SPECIAL REPAIR OF EARTHING PITS AT AF STATION JAIPUR

Amount

Excavation in trenches not exc 1.5 mtrs wide & not exc 1.5 mtrs in depth for taking out/laying of pipes/cables etc & getting out in soft loose soil complete all as specified and directed .

Returning, filling in trenches, including spreading, leveling, watering and well ramming in layers not exceeding 25 cm for Soft disintegrated rock complete all as specified and directed.

Removing excavated materials not exceeding 50 mtrs away and depositing where directed at a level not exceeding 1.5 mtrs above the starting point complete all as specified and directed .

Dismantling old earth plate of any type and removing to MES store for issue as schedule of credit complete all as specified and directed.

M&L for Earthing complete with galvanised steel earth plate electrode 60×60cm.× 6mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less'than 1.5 metres below normal ground level, connected to galvanised earth lead wire 4.0mm dia by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No. 3 connected to earthing test point all as specified or indicated including testing on completion. NOTE : (i) Earth resistance value should be less than 5 Ohms (ii) Item includes the cost of 7.5 m GI pipe for protection of earth strip.(iii) PCC pits shall be provided atleast 500 mm away from the pit and not on the earth pit itself and the extra cost of additional length of watering pipe, bends , elbows etc. shall be deemed to be included in the quoted rate. (iv) excavation and earth work shall be measured and paid separately.

Description all as iten no. 5.00 here-in-before but using galvanised iron strip 25×4mm as earthing lead. NOTE : (i) Earth resistance value should be less than 2 Ohms.

M&L for Maintenance free Earthing complete with copper pipe electrode, 50 mm bore, 2 metres length, buried directly and preferably vertically in ground with top edge not less than 1.25 metres below ground level connected with earthing lead of 25X3 mm dia copper strip all as specified and directed including testing on completion. NOTE : (i) Earth resistance value should be less than 1 Ohms.

Taking up or down 15mm bore steel tubing and connections, including cleaning for re-fixing of serviceable pipes and unserviceable pipe removal from site of work complete all as directed.

S&F for GI tubing 15mm dia bore medium grade with and including all fittings ISI marked and laid in trenches etc complete all as specified.

S & F 15 mm dia Stop valves, cast copper alloy, screwed down, high pressure, with crutch or butterfly handle, screwed both ends for iron pipe or for unions and fixed complete all as specified and directed.

S& F Earth continuity conductor or main earthing lead 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. as required 4 mm dia galvanised iron or steel wire complete all as specified and directed.

Description all as iten no. 11.00 here-in-before but 20x3mm copper strip.

shree shyam enterpises