bids are invited for copper plate of purity not less than 90 percentage - 600mm x600mm x 3.15mm thickness , copper strip of purity not less than 90 percentage - at least25mm(width) x3mm (thickness) , copper solid rod lightning arrestor of purity not less than 90 percentage - copper solid rod 3 by 4 inch dia. x 4 feet , pvc insulated multi strand copper cable of purity not less than 90 percentage - 10 sq mm , pvc insulated multi strand copper cable of purity not less than 90 percentage - 50 sq mm , pvc pipe for earth pits - 40mm dia,10 feet length,5mm thickness , gi pipe with base plate - 50 mm dia, 03 mm thickness and 30 feet length gi pipe with supporting guy wires , common salt granular - about 1 -3cm granules , charcoal granular - about 1 -3cm granules , brazing of interconnection - brazing of all interconnection and joints of copper strips copper cables (approx 40 nos) of cns earthing systems and lightening arrestors , construction of inspection chamber - a 600mm x 600mm x 600mm (inside dimension) concrete box with smooth cement plaster finish shall be provided on top of the pit. a lid, cast iron earth pit cover painted black with pulling hooks shall be provided to cover the earth pits. , soil treatment - incase of rocky soil upon excavation, surrounding soil is to be replaced with black cotton soil as per requirement surrounding the 90 x 90 x30 cm pit of copper plate. , copper cable lugs - ring type lugs - 10 sq mm , copper cable lugs - ring type lugs - 50 sq mm , brass nut bolt with washer - 1.5 inch , copper equipotential earth bus bar of purity not less than 90 percentage - size 300 mm x 50 mm x 5mm thickness , gi cable tray with cover 300 mm width , cat6e utp cable , high-quality metallic rj45 connector with boot for cat6e cable - standard to support cat6e utp/stp cables, solid or stranded, 23 awg , layer-2 manageable 16-port rack-mountable network switch , adhesive anti static esd floor mat , 42 u rack , 32 amp double pole dc mcb , dc copper cable , dc cop