PROVN OF RING MAIN SYSTEM OF HT 11 KV UNDERGROUND CABLE FROM HANGAR SUBSTATION TO BASE OPS SUB STATION AT AF STATION CARNICOBAR

Amount

Excavation in trenches not exc. 1.5 m wide and not exc 1.5 m deep in soft/loose soil) for laying of cables or GI pipe and getting out including levelling of bottom surface to required level complete all as specified and directed

Returning filling in and including spreading, levelling, watering and well ramming soil in layers not exceeding 25 cm thick all as specified and directed.

Removing excavated material (i.e. soil) from site to a distance n. exc 50 m away and depositing where directed at a level n. exc. 1.5 m above the starting point complete all as specified and directed

Demolition of path / Plain Cement concrete in ground floors and paving's n exc 15 cm thickness (below or above ground level) .complete all as specified and as directed.

M/L for cement concrete type B-2, 1:2:4 (40mm graded aggregate) 150mm thick finished fair & even complete all as specified and as directed.

Supply and Fixing XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy-duty) with aluminium conductor, 11000 volts, grade 3 cross sectional area 95 sqmm Complete all as specified and directed by Engineer-in-Charge.

Supply and laying double wall corrugated pipe (DWC) conforming to IS 19430 Part - I of size 160mm outer dia and 136 mm inner dia complete all as specified and as directed

Supply and lay GI pipe light grade as cable protection laid on trench/floor/road/path, fixed on pole/wall etc of size 80 mm dia all as specified and directed.

Supply, laying, testing and commissioning Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm

Supply, laying, testing and commissioning Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm all as specified and directed by Engineer-in-Charge.

Supply and fix Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm 3 core all as specified and directed by Engineer-in-Charge..

Supply and fix air break switch gang operated triple pole mechanically operated mechanism, switch air break gang operated mounted on 15 Nos insulator and steel frame with operating rod of 25 mm bore GI Pipe and locking arrangements worked from ground level for current rating 200 Amps, HT 11 KV grade including drop out fuses and necessary silver coper coating jumpers and making all electrical connections complete all as specified and directed by Engineer-in-Charge.

Earthing complete with galvanised steel earth plate electrode 60 cm x60 cm x 6 mm thick buried directly in ground ,(Earth pit not less than 2.25 meter deep below ground level) with top edge of plate not less than 1.5 meter below normal ground level ,connected to and including galvanised iron earth wire 32 X 6 mm by means of nut, bolts, check nuts and washers of galvanised iron or steel and provision of charcoal dust and common salt packed all around the earth plate including necessary excavation and earth work in any type of soil and testing complete all as specified and directed and shown in electrical plate number 5 of MES SSR part-I(1991) (a) Excavation and earth work for drilling hole for electrode in any type of Soil. (b) PCC pit in cement concrete 1:2:4 type B-1, Pre cast RCC cover with suitable handle 40 mm thick in PCC 1:2:4 type B-1, reinforced with welded steel wire fabric weighing not less than1.87 Kg/ Sq. meter. (c) Funnel with watering pipe of GI 20 mm nominal bore light grade and lugs etc complete all as specified and directed (d) 15 mm nominal bore medium grade GI protection pipe 5 meter long for protection of earthing lead complete all as specified and directed. (e) Requisite quantity of common salt and charcoal. (f) Testing of earthing.

M &L Cable rout indicator comprising of CI wiser of size 100mm dia embossed as HT power cable fixed to MS angle iron of size 50x50x6mm graded stone aggregate of block size 300x300x450mm including two coats of aluminium paint over a coat of aluminium red oxide primer including necessary earth work complete all as specified and directed.

Material and labour for spreading of stone aggregate of nominal size not more than 63/40mm under 4 pole HT structure /surrounding area of manually without damaging any equipment's, cable or parts , spreading & levelling of finished gravel uniformly in layers and rammed to true surface all as specified and directed

N Rathinam

CHANDER SEKER ENTERPRISE

SKV Engineering