A.C Lighting for Indoor -substation

       A.C Lighting for Indoor

Indoor electrical installation

 

The AC indoor electrical installation shall be supplied from more than one sub-distribution board (DB). Which are fed from the main low voltage AC distribution board.

 

-         The lighting and power sub-distribution boards of the control building shall be located in the control room.

 Power outlets circuits will be supplied from a sub-distribution board.

 Lighting circuits will be supplied from another separated sub-distribution board.

 

-         All indoor light fittings, switches, and power outlets shall have a minimum degree of protection IP 30 except those of battery room shall be anti-acid weatherproof with a minimum degree of protection IP 54.

    Control Building and switchgear building

 

-         The lighting installation shall be designed to give the illumination levels for the respective areas set  out  which gives types of lamps to be used, type of suitable mounting for each area, type of power sockets and the limits of glare index requirements.

 

-         One single-phase socket 16 A, shall be installed in the basement every 20 meters along their perimeter as a minimum.

 

-         A minimum of three sockets - single-phase shall be installed in each room except in the Control room,  and 11/22 KV hall, basement,(66 KV switchgear corridor for indoor s/s) where a single phase socket shall be installed every 10 meters along their perimeters and every 20meter for basement.

-         Luminaires shall be selected for ease lamp changing, cleaning and durability.

-         Fluorescent lamps shall be equipped with electronic ballast.

 

-         Discharge lamps shall be equipped with appropriate control gear.

 

-         Light fittings selected for control room shall be low brightness  type.

 

-         Fluorescent lamps shall generally be (36 watts) warm white, cool white, or white.

 

-         Lights for the Control room, basement and 11/22 KV hall (66 kV switchgear corridor in indoor s/s)  are to be switchable from all entry points.

 

     Guardroom & dormitory building

 

-         The minimum illumination level shall not be less than 100 lux.

 

-         Fluorescent lamps shall be installed in all parts of the building except on the outside wall of the building where incandescent lamps shall be used.