CWE(BHI)/BHI-50/2022-23

Amount

Material & labour for earthing with Galvanised Steel earth plate electrode 60cm x 60cm x 6mm thick buried directly in ground vertically at a depth not less than 2.25metre below normal ground level with top edge of earth plate at a depth not less than 1.5 metre below normal ground level, earth plate surrounded from all sides by 15cm thick packed layer of charcoal dust and common salt filling in alternate layers and electrode connections by using Galvanised Iron strip of 32 x 6 mm as earthing lead (upto the body of the equipment) by means of bolts, nuts, check nuts and washers made of galvanised iron and thimbles and protected by light grade 40mm dia GI pipe connected up to main LT Panel /Test point and GI pipe medium grade 20mm bore for watering and including funnel , wire mesh , RCC pit cover and PCC chamber pit with PCC (1:3:6) type C-2 using 40mm graded stone aggregate, including excavation and earth work in any type of soil , returning , filling in approved soil and disposal of surplus soil to a distance not exceeding 50m all as specified and shown in electrical plate No 3 of SSR 2020(Part-I) complete all as specified and directed.Note: Earth pit should not be slide down and upto 7.5 mtr earthing strip and GI protection pipe is included in item.The test result of each earthing is less than 5 Ohm.

M&L for commissioning, installation and testing of maintenance free UL approved copper bonded earth rod of 10 feet length, 17.2 mm dia. made of high tensile low carbon steel rod , molecularly bonded with 99.9% electrolytic grade copper on outer surface ( minimum copper bonding thickness - 250 microns) with exothermally jointed copper bus bar of 50 X 6 X 200 mm for connection. The rod and exothermic joint together successfully tested at 25 KA fault current by CPRI with 50 Kg eco friendly earth enhancing compound with each earth rod. The earth pit should be 125 mm dia. the compound should comply to IEC:62561-7 having passed leaching, corrossion, sulphur and resistivity test as per IEC: 62651-7 by NABL accredit Lab with locked lid CI pit cover and PCC chamber pit with PCC (1:3:6) type C-2 using 40mm graded stone aggregate, including excavation and earth work in any type of soil , returning , filling in approved soil and disposal of surplus soil to a distance not exceeding 50m of top size lockable Lid. It includes GI Protection pipe light grade of size 40 mm dia. with copper strip of size 32X6 mm upto test point complete all as specified and directed by Engr-in-charge. Including connection of Strip between two earthing complete all as specified and directed by Engr in charge. Note: Earth pit should not be slip down and 7.5 mtr earthing strip and GI protection pipe is included in item. (a) The test result of each set of earthing is less than 1 Ohm. All earthing test will be carried out in presence of MES Rep, manufacturer Rep and test result will be recorded in a register with sign of manufacturer & Engr-in-charge. (b) Earth enhancing compound (PROCEM) ECS GB 25 tested as per IEC 62561-7-25Kg (c) Chemical earthing will be installed by manufacturer Rep and purchase voucher of earthing will be produced before payment. Payment shall be made only after getting satisfactory result.

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 32x6 mm galvanised iron strip as earthing lead on PVC/percelain insulator at suitable distance with saddles and fixing screw etc.complete all as specified & directed

S&F of copper strip of size 32x6 mm on PVC/porcelain insulator at suitable distance with saddeles and fixing screw etc for roof/Wall conductors and down conductors above ground all joints of copper strip should be brazed properly complete all as specified and directed.

S&F test point terninal block made of of gun metal or phosphorus bronze size 75x75x25mm drilled and screwed inlcuding 3 Nos 8 mm dia 25 mm long hexagonal head screw complete all as specified and directed.

M&L for tube light grade galvanised 40 mm dia size for the protection of the earthing strip on wall/roof with the help nuts ,bolts clamps, PCC work etc as directed at site by Engr-in-charge.

M&L for making bore below the road for crossing the GI pipe light grade 40 mm dia for cable protection and fill the putty on both sides of the GI pipe after crossing the armoured cable to avoid the water inside complete all as specified and directed by Engr-in-charge.

Aman Enterprises

R K GOYAL & COMPANY

Rasvinderpalandco