replacement of slide by panel interlocking at irumpanam station of thiruvananthapuramdivision.bidding type normal tender .- provision of earth electrodes -supply and installation of class d - surge protection device for signal supply ( 110v ac / 24v dc supply ) between power and signaling equipment at location boxes complete with all connecting wires and cables. the spd has to be installed at location box duly providing suitable enclosure box and the spd is connected to bus bar of size 150mmx 25mmx 6 mm. the earthing provided for spd should also be connected to the bus bar. the connections to the bus bar is using copper nuts and bolts. the material required for the work such as class d - spd, enclosure for spd, bus bar of size 150mmx 25mmx 6mm, copper nuts and bolts etc shall be supplied by the contractor a. class - d 110v ac - 9 nos b. class - d 24v dc -. 9 nos. (inspection : consignee)
