Name of Work : PROVISION OF ALMs EARTHING INFRASTRUCTURE AND ASSOCIATED WORKS AT WSA AT AF STATION PHALODI
Sl. No.
Item Description
1
M&L for chemical earthing complete with copper earth plate 900 mmx600 mm x5 mm thick buried directly in ground earth plate not less than 3.0 m deep below normal ground level with top edge of the plate not less than 2.25 m below normal ground level connected to and including copper strip 32x6mmby means of bolts, nuts, check nuts and washers of copper/brass and protected with light grade GIpipe 40mm bore including providing of alternate layer from bottom edge to 30cm above top edge of earth plate by chemical fill compound of magnesium sulphate (80Kg), ground enhancing material, earth powder and after that 1 m back of layer of charcoal dust (400Kg) and common salt (400Kg) including PCC pit in PCC (1:2:4) type B-1 using 20 mm graded crushed stone aggregate, RCC framewith 40mm thick RCC cover reinforced with 8mm dia deformed barshandle including excavation and earth work in any type of soil and medium grade GI watering pipe 20mm bore with funnel and wire mesh complete all as shown in electrical plate No 3 connected to main control board all as specified and testing on completion. Note: (i) Excavation, earthwork, charcoal, PCC pit is covered under this item.(ii) Earth continuity conductor beyond 7.5 mtr shall be measured and paid seperately.(iii) Contractor shall be produced the result of earth below 1 Ohm othrewise earthing will not be acceptable and earthing will rejuvenated at no extra cost till the desired earth resistance is obtained.
2
S&F of copper strip 32mm x 6mm with saddels and fixingscrews for roof conductors and down conductors above ground, earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or burried in ground or drawn in conduit/ pipe or fixed to poles or fixed to wall on insulators or any other indicated situation for loop earthing etc as required copper strip of size 32mm x 6mm complete all as specified and directed.
3
S&F 40 mm bore tube, \"light grade\" galvanised, for encasing strip for mechnical protection, laid under plinth/floor/path/culvert or fixed on wall or as mounting bracket bend to shape with complete accessories suchas bend/sockets/reducer/saddles including necessary threading/drilling works complete all as specified and directed.
4
M&L for test point terminal block made of Gun metal or Phosphorus bronze size 75mm x 75mm x 25mm drilled and screwed & including 3 Nos., 8mm dia 25mm long hexagonal head screw/ nuts/bolts & washers as required complete all as specified and directed.
5
M&L for bore holes of 90mm dia under road/buildingby trenchless manual boring by using augar and laying GI pipe of suitable dia including jointing and laying GI strip and making good the excavated/broken surfaces complete all as specified and directed.
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