bids are invited for earthing plate 600 x 600 x 6 mm galvanised steel suitable for gi strip fittings drilled with 2 nos holes for 6 mm dia near one side , ci earth pit cover of size 300 x 300 x 6 mm with angle iron frame of size 20x20mm 3 mm thick with ms frame , funnel fitted with 20 mm diameter gi pipe 1 point 5 m long pipe make jindal or tata or kalinga , air termination single pointed aluminium rod 12 mm dia and 300 mm long , testing point terminal block made of gun metal and phosphorus bronze size 75 x 75 x 25 mm drilled and screwed including 3 nos 8 mm dia 25 mm long hexagonal head screw , aluminium strips 25 x 3 point 0 mm , galvanized iron strip 32 x 6 mm , insulating pvc block 75 x 75 x 30 mm with insulating clamp nut and bolt make presto or polycab or finolex , charcoal , salt normal , cement 43 grade opc packed in hdpe bag each 50 kg wt conform to is 8112 1989 make birla gold or ambuja or ultratech , coarse sand free from vegetation , coarse aggregate 20mm graded , coarse aggregate 40mm graded