81343 SPECIAL REPAIRS/REPLACEMENT OF LIGHTNING CONDUCTORS FOR P 180, P 153, P 20, P 72, P 73, P 35, P 169 AND P 19 AT KATTABOMMAN UNDER GE TIRUNELVELI

Amount

Taking down old rusted strip and supply and fix new aluminium strip of size 25 x 3.15 mm with saddles and fixing screws etc... for roof conductors and down conductors above ground level, strip to strip welding must be as required to the saddle insulator and are to be supported by PCC block at a distance of 1.8 Mtrs in each line complete all as specified and directed.

Taking down old rusted strip and supply and fix new copper strip of size 32 x 6 mm, buried in ground, complete all as specified and directed.

Taking down old rusted test point and supply and fix Test terminal block made of gun metal or phosphorous bronze of size 75 x 75 x 25 mm, drilled and screwed including 3 Nos. 8 mm dia, 25 mm long hexagonal head screws and depositing the old taken down material in the MES store yard complete all as specified and directed.

Material and labour for earthing complete with copper earth plate electrode 60 cm x 60 cm x 3.15 mm thick buried directly in ground (Earth pit not less than 2.25 mtr deep below GL) with top edge of earth plate not less than 1.5 Mtr below normal ground level, earth plate surrounded from all sides by 15cm thick and packed layer of charcoal dust and common salt filling in alternate layers and electrode connections by using copper earth strip 32 x 6 mm as earthing lead connected by means of bolts, nuts, check nuts and washer of copper, provision of 15 mm dia GI pipe light grade for protection of copper strip upto 7.5 meter long and 15 mm dia GI pipe light grade for watering arrangement and PCC (1:3:6) , type C1 chamber, GI funnel with wire mesh, test box, 50 mm thick RCC 1:2:4, type B1 earth pit cover with 6 Nos, 8 mm dia high strength deformed steel TMT bars on both ways including necessary excavation in any type of soil, returning, filling in, removal of surplus soil to distance not exceeding 50 metre, provision of charcoal and salt complete all as shown in Electrical plate No. 3 of schedule Part-I and connection to earth testing point and testing on completion complete all as specified and directed. Note: The unit rate quoted shall be deemed to include for Earth continuity conductor and GI protection pipe upto 7.5 meters.

Taking down old rusted Air termination rod and supply and fix Air termination single pointed aluminum rod, 12 mm dia and 300 mm long complete all as specified and directed.

Material and labour for 32 mm dia medium grade GI pipe of length not more than 2.5 meters alongwith necessary fittings for protection of earthing conductor including demolition of existing brick work/ concrete of size 300 x 300 x 350 mm and making good the same to match with the existing brickwork/concrete (as available on site) complete all as specified and directed. Note: The rate quoted is deemed to include for providing PCC (1:3:6) Type C1 using 20 mm graded aggregates or brick masonry work in CM (1:4) including necessary plastering, 10 mm thick in CM (1:6), well finished, so as to match with the existing surface available on ground, as well as removal of demolished debris outside the defence premises

SIRITEL SYSTEMS PRIVATE LIMITED