REPAIRS TO LIGHTENING PROTECTION SYSTEM AND EARTHING SYSTEM OF EQUIPEMENTS INSTALLED IN TECHNICAL AND DOMESTIC BLDGS AND OTHER MISC WORKS OTHER THAN WSA AT AF STN CHANDIGARH UNDER GE (AF) CHANDIGARH.

Earthing complete with galvanised steel earth plate electrode 600mmx 600mm x 6mm thick buried directly in ground vertically (earth pit not less than 2.25m deep below ground level) with top edge of the plate not less than 1.5mtr 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 galvanised iron strip of size 25mm x 4mm thick (upto body of equipment) by means of bolts, nut check nuts and washers of galvanized iron or steel as shown in electrical plate No. 3 of SSR - 2009 (Part-I) and including necessary excavation and earth work in any type of soil, 20 mm bore medium grade GI pipe for watering, funnel with wire mesh, PCC (1:3:6), type C-1 chamber, pit cover of precast RCC (1;2:4), type B-1 reinforced XPM of weight not less than 4 Kg/Sqm fixed as in replacement, complete all as specified and directed by engineer in charge. Notes:- (i) The unit rate includes galvanised Iron strip upto 7.5 metre from earth plate) earth point/ test point. Qty required beyond 7.5 metre shall be measured and paid separately under respective item. (ii) Excavation & earthwork, PCC pit and cover, funnel with wire mesh, 20mm dia watering pipe, test point terminal and 40mm dia GI protection pipe shall be measured and paid separately under respective items. (iii) Old earthing may have been burried down to a depth of exceeding 2.25m below ground level. No extra payment will be made if excavation is done beyond 2.25m depth to retrieve the old earthing.

Earthing complete with galvanised steel earth plate electrode 600mmx 600mm x 6mm thick buried directly in ground vertically (earth pit not less than 2.25m deep below ground level) with top edge of the plate not less than 1.5mtr 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 galvanised iron strip of size 32mm x 6mm thick (upto body of equipment) by means of bolts, nut check nuts and washers of galvanized iron or steel as shown in electrical plate No. 3 of SSR - 2009 (Part-I) and including necessary excavation and earth work in any type of soil, 20 mm bore medium grade GI pipe for watering, funnel with wire mesh, PCC (1:3:6), type C-1 chamber, pit cover of precast RCC (1;2:4), type B-1 reinforced XPM of weight not less than 4 Kg/Sqm fixed as in replacement complete all as specified and directed by engineer in charge. Notes:- (i) The unit rate includes galvanised Iron strip upto 7.5 metre from earth plate) earth point/ test point. Qty required beyond 7.5 metre shall be measured and paid separately under respective item. (ii) Excavation & earthwork, PCC pit and cover, funnel with wire mesh, 20mm dia watering pipe, test point terminal and 40mm dia GI protection pipe shall be measured and paid separately under respective items. (iii) Old earthing may have been burried down to a depth of exceeding 2.25m below ground level. No extra payment will be made if excavation is done beyond 2.25m depth to retrieve the old earthing.

Porcelain/ epoxy insulators of size approximate 50mm x 25mm x 25mm for fixing of roof/ down conductor complete with fixing screws etc. dully fixed in wall/ roof with PVC rawl plugs and fixing screws fixed as in repair complete all as specified and directed by engineer in charge.

Aluminium strip 25mm x 3mm for roof conductor and down conductor above ground fixed as in replacement, complete all as specified and directed by engineer in charge.

GI strip earth continuity conductor or main earthing lead of size 32mm x 6mm fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. fixed as in replacement, complete all as specified and directed by engineer in charge. Note : Insulators shall be measured and paid separately under respective items.

Copper strip 20mm x 3mm for roof conductor and down conductor above ground fixed as in replacement, complete all as specified and directed by engineer in charge.

GI strip earth continuity conductor or main earthing lead of size 25mm x 4mm fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. fixed as in replacement, complete all as specified and directed by engineer in charge. Note : Insulators shall be measured and paid separately under respective items.

12mm dia, 300mm long end termination aluminium rod fitted with rivets/ nuts & bolts on and including 32mm bore medium grade GI pipe 1.20m long duly grouted in PCC block of size 300mm x 300mm x 450mm built in PCC (1:3:6) type C-2 using graded stone aggregate fixed as in replacement, complete all as specified and directed by engineer in charge

Earthing complete with copper earth plate electrode 600mm x 600mm x 3.15 mm thick buried directly in ground (earth pit not less than 2.25mtr deep below ground level) with top edge of the plate not less than 1.5mtr below normal ground level connected to copper strip earth lead of size 20 x 3 mm by means of bolts, nut check nuts and washers of brass, earth strip protected by galvanized steel pipe 40 mm bore (medium grade) connected to test point all as shown in electrical plate No. 3 of SSR-Part I and including necessary excavation and earth work in any type of soil, 20 mm bore medium grade Gl pipe for watering, funnel with wire mesh, PCC (1:3:6), type C-1 chamber, pit cover of precast RCC (1:2:4), type B-1 reinforced XPM of weight riot less than 4 Kg/Sqm and taking out unserviceable earthing etc fixed as in replacement, complete all as specified and directed by engineer in charge. Notes:- (i) The unit rate includes copper strip upto 7.5 metre from earth plate) earth point/ test point. Qty required beyond 7.5 metre shall be measured and paid separately under respective item. (ii) Excavation & earthwork, PCC pit and cover, funnel with wire mesh, 20mm dia watering pipe, test point terminal and 40mm dia GI protection pipe shall be measured and paid separately under respective items. (iii) Old earthing may have been burried down to a depth of exceeding 2.25m below ground level. No extra payment will be made if excavation is done beyond 2.25m depth to retrieve the old earthing.

Aviation obstruction LED lights die cast aluminium housing with red polycarbonate dome, IP 65 protection, outdoor use type having driver suitable for operation on 100-270 V AC input supply 10-12 watt capacity single phase operation and suitable for mounting on 1/2" dia Gl pipe and electrical connections all as directed. Make Bajaj/JBI/Crompton/Havells. Note - These lights are to be replaced on hangar roofs/ high rise bldgs or masts using a Hydra of suitable capacity. Hiring charges for the hydra shall be measured and paid separately under respective item.