grease, rust or any other materials before Paint. The column will be coated internally and externally with a base layer of rust-preventing material such as (red lead dioxide), except for the part that will be planted in the ground, which will be coated internally and externally with a layer of bitumen (black bitumen). Then it is painted with a layer of oil paint (metallic silver color or any color chosen by the Ministry) after a period of no less than two weeks, then the column is painted with another layer of the same paint after a week.

B- Galvanized:The column is immersed in a basin of molten zinc to cover the column internally and externally with a layer of zinc, then the part that is planted under the surface of the ground is coated with a layer of (black bitumen). The paint layer must be homogeneous, regular, smooth, have good adhesion to the surface and cover it, and be free of apparent surface defects.

  

Table No. (7) Lighting towers 

where : 

L: The length of the tower M3: The diameter of the anchor boltS1: The diameter of the tower at the base W2: The thickness of the anchor baseS2: The diameter of the tower at the top A : Width of the door opening (fuses and lever)z : Side of the mounting base B : Length of the door opening (fuses and lever)f1 : The distance of one nail from the edge of the mounting base C- Height of the fuse box door openingf2: The distance between each two adjacent bolts and the lever above the groundlm: Length of the mounting bolt W1: Thickness of the tower steel< /span>

Note:The dimensions for the height and thickness of the towers are basic, while the rest of the dimensions are indicative.

2 lanterns:

The lanterns are supplied complete with operating devices and bulbs in addition to the photocell if the lanterns required in the tables of quantities operate with the photocell, and they are of several types as follows:

• Street lighting lanterns. 
• Lanterns (spotlights) to illuminate courtyards and squares. 
• Lanterns (flashlights) to illuminate tunnels and under bridges. 
• Garden lighting lanterns. 

1/2/1 Street lighting lanterns:

It is either the type that mounts on the arm of the pole or directly on top of it.

• Lantern body:The lantern body must be of a shape and size suitable for the purpose it will serve. It contains the necessary operating devices inside it. It is made of rust-resistant, non-corrosive materials. It is lightweight and can withstand shocks and extremes. The temperature reached by the lantern during normal use, and it is equipped with a felt or rubber gasket to prevent the leakage of water, dust, and small insects. The body of the lantern is provided with a Chinese connection base of a suitable size for the connectors. The entrance of the connectors to the lantern is equipped with clamps to stabilize the connectors to prevent them from slipping, provided that they are technically designed so as not to damage the insulation of the connectors and to prevent any tension or pressure on the connection inside the lantern. All lantern fixings to the pole shall be galvanized or stainless steel. 
  
• Light-diffusing cover:The lantern is provided with a light-diffusing cover made of prismatic glass or polycarbonate, which has been specially treated in accordance with international specifications in order to withstand shocks and the effect of heat and not change color in the long term due to exposure. For sunlight, the surface of the cover must be in a way that prevents dust from accumulating on it, and the cover must be closed completely tightly. It is also attached to the lantern using hinges and hooks, so that the cover remains attached to the hinges if the hooks are removed, so that the inside of the lantern can be accessed for maintenance purposes. 
  
• Reflector:The reflector shall be made of highly purified treated aluminum with a high degree of luster and is not resistant to rust or corrosion in the long term. It shall be mounted on the body of the lantern in such a way that it can be configured precisely according to the distribution. What is needed for the light to get the most out of the light produced by the bulb. It is also permissible to use reflectors coated with special paints that increase the intensity of light reflection, provided that this is stipulated in the schedule of quantities. 
  
• Lamp base:The lamp base must be made of good white china (Porcelain), provided that it is suitable for installing sodium vapor or mercury vapor bulbs on it, and is suitable for the size of the bulb and movable to give the best effect. The best distribution of light depends on the type of street and design, and to keep the bulb in its correct position and keep it firmly attached.The base of the bulb is provided with heat-resistant insulated connectors and is connected to the contact terminals on the body of the lantern so that these connectors can withstand the extreme temperatures that it reaches. The lantern is in operation. 
  
  
• Bulbs:The lantern is equipped with sodium or mercury vapor bulbs or any other types of bulbs. The type and capacity of the bulb are specified in the quantity tables. These bulbs are made of heat-resistant solid glass of the tempered type. (Screw), manufactured and tested in accordance with Saudi standard specifications or their equivalent.The contractor must provide the following technical information about the bulbs: 
  
  
  • Bulb catalog with full specifications and manufacturer name. 
  • Lamp consumption in watts for normal voltage conditions. 
  • Ignition start voltage and current. 
  • The life of the lamp in hours until its luminance reaches 80% of its nominal luminance. 
  • A graph of the decline in the intensity of a lamp’s illumination with time. 
  • The luminous flux of the bulb after 100 hours of operation (in lumens). 
  • The total life of the lamp is estimated in hours. 
  • The power factor of the lamp after it is equipped with a choke coil and a condenser. 
  • Capacity of the capacitor to be used with the bulb to improve the power factor (in microfarads). 
• Ballast:Throttle coils are suitable for working with mercury vapor or sodium vapor bulbs, depending on the type and capacity of the bulb used in the lantern. They are designed to work according to the climatic conditions of the Kingdom and are resistant to moisture leakage and can withstand heat. It does not emit any sound vibrations when operating, and it is of the type protected within a metal box.The coil is of the graduated type to adjust the voltage drop on the bulb. It is preferable that the gradient be 200/210/220/230/240 volts and that These coils, along with the rest of their parts, shall be of a quality that is installed inside the lantern, and shall be equipped with connectors and screws. The coils themselves shall contain information regarding voltage, power, frequency, and power factor. The contractor must provide catalogs that explain the technical characteristics of these files and include the following: 
  
  
  • General description of the file and name of the manufacturer. 
  • Connection diagram and installation method. 
  • The type of insulating material must be of a type compatible with hot, humid areas. 
  • Experimental voltage and insulation voltage of the coil. 
• Condenser:Capacitors are suitable for working with mercury vapor lamps or sodium vapor lamps and operate under a voltage of 200 – 230 volts and a frequency of 60 oscillations/second, or according to the system of the local electricity company, and they can withstand harsh conditions. Local operation is highly efficient, raising the power factor to no less than 0.95. 
  
• The torch:The torch is suitable for working with bulbs whose capacity is specified in the quantity tables and is well insulated against moisture and water.It works under a voltage ranging between 200 – 300 volts. And a frequency of 60 oscillations/second, or according to the local electricity company’s system. 
  
  
• Internal feeding cables and connectors: 

A – Connection cables from the fuse box to the lantern.

They are insulated copper conductors that can withstand a voltage of 600 volts, with a cross-section of no less than 2.5 mm2, and are inside a plastic casing composed of two or more conductors depending on the number of lanterns and their capacity, in addition to the grounding conductor. Its price is based on the price of the lantern.B- The feeding connectors inside the lantern:

They are copper conductors insulated with an insulating material of silicon or any other heat-resistant material, such that the insulation is able to withstand temperatures up to 120 degrees Celsius and withstand an ignition initiation voltage of approximately 4 kilovolts for pressure sodium vapor lamps.

1/2/2 Floodlights for lighting courtyards and squares:

It must be suitable for installing high-pressure sodium vapor lamps, tubular metal halide lamps, or any other types that operate at a voltage of 220 volts and a frequency of 60 oscillations/second, or according to the system of the local electricity company. The type and capacity of the bulb shall be according to the quantity tables.

• The flashlight body: It is made of pressed aluminum sheets, painted with oven-heated paint, and equipped with a silicone-reinforced rubber gasket to prevent water and dust from leaking into the flashlight. 
• Cover: made of thermal glass. 
• Electrical operating devices: They are equipped in a separate box or within the flashlight. 
• The torch: It is insulated against water and installed in the flashlight’s body from the outside. 
• Lighting system: reflectors on the sides and top made of high-purity aluminum. 
• Lamp holder: made of porcelain and can be moved horizontally to obtain a suitable position for the lamp. 
• Installing the spotlight: The spotlight is installed so that it can be moved vertically and horizontally using the mounting lever. 

1/2/3 Lanterns for lighting tunnels and under bridges:

It is suitable for using fluorescent or sodium vapor lamps, and operates at a voltage of 220 V and a frequency of 60 oscillations/second, or according to the system of the local electricity company.

• The body of the lantern: It is made of formed aluminum sheets that are resistant to external weather factors and have mechanical durability to withstand shocks and heat. It contains the necessary operating devices inside it. 
• The light-diffusing cover: It must be made of tough, heat-resistant, mechanically durable, interchangeable hardened glass, and is attached to the lantern body by means of a rubber frame to prevent water or dust leakage. It must be easy to dismantle and install and be equipped with a means that makes it suspended from the lantern body when dismantled for maintenance purposes. 
• Ballast coil: It is waterproof, non-corrosive, and is installed inside the lantern body. 
• Reflector: It is a reflective mirror made of polished, shiny and treated aluminum. 
• Installing the lantern: It must be able to be installed on walls or ceilings and equipped with the necessary means of fixing such as screws and nuts. 

1/2/4 Garden lighting lanterns:

It is suitable for using incandescent, mercury vapor, or sodium vapor bulbs, with or without operating devices, depending on the type of bulb and its capacity. The shape of the lantern is determined according to what is stated in the table of quantities and drawings.The general shape of the lantern has an aesthetic appearance, and is resistant to the entry of dirt, dust, and water.

• The light-diffusing cover: It can be either spherical, conical, or any other shape, made of heat- and shock-resistant polycarbonate, with a fixed color that does not change with time, and securely attached to the body of the lantern. It is easy to disassemble and install to facilitate the maintenance process. 
• The base for attaching the lantern to the pole: made of aluminum alloy painted with oven-heated paint. 
• The lamp base: It must be made of white china (Porcelain) and is suitable for the size, capacity and type of the lamp. The lantern is vertically attached to the pole using galvanized iron screws. 

* comments : 

The contractor must provide catalogs and technical information about the lantern, provided that they contain the following:

A – The name of the manufacturer and the specific model number, indicated with a distinctive mark in the catalogue.B – The general description of the lantern in terms of shape, weight, dimensions, method of installation and maintenance.C- Graphical curves for each of the following:

• Distribution of lighting in both the longitudinal and transverse directions at the level of the road surface, and the usage factor for the lantern in both the longitudinal direction of the street and the sidewalk in relation to the height of the lantern. 
• The intensity of illumination across the street in relation to the height of the lantern. 
• Polar curve of the lantern. 

D – The total consumed power of the lamp and operating devices (in watts).E – Dimensions of the lantern, its weight, and the area exposed to the wind.

3 Fuse boxes and connecting cables:

Fuse boxes and cable connections are used to make the connection between the incoming and outgoing cables to and from the pole and to connect the conductors leading to the lantern through protection fuses appropriate to the capacity of the lantern.The boxes are made of die-cast aluminum metal. Or made of hard plastic that is resistant to heat and mechanical shocks, provided that the box has the following specifications:

A – The size of the box should be suitable for installation within the hole designated for it in the column, and the size of the clamps should be appropriate for the cable sections used.B – The box should be equipped with suitable end clamps to connect the ends of the incoming and outgoing cables so that they can Connecting cables up to a section of 35 mm2. These clips shall be made of specially treated copper.C- The box shall be equipped with clips to stabilize the cable and prevent it from slipping. These clips must be designed so as not to damage the cable insulation or affect it. d – The box is provided with an opening for entry and exit of connection cables with plugs made of bakelite, rubber or plastic.e – The box contains fuses of suitable capacity of the screw type with a base of White china, or hard plastic on the phase line, while the neutral one is connected directly.And – The box has a tight cover that prevents moisture and dust from entering it.

4 Electrical cables:

Underground street lighting electrical cables (NYY or XLPE) with insulation voltage (600/1000) volts must be made of multi-wire stranded pure copper, flexible, well conductive and withstand a continuous temperature of 70 degrees At least Celsius, containing four conductors (cores) of equal cross-section, and each conductor is insulated from the other with flexible polyvinyl chloride (PVC) plastic, with different colors from each other to easily distinguish the three phases and the tie line, and all conductors are inside a polyvinyl chloride (PVC) plastic casing. (PVC) is flexible and conforms to Saudi standard specifications or equivalent international standards.As for cable sections and quantities, they are according to the schedules of quantities.The contractor must provide (catalogues) Technical specifications for cables, which must include detailed specifications as follows: –

• Detailed specifications or the name of the international standard according to which these cables were manufactured (with a copy of these specifications if possible). 
• Statement of nominal and verbal syllables. 
• The type of insulating material requested and its thickness. 
• Resistance of copper conductors in ohms – linear kilometers. 
• Insulation resistance in megaohms. 
• Nominal voltage and insulation voltage. 
• Weight of copper per linear kilometre. 
• Total cable weight per linear kilometre. 
• Name of the manufacturer. 

* Note:The contractor must provide test certificates for the cables. The Ministry has the right to conduct tests on samples of cables at one of the qualified laboratories to ensure their quality and compliance with the specifications. If any violation of the specifications is found, the Ministry has the right to reject the violating cables, or to fine the contractor. In the event that the weight of copper specified in the contractor’s offer is less than the weights specified in the Saudi standard specifications for the same cable sections, the contractor will be fined a percentage of the cable prices on the basis that the value of the copper is equivalent to 60% of the value of the cables, provided that the decrease in weight does not exceed 10% of the required weight.

5 pipes:

The pipes are made of tough polyvinyl chloride (PVC) plastic, resistant to soil corrosion, salts, and humidity, and resistant to mechanical factors and various pressures, as these pipes will be buried under the surface of the ground at a depth of 70 cm. Their thickness must be equal in all directions, and it is not permitted to exceed a thickness of more than 5%. They must have an outer diameter of four inches and a thickness of no less than 3 mm, or a diameter of three inches and a thickness of no less than 2.2 mm. The pipes must be provided with all means of connecting and connecting them to each other, and they must be painted. Each end must be sealed with an adhesive when connected.It is supplied in the form of straight pieces of no less than six meters in length, without any bends, holes in them, or breaks in their ends, and their inner surface must be smooth and without protrusions so as not to be damaged. Or affect the insulation of the cables.One end of the tube must be wide enough to enable the next tube to be inserted when installed by compacting, without leaving any space between the two tubes.The contractor must provide the specifications. The mechanical properties of the presented pipes include a statement of the breaking potential in kilograms per linear meter, as well as the radiation potential in kilograms per linear meter, and presenting the chemical properties.

6 Distribution panels and control devices:

• general : 

The distribution panel shall be made of sheet iron with a thickness of not less than 1.5 mm, in the form of a cabinet with two doors. Reinforcements and beams shall be made for it so that it is durable and resistant to shocks.The panel contains an internal door with hinges that only appear from it. Operating levers for control, protection, and measuring devices, in addition to the outer door, which has a suitable lock to close the door tightly and strongly.The panel is painted, after cleaning it well, with a layer of primer and then with two layers of oven paint in gray or the color Chosen by the Ministry.The panel shall be manufactured so that it is suitable for installation in the outdoor atmosphere, protection degree (IP54). It is equipped with ventilation holes with a fine mesh that prevents insects and rodents from entering.

• Painting dimensions: 

It must be suitable for the size of the internal equipment within the following sizes:

• Height: 150 cm. 
• Width: 120 cm 
• Depth: 35-40 cm. 

• Painting equipment: 

The panel is designed and manufactured on the basis that it can withstand an electrical current of up to 400 amps, and that its insulation level must not be less than 600 volts AC as a minimum, Figure No. (13). It contains the following equipment that is valid for operation at a frequency of 60 vibrations per second or according to the local electricity company’s system.

A – Three-phase thermal magnetic automatic breaker with a nominal voltage of 600 volts and a capacity of 300 amperes, of the molded case type, adjustable from (200-300) amperes, with an Interrupture Capacity of no less than 25 kA. . At 380 volts and designed for an ambient temperature of not less than 50 degrees Celsius, it is connected to the main distribution rods by copper rods with a section of not less than 200 mm2.B- A set of main distribution rods. There are four of them made of pure red copper, with a section of no less than (40 x 5) mm2. They are fixed on the necessary mounting insulators, leaving a space between them of no less than 5 cm. In addition to the grounding rod connected to the panel structure in the same section, the main rods are painted in three colors (red – yellow – blue) for easy distinction of phases.C – Two automatic contactors, each with a capacity of 200 amps, voltage 400/ 231 volts with an operating coil that operates at a voltage of 220 V and can withstand any possible changes in voltage and frequency without leading to damage, and is designed for an ambient temperature of not less than 50 degrees Celsius. One of these two automatic conductors controls the lighting of a section of the columns at the beginning of the night, and the second conductor controls By illuminating a section of the columns throughout the night. The connection from the main distribution rods to each automatic conductor is made by means of copper rods with a cross-section of no less than (20 x 5) mm2.D – Two sub-groups of copper distribution rods, each group consisting of three cross-sectional rods. Not less than 20 x 5 mm2.A group for connecting the automatic breakers that perform partial extinguishing at midnight, and the second group for connecting the automatic breakers that perform the complete extinguishing at the end of the night. E- A group of single-phase automatic breakers with a capacity of 50 amps and a voltage of 220 V, or according to what is stated in the special specifications, tables of quantities and drawings, and equipped with electromagnetic protection in the event of a short circuit. They are connected to the two groups of sub-bars with conductors with a cross-section of not less than 16 mm2, and their number is 18 sub-breakers. These breakers are divided into two groups:12 breakers to partially turn off two-thirds of the bulbs at midnight.6 breakers to turn off the last third of the bulbs at the end of the night. =8>f – 300 amp three-phase meter with necessary 300/5 amp current transformers (optional as requested by the local electricity company).g – self-powered 220 V time clock with pulsator A reserve suitable for working at least for 36 hours. The watch has a time dial for 24 hours, on which are installed the contact fingers necessary to control disconnecting and connecting the current and operating the two automatic contactors for ignition and partial and complete extinguishing. A manual switch is installed parallel to the clock to disable its operation when necessary.

* note :

• The capacities of the automatic breakers and connectors on the distribution panel can be adjusted according to the project’s need for electrical capacity. 
• In the case of connecting lamps between two phases when the voltage is 220/127 V, the two automatic contactors and the time clock are connected on the basis of complete ignition and extinguishing, temporarily, provided that all equipment remains as they are, in order to obtain the possibility of obtaining partial extinguishing in the future when the voltage is changed to 380. /220 F.H – A group of measuring and indicating devices, namely: : 
  
  • A device for measuring voltage (volt meter) graduated from zero to 500 volts with a selection switch to measure the voltage between the different phases and between each phase and the tie line in addition to the zero position. 
  • 3 devices for measuring current intensity (ampere meters), ranging from zero to 300 amps, with the necessary current transformers of 300/5 amps. 
  • 3 indicator lamps with color indication (red – yellow – blue). 

All previous measuring devices must be installed at the top of the panel.All control, protection and measuring devices inside the panel must be installed on a metal frame made of iron angles painted with oven paint. All connections between them are made in an artistic manner, in coordinated alignments, and are collected in groups within plastic ducts. The main feeder cable is connected to the main automatic breaker in the panel via cable heads or directly.The cables for the lighting line exits are connected and connected. On the panel using strong, heavy plastic terminal blocks (Terminal Block) that can accommodate cables up to a cross section of 35 mm2, and their number is equal to the number of single-phase automatic breakers.The panel is provided with a complete diagram showing how to make connections between devices, which is pasted on the panel’s outer door from The interior.The contractor must provide the following technical data about the painting:

• The name of the company that manufactured the distribution panel and the devices installed in it. 
• Providing all catalogs and technical specifications for all devices, as they must be from the finest industries. 
• Panel dimensions and equipment locations with drawings. 
• Wiring and device distribution diagram. 
• Total plate weight. 

7 Distribution panels for lighting residential neighborhoods:

The sub-distribution panels for supplying residential neighborhood lighting lanterns shall be made of sheet metal painted in the color chosen by the Ministry and at least 1.5 mm thick. They shall be tightly closed. They shall have a door with hinges and a key to close the door with, with appropriate dimensions. They shall be fixed to the walls at a height of no less than 180 cm. From the surface of the ground or according to the instructions of the supervising engineer.It is fed with a main feeding cable from the electricity company’s meter or from another lighting distribution panel belonging to the Ministry. It is extended inside a plastic tube up to the inspection room located under the sub-distribution panel. As for the part of the cable confined between the inspection room and the aforementioned distribution panel, it is extended inside a galvanized steel tube with a diameter of no less than 2 inches and is fixed to the wall in a vertical position.The panel includes the following equipment that is valid for operation at a frequency of 60 oscillations/second or according to the local electricity company’s system:

A – A three-phase automatic breaker with a capacity of 100 amps and a nominal voltage of 600 volts. It is manually operated and disconnects automatically when the load is overloaded or short-circuited. It is calibrated and operates at an ambient temperature of 50 degrees Celsius. B – An automatic contactor with a capacity of 100 amps, a voltage of 231/400 volts, three phases with an operating coil that operates at a voltage of 220 volts.C – A time clock or a photocell:

• Time clock: operates on 220 volts with a 36-hour reserve spring. 
• Photocell: It must have a capacity of no less than 10 amps, 220 volts. The cell operates at a light intensity of no less than 5 lux and closes at 300 lux. It must not be affected by any emergency lighting for a period of no less than two minutes and must not be affected by passing weather factors. Everything that It is required for installation and connection in accordance with the manufacturer’s instructions and with the approval of the supervising engineer. 

D – Four copper distribution bars, each section (20 x 5) mm2, with all necessary insulators.E – Single-phase branch automatic breakers, each with a capacity of 20 amperes, no. Less than six breakers, or according to what is stated in the tables of quantities and drawings.The contractor must provide detailed drawings of the distribution panel and the method of installing the devices inside it for approval by the supervisory authority before supply.The contract shall be determined Sites for installing panels on the ground according to the instructions of the supervising engineer.

8 branch boxes:

The branch box is made of sheet iron with a thickness of not less than 1.5 mm, painted with oven paint in gray or any color chosen by the Ministry. It is of the type that is installed outside and does not allow water and dust to enter and has a door with a special lock.The box is equipped from the inside with four copper rods with a cross section of (15 x 5) mm2 to which the feeding cable is connected along with all the necessary fixing insulators and is installed. There are 12 screw-type fuses on the rails with a base capacity of 60 amps to which the sub-feeding cables are connected, provided that the capacity of the fuses is according to the load. As for the neutral lines, they are connected directly to their copper rod, and the branch box is also provided with a copper ground rod of the same cross-section.The branch box is grounded via a bare copper cable connected to the lighting panel to which it is connected or via a special ground work. The contractor must provide technical catalogs for the fuses, the name of the company that manufactured the box, and explain its dimensions.

9 transfer centers:

When the required voltage of 380/220 volts for street lighting is not available in the local electricity companies, a conversion center is established for the project, and the local electricity company feeds it with electricity. It is implemented in a location determined in agreement with the local electricity company and the engineer supervising the project.The conversion centers are in one of the following two forms:Medium voltage conversion center (voltage reducer). : 13.8 kV / 400 / 231 volts.Low voltage conversion center (voltage raising): 231/127 V / 400 / 231 volts.The conversion centers are divided In terms of composition, it is as follows:

1/9/1 Pneumatic conversion center:Figure No. (14) and it consists of the following:

• An iron column in the shape of the letter (H) with appropriate fittings for installing the transformer. 
• An electrical transformer with the capacity and voltage shown in the table of quantities. 
• Protection devices, which are:A – in the case of medium voltage: 
  
  • Air knife cutter with fuses: Figure No. (15) with the following characteristics: 
    • Rated voltage 13.8 kV. 
    • Rated current 200 amps. 
    • The shortening current for one second is 10 kA. 
    • Peak current: 25 kA 
    • Three-phase lightning rod with a voltage of not less than 13,800 volts. 

B- In the case of low voltage: 

• Three-phase magnetic thermal automatic breaker with a capacity of 400 amps inside an external type metal box. 

1/9/2 Ground transfer center:

It can be in the following two forms:

A – Private conversion room:It is built according to the specifications and plans of the local electricity company at the location specified by the municipality. The price includes building the entire room according to the specifications, ready for use.

B- Combined conversion stations:They are completely enclosed metal rooms suitable for outdoor use in hot climate conditions (ambient temperature is 50 degrees Celsius).It is made of iron sheets with a thickness of no less than (2) mm, painted with oven paint that is resistant to corrosion and harsh weather factors.It is resistant to shocks and prevents the penetration of water, insects, and dust into the interior, so as to provide good natural ventilation for the internal equipment. The roof of the station is made to prevent rainwater from accumulating on it and is equipped with strong rings for loading and unloading.The base of the station is provided with openings for cables to enter and exit from it.It is suitable for installation on a concrete base.The station is provided with doors for each section, and the door frames are provided with a gasket of rubber or good plastic so that the doors can be locked tightly with special locks. Figure No. (16).The metal transfer station consists of three sections:

– Medium Voltage Section:This section contains:

• Knife cutter with three 13.8 kV fuses to protect the transformer. 
• Medium voltage cable termination box for section up to 3 x 25mm2. 
• All necessary clamps, ground connection points to the cell body, and all necessary safety means to protect people. 
• In the case of toroidal circuits, the necessary entry and exit cells are added. 
• This section is suitable for operating at a voltage of 13.8 KV at a frequency of 60 oscillations/second, or according to the local electricity company’s system. The contractor must contact the local electricity company to find out before supplying. 

• Medium voltage 13.8 kV ± 2.5% to ± 5%, with a frequency of 60 oscillations / second, or according to the voltage used by local electricity companies. Low voltage 400/231 V three-phase, four-wire system. 
• The method of delivery is a star triangle. 
• The transformer efficiency is not less than 97%. At full load and power factor 90%. 
• Cooling is normal with oil, and the transformer is supplied complete with oil. 
• The transformer has a thermometer with a maximum temperature indicator, oil drain and fill holes, a voltage change switch, and a mounting base. 
• In addition, it contains medium and low voltage outputs that are insulated and connected internally to the medium voltage section on the one hand and to the low voltage section on the other hand. 

* comments :

1. When supplying a medium voltage transformer separately, it is preferable that it be of the closed type, meaning that the medium and low voltage poles are closed with terminal boxes for connection, unless the electricity company requests otherwise. 
2. The transformer station can be low voltage, that is, the transformer works to convert the voltage from 220/127 V to 380/220 V. 

In this case, the medium voltage section is canceled and the contractor supplies in its place a three-phase low voltage automatic thermal magnetic breaker with a capacity of 400 amps (or according to the capacity of the transformer) inside a closed box installed at the entrance of the transformer and its price is included in the price of the station.

Low voltage section:It is a complete distribution panel as shown in Clause No. (1/6).

10 Low voltage distribution transformers:

• Transformer capacity (at ambient temperature 50°C) as stated in the tables of quantities. 
• It converts the voltage from 220/127 V to 380/220 V ± 5%, with a frequency of 60 oscillations/second, or according to the local electricity company’s three-phase system, to feed the distribution boards for street lighting and from there to the rest of the lighting network. 
• Natural cooling on oil. 
• In addition, it has the same specifications as previous medium voltage transformers. 
• The transformer is provided with a three-phase magnetic thermal automatic breaker with a capacity of 400 amps, or according to the capacity of the transformer on the low voltage side of 220/127 V inside a metal box, and its price is included in the price of the transformer. 

* comments :

1. Bidders must submit catalogs and drawings that show the technical characteristics of the station, in addition to its shape, size, total weight, method of opening doors, and the name of the manufacturer. 
2. In the case of supplying transformers, the technical information for the transformer must include the following: 
   • Gross weight of transformer with oil. 
   • Amount of filling oil. 
   • Capacity loss in copper without load and at full load. 
   • Power lost in the magnetic circuit without load and at full load. 
   • Transformer temperature at full load. 
   • The percentage of load in excess of the rated (nominal) load that the transformer can withstand for an hour. 

1/11 ground:

1/11/1 Ground distribution panels or electrical transformers:

It consists of:

• Pure red copper plate with dimensions 600 x 600 x 4mm. 
• An iron rod covered with a layer of copper, 1.5 meters long and 16 mm in diameter 
• Uninsulated stranded copper conductor with cross section 70mm2. 
• Everything needed for connection and connection, including screws, nuts, and metal rings (roseces) made of copper or galvanized iron. 

1/11/2 Ground Columns: It consists of:

• Copper-clad iron rod with a diameter of at least 16 mm, galvanized iron angle 60 x 60 x 6 mm, or galvanized iron pipe with a diameter of 2 inches, 1.5 meters long for each type. 
• 16mm2 stranded copper uninsulated conductor 
• Everything needed to connect and connect. 

1/11/3 Continuous grounding network:It is a non-insulated conductor made of stranded copper with a cross section of 16 mm2.

Chapter Two: Installation of materials

1 columns

• Determining the locations of the columns:Before implementing the project, the contractor, through his technical staff and with the knowledge of the engineer supervising the Ministry, determines the locations of the columns and the cable path. He must ensure that the columns are straight. 
  
• Installing the columns:The columns are installed in the following manner:A hole is made in the place specified for the installation of the column, with dimensions appropriate to the dimensions of the concrete base. 
  
  

A – Planted columns:The concrete base is poured in the hole or outside, and its dimensions are according to Table No. (8) and Figures No. (17) and (18), so that 20 cm is visible from the base. Above the ground level above the asphalt level. A pipe is placed on the side of the sidewalk, or two pipes on both sides, within the concrete pour, at an angle, so that these pipes meet the two holes designated for the entry and exit of cables in the column, depending on whether the cables are extended to the inside of the sidewalk or on the straight line of the columns. The column is dropped into the concrete base and is temporarily fixed vertically with appropriate orientation and in alignment with the rest of the columns using wooden wedges.The cables and ground conductor are inserted into the column and then the space between them is filled. The column and the mold are filled with fine sand to a height of 20 cm from the end of the mold, then the remaining space is filled with cement grout.

B- Columns fixed with nails:The nails are welded, or each nail is attached with two nuts, to a metal plate with a thickness of not less than 10 mm, exactly matching the base for fixing the column. Then the nails are installed and the plate is weighed completely horizontally. Place a pipe on the side of the sidewalk or two pipes in the form of an elbow, facing each other on both sides, so that the pipe ends in the center of the base at the top, and then concrete is poured either outside the hole or inside it. The dimensions and shape of the concrete base are according to the height of the column above the ground, as in Table No. (9) and Figures No. (19/A) and (19/B). The concrete base is made such that it protrudes 20 cm above the level of the asphalt surface.

Table No. (8) Bases of implanted columns 

Where:p: the height of the concrete base.g: the length of the planted part of the column.n: The depth of the concrete base below the end of the column.i: The length of the side of the base.f: The diameter of the hole into which the column will fall.s1 : The diameter of the column base.

Where:p: the height of the base.i: the length of the side of the base.

• Concrete mix for column bases:The concrete mix is ​​made according to the following proportions for each cubic meter of concrete: 
  
  • 350 kilograms of portland cement. 
  • 0.800 cubic meters of fine gravel. 
  • 0.400 cubic meters of clean washed sand. 

The contractor must spray the concrete foundations with water daily for three days to prevent any cracking.

C – Columns in rocky places (above mountain slopes):Four holes are made in the rock with a diameter appropriate to the diameter of the anchor bolt and at dimensions equal to the dimensions at the column’s mounting base, and the adhesive is poured ( Liquid epoxy to fill the remaining space between the nail and the hole and leave it for a week to dry completely, or according to the instructions of the manufacturer of this material.

2 zodiac signs:

The tower installation process includes the following steps and work:

• Make the reinforced concrete base and the necessary excavations for it, in accordance with the instructions No. (20-A, 20-B, 21, 22, 23-A, 23-B) or according to the manufacturer’s instructions and after the approval of the supervising authority, noting the following: 

a – The soil potential is 2 kg/cm2. (It must be taken into account if the quality of the soil is different from normal soil) and that the soil must be suitable for foundations.B- Reinforcing the base is done by placing 6 x 12 mm/m reinforcement steel in each direction and in a box shape.c – Steel with protrusions uses a yield stress (maximum elastic limit) of 4200 kg/cm2.d – The fracture stress of concrete cube specimens after 28 days should not be less than 250 kg/cm2. e – Appropriate cement is used according to the nature of the ground (sulfate-resistant) in sulfurous ground, and the concrete is well condensed with vibrators and kept from drying out for seven days.f – In the event of the presence of harmful groundwater, the foundations must be well insulated.g – Connect the reinforcing steel well.h – A clean layer is created under all the foundations, 10 cm thick. It should stand out from it in every direction by a distance of 10 cm.

• A special inspection room is created for the tower through which cables are pulled to the tower fuse box, and its specifications are the same as those of the general inspection room. 
• The tower shall be mounted on the base, with the necessary weight and installation done so that the tower is placed vertically, using a crane suitable for this purpose, taking into account road safety. The contractor shall bear any risks resulting from this. 
• The vehicle of the searchlights or lanterns and their accessories shall be installed and the searchlights shall be installed in it according to technical standards, while providing all necessary means of protection and safety and making all necessary connections. Taking into account that the lighting lanterns or installed spotlights are fed by the lighting network controlled by a time clock in the distribution panel. As for the movement of the crane and the trolley, they must be separate. For this purpose, special cables are used for each tower, and the supply is permanent in order to require daily maintenance work. It is controlled by a switch installed in each tower that feeds the socket for operating the crane’s motor. 

The contractor must provide one electric motor for every ten installed towers or part thereof for maintenance work.

3 lanterns:

3/1 Installing lanterns on poles:The operating equipment for the lantern is installed and recommendations are made between them using insulated, heat-resistant copper conductors with a cross section of no less than 1.5 mm2.Then the lantern is installed on the pole or on the arm in a secure and strong manner, taking care to ensure that the position of the lantern is perpendicular to the street axis if the pole is with an arm. After that, insulated copper cables are extended with a cross section of no less than 2.5 mm2 and connected to the lantern on one side and to the fuse box on the other side, with a grounding conductor for the lantern.The price of installing these cables is charged to the price of installing the lantern.The price of installing these cables is charged to the price of installing the lantern. a>

3/2 Installing lanterns on the walls:The lantern is fixed to the arm (which is a galvanized iron tube with a diameter of 1.5 inches or a diameter that is proportional to the opening of the lantern) using a special clip that is connected with screws. And stainless steel galvanized nuts. The arm is provided with a welded base made of 3 mm thick sheet metal with dimensions of 20 x 30 cm and has four holes that are fixed to the walls using four nails (screws). The arm and base are painted with oil paint in gray or the color chosen by the Ministry if it requests it. The lantern is installed so that its height is 5 meters above the ground, except in exceptional circumstances, when its height can be 4 meters above the ground or according to the instructions of the supervising engineer.

4 Pipes (pipes):

• The pipes must be carefully cleaned from the inside before pulling the cables, and they must be continuous and completely clean from any debris, stones, sand, etc. 
• The tubes are connected to each other by tamping and using an adhesive in it. 
• Pipes are extended underground at a slope of 75 mm for every 30 meters in the direction of the manholes, and the necessary measures are taken to prevent water from accumulating in them. 
• It should be taken into account that the soil under the pipes adjacent to the manholes is well compacted or supported in another way when the pipe penetrates one of the manholes in order to avoid shear stress on it at the point of penetration. 
• When extending pipes on bridges, the following should be taken into account: 

A – As for cable pipes stretched on bridges, they must be able to allow the expansion and contraction of the bridge.B – When the pipe penetrates the bridge support, it must be installed on In a way that makes it avoid or resist shear stress that may result from subsidence in the soil.C – For pipes installed on bridges (bridges) that are made of materials that conduct electrical current, they are effectively grounded. 

• When extending pipes under railway lines, the following should be taken into account: 

A – The highest point of the cable pipes should be lower than the lowest point of the railway tracks extending in the streets by no less than 90 mm.B – Not establishing inspection rooms in the area designated for railways. . 

* Note:The pipe extension item includes all the necessary connection and connection materials, such as elbows, adhesive materials, and a fine sand bed along with the connection and connection. Accounting is based on the quantity actually executed on the ground.

5 Electrical cables:

The route of the cables is shown approximately in the attached drawings of the project, and the contractor must verify their lengths and locations on the ground. Their final route will be determined upon handing over the work site to the contractor or upon implementation by the supervising engineer. It is extended in the following manner: Before starting excavation, the contractor must obtain approval to excavate from all responsible official authorities, and he must inquire about the path of electrical and telephone cables, water extensions, and all services buried under the surface of the ground in order to avoid any accidents. Or damages that may occur to these extensions during excavation, and the contractor is solely responsible for all damages that occur as a result of excavations, whether material or human losses.The contractor must put in place the necessary means of protection, such as barriers, ropes, directional signs, and warning signs. And organized traffic signals around the excavations and in places visible to traffic near the site. If the area needs more protection, protective barriers are erected and the contractor appoints one of his workers to warn passers-by of the dangers if the nature of the work and traffic requires that.And if Circumstances required excavations to be carried out at night, so warning lights should be installed and excavations should be fenced with protective barriers in order to alert and protect citizens. He must also place bridges over the excavations in appropriate places to facilitate the passage of citizens. He must also take all necessary precautions to prevent any damage or obstruction to traffic resulting from the excavations and the implementation of the works.

5/1 Extending cables in the streets:

• The contractor will dig trenches along the required streets and in the specified places, with a depth of 70 cm and a width of not less than 30 cm, and level the trench floor well, clean it of stones, pave it and compact it. In the event of installing more than one pipe in the same trench, the width of the trench shall be increased by the amount of the additional pipe diameters. 
• The contractor must not extend and cover the pipes until after the supervising engineer inspects the trench excavations and ensures that the path and dimensions of the excavation are correct. 
• The floor of the trench is covered with fine sand 10 cm thick. 
• Plastic (PVC) or asbestos pipes are stretched along the trench by compacting them together while maintaining their straightness along the trench. The pipes may not bend more than 15 degrees. 

If the deviation angle is more than 15 degrees and the cable sections are larger than 6 mm2, an inspection chamber must be made at the corner point.In the case where the cable sections are 6 mm2 or less, plastic elbows can be used. The radius of its curvature shall not be less than 30 cm.

• Spread another layer of fine sand 10 cm thick over the pipes. 
• A bare copper stranded ground conductor with a section of 16 mm2 or 10 mm2 is extended alongside the pipes and buried in the dirt (if the bills of quantities request a ground network). 
• The rest of the trench is filled in first with fine soil, then with the dust resulting from the excavation after sifting it. The soil must be compacted several times with a heavy bullet and sprayed with water to make it hard so that no decline occurs in the future. 
• Restoring the land to its natural state:After carrying out the excavations, the contractor must return the land to its condition before excavation and before laying the cables, and re-pave the street and pave the sidewalks, whether they were asphalt or tiled, after completion. From extending cable pipes directly. The contractor is responsible for keeping the land in good condition after returning it to its original condition for a period of at least one year of warranty. Therefore, he must make sure before asphalt and paving that the backfilling was done in a strong and solid manner so that nothing happens to it. He must also remove and transport all excess waste and soil resulting from the excavations. To places where it is permitted to throw dust and clean the streets and sidewalks of all dust and excavation remains. 
  

5/2 Laying cables on the slopes of mountains:Excavations are conducted on the slopes of the mountains at a depth of about 30 cm. A heavy-gauge (PVC) pipe with a thickness of no less than 3 mm is exposed and it is covered on both sides and the top with concrete. Thickness 15 cm.

* Important Notes :

• The degree of bending of cables should be controlled so that the bending radius is not less than that specified by the manufacturer. 
• Care must be taken to limit the tensile and lateral pressures on the cables, and the contractor must take all necessary precautions during transporting and laying the cables to prevent them from being subjected to any mechanical stress or damage. 
• Care must be taken when pulling cables and connectors inside pipes and columns and not using force to prevent any damage to the insulating layer or protective outer covering. 
• It is not permissible to remove the insulating material of the conductor in any part of its length, except for the ends of the ends specified for the connection. The insulation shall be removed in accordance with technical procedures, taking into account that the removal is of an appropriate length that allows the connection to be connected securely. 
• The cables must be of continuous length and without connections between each two columns or between the distribution panel and the first column. The contractor must measure the length of the cable required to be extended for each part of the work accurately and according to the cable path on the ground. 
• In the case of sidewalks and islands, the cables are laid inside plastic (PVC) pipes. In the case of paths at the intersection of streets, the cables are laid inside asbestos cement pipes with a diameter of 4 inches, and the intersection area is well compacted to prevent subsidence of the ground in the future, or a concrete pour is made around these pipes with a thickness of 20 cm. 
• The cross-sectional area of ​​the cables, including the conductors and the insulating material lying inside a tube, must not exceed 40% of the tube’s cross-section. 
• Do not place fuses, switches or breakers on the tie line or grounding conductor. 
• It is prohibited to connect any new additional electrical loads to any column or distribution panel unless it is confirmed that the cable feeding the column or panel can withstand these additions. 
• In the event that there are obstacles during implementation that require amending the original plan of any trench and changing its depth, width, or path, this will only be done after obtaining the approval of the supervising engineer. 
• The price of extending the cables whose sections are specified in the tables of quantities includes extending the cable inside the pipes and columns and supplying all materials necessary for splicing and connection, as well as attaching and connecting the cable to the connection box (fuse box) to the columns and attaching it to the panel. 
• Accounting is based on the quantity actually executed on the ground. 
• Connecting cables to junction boxes (fuse boxes). 

The supply cables are inserted and taken out of each lighting pole through the holes prepared for this purpose, and they are connected to each other within the connection box and the fuses installed in the pole from which the electric current is delivered to the lamp. It must be noted when inserting the cable into the pole that it is loose and not tightened, and the connection must also be It is good and sturdy and does not contain any kinks. The insulation of the cables must be removed in order to connect to the necessary extent. After connection, the cables are tightened with clips tightly to prevent them from slipping, and the connection should not be burdened by the weight of the cables.

6 distribution panels:

• The panel is installed on a reinforced concrete base at a height of 40 cm above the asphalt surface and about 75 cm deep below the surface of the ground. The size of the concrete base is determined according to the size of the panel base plus (10-20) cm for each side of the panel base. It is fixed with nails (screws) with a diameter of 1/2 inch and a length of no less than 30 cm. A number of 6 connections of plastic pipes with a diameter of (3-4) inches are placed at the facade of the concrete base for the entry and exit of cables to feed the lighting poles through it, and one other connection for entering the feeding cable as in Figure No. (24). 

The concrete mix ratio for the base is as follows:

• Sand 0.4 m3. 
• Gravel 0.8 m3. 
• Cement 350 kg. 

Note:The price of the base is included in the price of installing the panel.

• The feeder cables are connected within the panel and operated on a complete and partial switching off basis for the lighting of the project using the time clock that controls the operation of the automatic contactors designated for connecting and disconnecting the current. Street lighting is divided into two parts: 
  1. The first section of lamps remain lit from the beginning of the night until the end, and they represent a third of the lamps. 
  2. The second section of bulbs remains lit from the beginning of the night until midnight, and represents two-thirds of the bulbs. 

In order to achieve partial extinguishing, the bulbs of the first section are connected to one phase and the bulbs of the second section are connected to the other two phases for each feeding cable separately. This is done by connecting the bulbs sequentially and in order, while maintaining the balance of the loads on the three phases in both cases and in each distribution panel.

7 inspection rooms:

The manholes are constructed according to the plans of regular concrete (250 kg) cement with a frame made of iron angles and have a cover made of reinforced concrete or heavy cast iron. The covers must be designed in a way that prevents them from being lifted easily without the use of manual tools. They must be suitable and restricted in movement so that they cannot fall inside the room. They must be of sufficient strength to withstand the loads placed on them. The necessary openings must be left at the bottom of the room for cables to pass through and water to drain. When There is a need to raise manhole covers during work, so the contractor must provide the necessary immediate protection for those rooms using protective barriers, secure covers, or any appropriate protection. The contractor bears responsibility for any damages that occur as a result of not covering these rooms.With a note The price for constructing the inspection room mentioned in the table of quantities includes constructing the entire room, including excavation, construction, interior plastering, cover, throat, and everything necessary for the room.Figure No. (25) shows one of the models of inspection rooms. The project owner has the right to submit other models at the same price.

8 Grounding:

8/1 Grounding electrical panels or transformers:The pure red copper plate is buried vertically in a hole with dimensions of 100 x 100 cm and at a depth of no less than 200 cm next to the distribution panel or transformer station. The copper plate is attached to the copper rod by means of a copper screw with the necessary nut and metal rings (pins) or by copper welding. The end of the upper rod ends in an inspection room with internal dimensions of 40 x 40 x 50 cm and a wall and floor thickness of 10 cm made of regular concrete, with an iron angle of 30 x 30 placed. × 3 mm along the perimeter of the manhole from the top, where it is covered with a cover of heavy cast iron or reinforced concrete. (Figure No. (26).The hole around the copper plate is filled with soft soil first, then quantities of table salt and charcoal powder are placed in the appropriate amounts so that the resistance of the ground does not exceed 5 ohms, and so that there is no table salt The charcoal powder is in contact with the copper plate or ground rod, then the hole is filled with dirt.A 2.5-inch galvanized iron tube (pipe) is placed next to the ground rod, its upper end at the floor level of the manhole, and its lower end next to the ground rod. The copper plate. This is to pour water into it and moisten the ground around the copper plate.The main grounding wire is connected to a 70 mm2 section of bare copper from the distribution board or from the transformer station to the grounding rod within the inspection room using a special copper clamp. The price of the ground is charged to the price of the distribution board or transfer station.8/2 Grounding of columns:The columns are grounded in one of the following two methods or both together and according to what is stated in the tables of quantities. The nature of the land and its characteristics are shown in Table No. (10).

Table No. (10) Specific resistances of lands with different characteristics 

A – Separate ground for each column:The copper rod is hammered into the ground next to the column or in the floor of the manhole (Figure No. 27) next to the base of the column, if any, so that its upper end is at a depth of 50 cm. From the surface of the earth, the ground conductor is connected to it through a special fastener or by means of bolts, nuts, and metal rings (rosettes).

B- Continuous grounding network:The braided bare copper cable is extended in the same cable pit adjacent to the pipes (pipes) in which the electrical cables are extended and continuously from the distribution panel to the end pole of each line. It is attached to the place designated for it in each column using special screws with metal rings and nuts made of copper or galvanized iron. All copper grounding cables are connected to each other in the distribution panel and then connected to the ground of the distribution panels or transformer stations using Uninsulated copper cable with cross section 70mm2.

Chapter Three: General Conditions

1 Definitions:

Ministry: means the Ministry of Municipal and Rural Affairs or one of its affiliated bodies (secretariat/directorate/municipality/village complex).Contractor: the institution or company contracting with the employer to carry out the implementation of the project.

2 Electrical feeding system:

Street lighting is generally fed in three phases, four wires, according to one of the following two systems:A – Voltage 380/220 V, 60 oscillations/second, or according to the local electricity company’s system. Connecting the bulbs between the phase and the neutral.B- Voltage 220/127 V, 60 oscillations/second, or according to the local electricity company’s system. The bulbs are connected between the two phases at a voltage of 220 V.The contractor must contact the local electricity company through the municipality to which the project belongs to agree on the final determination of the locations of the distribution panels and the connection of electrical current to the project after receiving the work site, as well as verifying the voltage and frequency with the local electricity company so that the materials and equipment supplied to the project are identical to that.

3 Technical information and catalogs:

The contractor must submit with his offer all technical catalogs that show the specifications of the materials and equipment offered by him, their place of manufacture, and the name of the manufacturing company.

4 charts:

The Ministry has the right to request modification of the plans and determine the locations of the columns, cable paths, and locations of the feeder panels in a final manner upon implementation, taking into account the regulations, any special conditions, local obstacles, or any other requirements that require a change in the plans and location. The contractor must provide (3) three copies of the plans according to which the works were carried out without any financial compensation.

5 Climatic and regional conditions:

The contractor must take into consideration, before submitting his bid, the climatic conditions of the work site and the circumstances surrounding the implementation of the project. He must review the site, climatic conditions, soil quality, and the nature of the land for the work site.

6 Supply of materials:

The contractor must supply the materials according to the specifications and from the manufacturing companies that he mentioned in his offer and were selected by the award committee.In the event that the contractor submits several offers from different industrial companies for one type, the right to choose In this case, the Ministry shall have the right.It does not accept any alternative materials to those produced locally as long as they meet the purpose in accordance with the relevant regulations.

7 Technicians:

• The contractor must use qualified technicians who have long experience in implementing street lighting works. 
• The contractor shall have an electrical engineer who will technically supervise the implementation of the project. 
• Once the contractor receives the work site, he submits the papers and documents proving the presence of an electrical engineer to the Ministry. 
• The Ministry has the right to ask the contractor to replace any technician who is found to be incompetent for the work. 
• The technical workforce required for this project shall be in the following numbers as a minimum:

(1) An electrical engineer to be present during the implementation of electrical works.(1) A specialized electrical technician. 

• The fine for the absence of the contractor’s electrical technical staff is determined for each project, depending on its size and nature, provided that this is stated within the project’s special specifications. 

8 Equipment:

The contractor must have sufficient equipment to carry out these works, and this equipment must be in good condition, and a complete statement of it must be submitted to the supervising agency in order to approve its quality. The contractor has no right to move this equipment from the work site except after the completion of the work, or upon obtaining written approval from the Ministry to do so.

9 Site delivery:

• After signing the contract, the Ministry requests in writing from the contractor to receive the site on a specific date. If he or his representative does not attend, a report is drawn up, and this date is considered the date of receipt of the site. The report is drawn up in three copies, one of which is delivered to the contractor or sent to him by mail in the event he does not attend. 
• In the event that there are obstacles that prevent the receipt of the site, a report is drawn up and another date is set, ensuring that it is an appropriate date so that the Ministry can remove the obstacles. Then a report is drawn up to hand over the site on the new date. 

10 Timetable for project implementation:

The contractor must submit the timetable for implementing the project immediately upon receipt of the work site, within fifteen days from the date of his request, provided that it explains the following:

• Arranging the stages of work implementation. 
• The start date and end of the various phases of the project. 
• Overlapping of non-conflicting elements with each other. 
• This program, after its study, review, approval by the engineer, and approval by the employer, is considered binding on the contractor, according to which he is bound to perform the various works of the project. 
• It may also be necessary during the implementation of the works to introduce some modifications to the original program (whether this is due to the contractor’s slowness in implementation or otherwise or at the request of the employer). This is done by agreement between the engineer and the contractor and then ratified by the employer and becomes binding on the contractor. 

11 Inspection of materials and equipment arriving at the site:

• The contractor shall inform the Ministry in writing of the arrival of the materials and equipment that he supplied for installation in the project, specifying the date of their arrival at the work site. 
• The Ministry assigns the electrical engineer supervising the project to inspect and examine the materials and equipment and match them to the book of conditions and specifications, the contractor’s offer, and the catalogs attached to his offer. The contractor is notified of the accepted and rejected materials. The contractor has no right to install the rejected materials. The accepted materials remain at the contractor’s disposal and under his full responsibility for him to install them on site. 
• The report of the inspection of materials or equipment does not replace the initial receipt and does not relieve the contractor of responsibility for delivering the materials and equipment in a sound vehicle, free of defects, conforming to the conditions and specifications, and ready for operation. 

12 Business preview:

When the scheduled end date for the project arrives and the contractor has not been able to complete all the works subject to the contract, the engineer shall prepare an inspection report detailing an inventory of the works that have been implemented and conform to the conditions and specifications. With a statement of the works benefited from and those not benefited from and the works that have been carried out as the subject of the contract.

13 Primary reception:

• When the contractor finishes completing all the works that are the subject of the contract, he informs the Ministry in a written letter that the project is ready for initial receipt and must state the date on which the works will be completed. 
• The contractor must submit the initial receipt request letter one month before the date on which the work is expected to be completed, in order to complete the procedures for appointing a committee for the initial receipt of the project during this period on the specified date. 
• In the presence of the contractor or his representative, the committee inspects all parts of the project and matches them to the book of conditions, specifications and catalogs contained in the contractor’s bid. 
• The committee conducts various necessary experiments to ensure that the project is ready for good use and can be placed at the Ministry’s disposal for operation. 
• If the committee confirms that there are no observations or deficiencies that prevent benefiting from the project, an initial receipt report for the project will be drawn up, which the contractor will sign with the committee members and give a copy of it. 
• The engineer supervising the project prepares an inventory book for the work completed and then prepares a final summary of the materials and installed equipment only that conform to the conditions and specifications. 
• The warranty year begins from the date of initial receipt of the entire project. 
• In the event that there are deficiencies or observations that prevent benefiting from all or part of the project, the committee will write an inspection report mentioning all the deficiencies and violations that prevented the project from being received. 
• The Ministry shall inform the contractor in writing of the deficiencies and violations mentioned in the inspection report prepared by the receiving committee so that he may complete the deficiencies and remove the violations within a period determined by the Ministry. 
• When the contractor completes the deficiencies and removes the violations, he will notify the Ministry so that the receiving committee can verify this and prepare the initial receipt report for the project. 
• If the contractor is late in completing the deficiencies within this period specified in the inspection report, the Ministry has the right to complete the project and remove the violations at his expense. 
• If the project is not connected to an electrical supply source, the contractor must secure a source of electrical current by any means, at his own expense, and the necessary equipment to conduct experiments in order to test the project and ensure the safety of the equipment and that it is working well. 

14 Final summary:

After initial receipt of the project, the engineer prepares a final summary listing all the work that was carried out in accordance with the conditions, specifications and schedules of quantities.

• The contractor or his authorized representative signs the extract. 
• This extract includes any additional work that the contractor may have been officially approved for. 
• It will be referred to the competent authority to complete the audit and disbursement procedures, provided that the following documents are attached to it: 
• A copy of the contract and a copy of the bill of quantities. 
• Original site delivery report. 
• Original modified bills of quantities. 
• Original approval of the authorized person to assign additional work. 
• An original letter assigning the contractor to additional work. 
• The original inspection report at the end of the period. 
• The original receipt of the initial receipt (and the duration of the delay, if any). 
• Original entry notes for supplies that were not installed (if any). 
• A copy of a valid zakat certificate. 
• The original contractor’s letter addressed to the entity indicating the completion of all project work. 
• A copy of the final guarantee for the project. 
• Original award letter. 
• The original contractor’s letter addressed to the entity containing a work request and a final extract. 

15 Warranty:

• The contractor guarantees all materials, equipment and installations for a full year, starting from the date of initial receipt of the entire project, for which the initial receipt report was issued, against any defect resulting from a manufacturing defect or negligence in installation. During this year, the contractor must replace all damaged parts and repair them, free of charge. Any malfunction in the equipment and installation, if the repair is not defective in the equipment and installation and is technically acceptable. Otherwise, the contractor will replace those defective parts with new ones. 
• When malfunctions are caused by a third party, the Ministry provides the necessary spare parts for the contractor to install. 

16 Operation and maintenance during the warranty year:

• The contractor is responsible for operating and maintaining the project according to the maintenance conditions stated below and without charge for a full year starting from the date of initial receipt of the project. 
• The contractor insures all damaged spare parts as a result of poor workmanship or normal use, free of charge. 
• The contractor repairs and installs the faults resulting from an accident caused by a third party, and the Ministry collects the costs of repairing the damages from the person responsible and delivers them to the contractor in exchange for him carrying out the repair process and returning the situation to its original state. 

16/1 General conditions:

The contractor who carries out operation and maintenance work for the lighting network must adhere to the following:

• Securing a permanent office located at the work site and equipped with appropriate means of communication. 
• Providing the necessary mechanisms for maintenance, operation and monitoring, such as a ladder car or an escalator mounted on wheels that is pulled by a small car, and any other mechanisms that are necessary to ensure that operation and maintenance are carried out in the best possible way. 
• Providing inspection and measuring devices necessary for maintenance work. 
• Providing permanent electrical technicians and administrators to conduct operation, maintenance and monitoring work. The contractor must submit their names and certificates to the Ministry for its approval. 
• The technical staff for operation and maintenance includes at least the following elements:

A – An electrician with at least five years of experience in electrical work.B – An electrician for a number of poles not exceeding five hundred, then an electrician is added for every other two hundred poles or Part of it.c – A number of technical and non-technical workers provided by the contractor as needed or when major malfunctions occur, and in sufficient numbers to complete repairs quickly.d – The Ministry has the right to request The contractor may replace any technician due to his incompetence or misconduct.



  

• The contractor is responsible for all accidents and dangers that occur to others as a result of his operation and maintenance work, which result from negligence in maintenance or failure to provide the necessary protection in the lighting network from electrical hazards. 
• The contractor is responsible for the dangers that occur to network equipment as a result of misconduct or poor experience of his workers and technicians. 
• The contractor must carry out maintenance work at the specified times and according to the time schedule agreed upon with the Ministry and in emergency cases without any delay or procrastination. 
• The contractor must maintain lighting permanently, and he must inspect the poles at night to find out which lanterns are out, so that he can repair them immediately, and this should not be delayed more than two days from the date the lantern goes out or from the date the Ministry notifies him by any means of oral, telephone, or written notification. 
• The contractor must submit a weekly report to the Ministry on the state of lighting, which includes a list of the faults that occurred during the past week, which were repaired or which he was unable to repair, along with a statement of the reasons in each case. This report also includes a list of the normal maintenance work that was completed during the week. 
• The contractor must deliver all damaged materials replaced with new parts, such as (poles, lanterns and their components, fuse boxes, cables, etc.) to the Ministry’s warehouse. 

If it is not possible to pull the damaged cables from the ground for any reason, a report will be prepared in conjunction with the Ministry’s representative.

16/2 Operation and maintenance works:

The contractor must provide a schedule for maintaining the street lighting network, dividing it into areas to carry out cleaning and maintenance work on a periodic basis, which includes the following works:

Monthly maintenance:

A – Cleaning distribution panels, breakers, meters, and copper bars with compressed air.B – Cleaning time clocks, resetting the ignition and extinguishing times, and changing them to suit sunset and sunrise.C – Cleaning the photocells (if used instead of time clocks).

Semi-annual maintenance:

A – Cleaning municipal lighting transformers.B – Changing the moisture-absorbing silica gel material (if any).C – Inspecting the transformer oil. And make it at the appropriate level to ensure safe operation whenever necessary.d – Cleaning the lanterns from the inside and outside with compressed air and preserving the reflective surface from the inside.e – Cleaning the cans Fuses.

Annual maintenance:

A – Cleaning and painting the columns.B- Cleaning and painting the distribution panels.C – Cleaning and painting the lanterns.

16/3 General instructions:

In addition to the previous works, the maintenance contractor must perform the following works:

• Repairing any defect or malfunction that occurs to lighting equipment in general, and replacing any damaged piece related to these project equipment as a result of poor workmanship or operation. 
• What is meant by equipment is the components of the street lighting network, including poles, lanterns, bulbs, fuse boxes, cables, distribution panels, transformers, inspection rooms, pipes, etc. 
• Replace extinguished bulbs within 48 hours. 
• Keep the lights off during the day. 
• Repairing damaged cables due to a third party, either by installing a connection box or extending another new cable according to the report of the supervising engineer. The contractor must carry out the necessary excavations, backfill, and return the land to its original state of asphalt and tiles, and remove the excavation waste. The Ministry pays the contractor the costs of these excavations according to the price per linear meter stated in his proposal. . 
• Columns that are shocked or damaged by a third party and that need to be dismantled and transported to the specialized workshops and then reinstalled, the Ministry pays the contractor the repair fees according to the invoices submitted by one of the local workshops. 
• When repairing columns or installing any new columns, they must be painted immediately if they are not galvanized. – As for galvanized columns, they can be painted according to the Ministry’s request. 

16/4 Fines:

• The contractor will be fined five riyals per day for every bulb that remains extinguished after the two-day period given to the contractor for repair, in the event that he is the one responsible for the delay in repairing and lighting it. 
• In the event that the contractor is late in carrying out his duties towards cleaning and maintaining the lanterns and paintings and painting the columns beyond the specified timetable for a period of more than fifteen days, the Ministry has the right to carry out these works at the contractor’s expense without his approval and at any price, regardless of the amount, and the value will be deducted from the contractor’s entitlements or from the guarantee, in addition to fining him. An additional fine of half a percent of the value of the electrical works contract for each day after the aforementioned deadline, provided that it does not exceed 10% according to the government purchases insurance system.’ 
• In the event that the contractor does not repair the damaged column or install another new column to replace the damaged one and repair the burned or damaged cables within a maximum period of one week from the date of his receipt of materials and spare parts, the Ministry has the right to install and repair them at the contractor’s expense, regardless of the costs, and the value will be deducted from the contractor’s entitlements or from the warranty. . 
• In the event that the contractor’s technical staff is not present or one of its members is absent, he is warned to provide the required number, otherwise he will be fined twice the salary of the absent individual for the duration of his absence. The Ministry also has the right to ask the contractor to replace any technician who is incompetent for the work or due to his negligence or for any other reasons, and the contractor must secure a replacement for him immediately. 
• The contractor will be fined one hundred riyals per day for each of the mechanisms necessary for work that is not provided for the operation and maintenance work required of him. 

17 Final receipt:

• At least one month before the end of the warranty year, the contractor must notify the Ministry with a letter requesting the final receipt of the project on the specified date and that the project is ready with all its parts. 
• The Ministry forms a committee for the final receipt of the project and notifies the contractor officially of the date of the committee’s arrival at the project site so that it meets on the specified date in his presence or his representative. 
• The contractor shall provide a source of electrical current if the project is not connected to a supply source and is not operated within the warranty year. 
• The committee shall ensure that the executed works comply with the conditions, specifications, schedules of quantities and plans as follows 

A – Ensure that all equipment and materials are safe and that the project is complete and working well. And that the project’s work throughout the warranty year period was good and that the consumption of materials was normal and acceptable.B – Conduct an audit of the quantities according to the initial receipt statement.C – Ensure that The contractor performs maintenance work to the fullest extent within the period specified in the contract.d – Ensure that the contractor paints the iron columns or towers again during the warranty year. As for painting the galvanized columns, it shall be according to the desire and request of the Ministry.e – Ensure that the excavation fills for the cable sites and re-asphalt have not caused any subsidence.f – The experiment must be conducted on Equipment in the event that the project is not connected to power and has not been operated during the warranty year, and the receiving committee must ensure that the project is safe and fit to work.g – If there are no comments on the project, the committee will write a receipt report The contractor or his representative signs this report with the members of the committee and is given a copy of it.h – If there are notes on the project, the committee will write an inspection report in which those notes are mentioned and the contractor will be given another date for final receipt.< /span>i – The committee or (the engineer) sends the original final receipt report to the competent authority to complete the documents for releasing the final guarantee according to the system.

Technical specifications and general conditions for street lighting

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