PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

Sizes of earthing conductors:
Sl.
System Earthing conductor size and
No.
Material
1 2 3
1 415V switchgear, DG set, Capacitor Control
panel
2
415V LT Motors
Suitable to its rating.
- less than 50 HP 25 x 6 mm GI
- 50 - 150 HP 40 x 6 mm GI
- above 150 HP 50 x 6 mm GI
3 Lighting distribution Board, 14 SWG GS wire
4 Local push Button Stations, Junction Boxes. 14 SWG GS wire
5 Lighting and receptacle system 14 SWG GS wire
6 Earth Electrode 50 mm dia. 3000 mm long heavy
duty GI pipe electrode
7 Street lighting poles 14 SWG TC wire
Note 1: Conductors above ground shall be of galvanised steel to prevent atmospheric
corrosion.
Note 2: Conductors buried in ground or embedded in concrete shall be of mild steel.
15.21 Power capacitor.
Power shunt capacitors in general shall confirm to latest version of IS:13585,
Part-1. Power capacitor control panel shall be housed in metal enclosed cubicle.
Power capacitor shall be mounted on MS angle frame works and capacitor control
panel along with MV panel.
The capacitor banks shall be complete with all parts that are necessary or essential
for efficient operation. Such parts shall be deemed to be within the scope of supply
whether specifically mentioned or not.
The capacitor bank shall be complete with the required capacitors along with the
supporting post insulators, steel rack assembly, copper bus bars, copper connecting
strips, foundation channels, fuses, fuse clips, etc. The steel rack assembly shall be
hot dip galvanised.
GTS : General Technical Specification. Page 134