supply of supply, fitment and erection of 50mm dia, 3.6mm thickness and 03 meter long gl pipe for earthing including construction of earth pit, rcc earth cover slab 0.5 thick and earth continuity by 6swg, gi wire, gi nut bolts etc as per direction of engineer-in charge at site. , supply, fitment and erection of 50mm dia, 3.6mm thickness and 03 meter long gl pipe for ea rthing including construction of earth pit, rcc earth cover slab 0.5 thick and earth continuity by 6swg, gi wire, gi nut bolts etc as per direction of engineer-in charge at site. [ warranty period: 30 months after th e date of delivery ] ] , supply of different types of electrical items suitable for electrical maintenance and measure ment as per attached annexure. [ warranty period: 30 months after the date of delivery ] ]