SPECIAL REPAIR TO LIGHTENING ARRESTER AT AF STATION KASAULI UNDER GE (AF) CHANDIGARH

Amount

M&L for replacement of earthing continuity conductor aluminium strip 25mm x 3.15mm with saddles/ epoxy or porcelain insulators and fixing screws drawn through conduit in trenches / under floor /on wall including insulator complete all as specified and directed.

All as per item No. 1.00 above but except earthing continuity conductor aluminium strip. Note: Old re-usable earthing continuity conductor aluminium strip retrieved from dismantling shall be re-used .

Supply and fixing in replacement 12mm dia, 300mm long end termination aluminium rod fitted with rivets/ nuts & bolts complete all as specified and directed.

All as per item No. 3.00 above but except termination aluminium rod. Note: Old re-usable termination aluminium rod retrieved from dismantling shall be re-used .

M&L for replacement of test point terminal block of gun metal or phosphorus bronze of size 75mm x 75mm x 25mm drilled and screwed including 3 No. 8mm dia 25mm long hexagonal head screws complete all as specified and directed.

All as per item No. 5.00 above but except test point terminal block. Note: Old re-usable test point terminal block retrieved from dismantling shall be re-used .

M&L for earthing complete with GI earth plate electrode of size 600mm x 600mm x 6mm thick burried directly in ground vertically at a depth not less than 2.25m below normal ground level with top edge of earth plate not less than 1.5m below normal ground level, earth plate surrounded from all sides by 15cm thick packed alternate layers of charcoal dust and common salt, electrode connections using galvanized iron strip of size 32mm x 6 mm thick (upto body of equipment) by means of nuts, bolts, check nuts & GI washers connected to main switch board or main control board or test point, protected by galvanized iron pipe light grade 40mm dia bore, and watering pipe 20mm dia bore GI light grade with funnel & wire mesh including all necessary excavation & earth work, PCC chamber in PCC (1:2:4) type B-1, RCC cover, all as shown in electrical plate No 3 of MES Schedule Part-I (2009), testing on completion, including taking out old u/s earthing materials complete all as specified and directed. Note(s) :- (i) RCC pit cover shall be pre-cast of RCC (1:2:4) type B-1, 80mm thick reinforced with XPM not less than 4Kg/Sqm. (ii) PCC chamber shall be constructed 500 mm away from the edge of earth pit. (iii) Rate shall include GI strip and protection pipe of length 7.5m, excess beyond 7.5m length required at site shall be measured and paid separately. (iv) Earth resistance shall be less than 3Ohm. In case test results are not found below 3Ohm, complete earthing will be re-done without any extra cost to Govt.

R. P. Suppliers and Construction Co.

Vinod Kumar Aggarwal

PAWAN KUMAR GOVT. CONTRACTORS

Varindera And Varindera Construction