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## 8.9 Electrical Installations 

## 8.9.1 Lighting 

Lighting shall be installed in all rooms of the plant as follows. Lighting outside shall be installed along roads, on structures, at the gateways and at each corner of the buildings. Lighting outside shall provide a light level sufficient for safe orientation (average 15 lux). Lighting outside shall also include spotlights near installations that require regular maintenance or supervision such as bridges, screens, tanks etc.. 

Led type lamps as well as fixtures shall be preferred as indoor and outdoor applications. 

LED type luminaries to be used indoors will have fabrication LED press, polycarbon housing and polycarbon glass. Its driver will have PFC fixed current , short circuit and over load protection, Aluminum board, operational voltage will be 220-240 VAC, 50-60 Hz, operational temperature will be -30+80 degrees, efficiency will be 92%, operational lifetime will be 60.000 hours, light flux will be minimum 3800lumen, color heat will be minimum 6000 K and power will be minimum 30 watt. It will have property which will allow mounting emergency kit. 

The following average light intensities shall be obtained, the variations not exceeding 25%: 

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The Contractor shall, if required, present a protocol of measurements to the Engineer. 

All luminaries shall be delivered and installed complete with lamps, ballasts, power factor correcting equipment, starters, etc. 

The power factor shall be as minimum 0.9. 

Luminaries for the control room, offices etc. shall be of the decorative type designed to be used with computer monitors. Protection class IP40. 

Other luminaries for the administration building shall be a type suitable for the specific use. Luminaries in the working areas of the plant shall be the industrial type and as a minimum be in protection class IP 65. 

Aeration basins, sedimentation tanks, anaerobic basins, return sludge pumping station, grid&grease clarifier of the plant shall be the industrial type and as a minimum be in protection class IP 65. 

When luminaries are to be installed in rooms with a suspended ceiling they shall be suspended from the slab. No weight shall be applied to the ceiling structure. 

The following luminary types shall be provided for all locations, except working areas where luminaries with sodium or mercury lamps may be used. 

Each luminary shall be connected through a connection box. 

Lighting in each room shall be controlled by means of manual switches placed at each door in the respective room. 

All luminaries and associated gear shall be earthed. 

In no cases shall a flexible cable be used for connection of more than one luminary. 

