PROVN OF EXTERNAL ELECTRIC CONNECTION FOR CONSTR OF CWTS AT TRG BN MRC UNDER GE SAUGOR

Supply, laying, connecting & testing HT Aluminium cable XLPE insulated screened pre bedded galvanized steel strip armoured electric power cable with stranded aluminium conductor 11 KV grade of size 3 Core 95 Sqmm complete all as specified and directed.

Excavation in trenches not exceeding 1.50m wide and not exceeding 1.50m depth for foundation, laying of cables/pipes/poles etc., and getting out in hard/densesoil complete all as specified and directed.

Ditto item no 2 above but Exc 1.50 but n.exc 3.0m deep complete all as specified and directed.

Returning filling in including spreading levelling watering and well ramming in layers not exceeding of 25 cm thick in soft/loose soil complete all as specified and directed

Removal of surplus soil as obtained from excavation to a distance not exc. 50 Mtr and depositing where directed at a level not exc. 1.5 Mtr above the starting point complete all as specified and directed.

Supply and laying dry river sand for cable cushioning in trenches to required width at bottom and top of cable including spreading levelling watering and consolidation complete all as specified and directed. Note:-Punned thickness only shall be measured and paid separately

Supply and laying class HV, Type 1, flat, size 300mm x 180mm x 40 mm unreinforced precast cable cover as the mechanical protection to cable laid in trenches flat complete all as specified and directed by Engineer-in-charge.

Supply and laying Class LV, Type I, flat, size 250 mm x 150mm x 40mm unreinforced precast cable cover as the mechanical protection to cable laid in trenches flat complete all as specified and directed by Engineer-in-charge.

S&F in HT cable route indicator made of RCC M15 (Nominal Mix) using 12.5mm nominal size crushed stone aggregate of size 200 mm(Length) x 200mm (Width) x 1200mm (Height) duly painted with cement base and written in white colour with lettering MES HT cable/HT Straight joint using two coats of synthetic enamel paint in black colour and including neccesary earthwork and excavation, embedded in PCC M15(Nominal Mix) using 20 nominal graded crushed stone aggregate of size 400mm x 400mm x 300mm complete all as specified and directed.

S & F gang operated air break switch with DO fuse assembly, three poles, outdoor type, nominal system voltage 11 KV, rated voltage 12 KV, rated normal current 200 Amps, rated frequency 50 Hz, rated one minute power frequency withstand voltage between (i) earth & poles 28 KV (rms) (ii) across the isolating distance 32 KV (rms), rated lightning impulse withstand voltage (i) to earth and between poles 75 KV (Peak) (ii) across the isolating distance 85 KV (Peak), Rated short-time withstand current 25 KA for 3 seconds, rated peak withstand current 63 KA for climatic conditions at the site, mechanically operated mounted on insulator and steel frame with operating mechanism worked from ground level for current complete all as specified and as directed.