bids are invited for repair, maintenance, and installation of plant/ systems/equipments (version 2) - bsnl exchange; electrical system or installation; service provider - supply & fixing of following plug points for raw power/ ups power for computers/ printers/ projector i/c interconnection wiring etc as reqd. [a] 5/6a piano type switch-2 nos & 5/6 a 3 pin sockets-2 nos with 4x7 or suitable size pvc gang box , 5/6a piano type switch-1 no & 5/6 a 3 pin socket-1 no with 4x4 or suitable size pvc gang box , supplying and drawing of following sizes of frls pvc insulated copper conductor, single core cable in the existing surface / recessed/ pvc conduit/ trunk box etc., as reqd. (for ups ckt, printer ckt) [a] 3 x 1.5 sqmm (individual ckts for light/ups/printer) , 2 x 6 sqmm (for ups input supply) , supplying and fixing of following sizes of medium class pvc conduit along with accessories in surface/recess including cutting the wall and making good the same in case of recessed conduit / painting of the surface conduit etc. complete as required. (bsnl approved make) [a] 20 mm