SPECIAL REPAIR AND REPLACEMENT OF EXISTING EARTHING WITH CHEMICAL EARTHING AND CERTAIN ALLIED E/M WORKS AT NHO, DEHRADUN

M&L for supply, installation, testing and commissioning of pure copper pipe electrode chemical earthing maintenance free earthing based on 6 mtr long copper pipe 80 mm dia(ID) with wall thickness of 3 mm, copper strip 32x 6 mm ( strip in pipe type electrode )and copper pipe electrode shall be filled with MFC for improvement of conductivity of electrode, 120 KGS approx of BFC shall be filled around the copper pipe elecrode . Rate included for testing,commisioning,earth work including checking of earth continuity and earth result complete all as specified and directed. Vendors are bound to get earthing result less than or upto1 Ohm with or without grid of earthings(Maximum number of new earthings in grid are restricted to 3 nos) Copper strip required for interconnection of earth pits in grid must be laid 2 ft below the ground level and the same must be treated with chemical (BFC) if required to achieve resistance value. Any additional work and material required to achieve the required result is included in the cost..Any additional work and material required to achieve the required result is included in the cost. Rate is included for boring of earthing in any type of soil/rock upto 200 mm bore.Continuity of good earth resistance shall maintained upto 1 year and testing will be carried out monthly by MES authority.Copper strip must be connected with copper pipe electrode and at other joints through nut bolt in addition to brazing complete all as specified and directed. (i) Earth strip from top connector of electrode to test point and further connection to LT panel/AF equipments/ for grid of earthing shall be measured and paid separately. (ii) Maximum no. of New earthings to be connected in grid are restricted to 03 Nos.

Material & labour for earthing complete with galvanised steel earth plate electrode 600x600x6mm thick burried directly in ground. ( earth pit not less than 2.25 mtr depth below ground level at any type of strata ) with top edge of the earth plate not less than 1.5mtr below normal ground level connected by GI strip 25x4 mm as earth lead by means of brass nuts and bolt,thimbles check nuts, washers including concrete chamber of PCC 1:3:6 type C-1 using 20mm graded stone aggregate with fair finish, internal surface of concrete chamber shall be given internal dia 300mm x300mm, 15mm thick plaster in CM 1:4 funnel with wire mesh, RCC pit cover of 320x320x80mm size (1:2:4) Type B1 using 20mm graded stone aggregate rainforced with XPM and charcoal, dust and common salt all as shown in electrical plate No 3 of MES SSR Part-1(2009) and specified including and provision of GI wire upto 7.5 mtrs long with 15 mm dia light grade Gi pipe protection and watering pipe of GI 20 mm bore, medium grade, including all excavation and earth work and connecting the earthing strip to panel, including testing on completion complete all as specified and directed by Engr-in-charge. Note:- (i) RCC pit cover shall be precast of RCC(1:2:4) type B1, 80mm thick rainforced with XPM weighting not less than 4kg/sqm in lieu of CI cover.(ii) Cost of additional GI wire more than 7.5 mtrs will be measured and paid seperately under relevant items.

M&L earth continuity strip or main earthing lead fixed to wall on battan or recess or chases or burried in ground or drawn in /pipe or fixed to pole or any other indicated situation for loop earthing etc, as required size 25mm X 4mm dia galvanised iron strip including down old complete all as specified and directed.

M&L earth continuity conductor or main earthing lead fixed to wall on battan or recess or chases or burried in ground or drawn in /pipe or fixed to pole or any other indicated situation for loop earthing etc, as required but 4mm dia galvanised iron or steel wire including down old complete all as specified and directed.

M&L for applying two coats of synthetic enamel paint over a coat of red oxide primer including preparation of old steel surface over 10cm width or girth, spray painting of approved quality / Shade including preparation of existing old painted surface of feeder pillar box/LT panel/any steelor iron surface as directed by Engr-in-charge of any description and indoor/outdoor type complete all as specified and directed.

Supplying, laying, jointing testing and connecting in replacement of XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) of cross sectional area 16 sqmm 4 Core with multistranded aluminum conductors, IS 7098 marked, suitable for LT 1100 Volt system, laid in trenches, fixed to pole, including jointing & testing including taking out old UNSV cable of any size complete all as specified and directed. Note :- Excavation, earth work ,cable protection, sand fillings , cable joint shall be measured and paid separately under respective items of schedule.

All as per item No.06 above but 25 Sqmm 3.5 core.

All as per item No.06 above but 35 Sqmm 3.5 core.

All as per item No.06 above but 50 Sqmm 3.5 core.

All as per item No.06 above but 70 Sqmm 3.5 core.

All as per item No.04 above but 95 Sqmm 3.5 core.

All as per item No.06 above but 120 Sqmm 3.5 core.

All as per item No.06 above but 185 Sqmm 3.5 core.

All as per item No.06 above but 240 Sqmm 3.5 core.

All as per item No.06 above but 300 Sqmm 3.5 core.

All as per item No.06 above but 400 Sqmm 3.5 core.

XLPE insulated, screened, PVC bedded,galvanised steel strip or wire armoured, electric H T power cables (heavyduty) with aluminium conductor, 11000 volts Earthed, grade cross sectional area 95 sq. mm 3 core complete all as specified and directed

Excavation in trenches in any type of soil and not exc 1.5 m wide and n.exc 1.5 m in depth for laying of cable and fixing poles, stays etc and getting out complete all as specified and directed

Returning , filling in including spreading leveling, watering and well ramming in layers not exceeding 25 cm thick with excavated soil complete all as specified.

Removing excavated material (surplus soil) to a distance not exceeding 50 mtrs and depositing where directed at a level not exc 1.5 m above the starting point all as specified and directed.

M&L for sand cushioning for under ground cable with layer of fine river dry sand 80 mm thick before laying of cable and 150 mm thick after laying of cable in trenches complete all as specified and directed. Note:- Punned (consolidated ) thickness of sand will be measured and paid.

M&L for well brunt bricks sub class 'B' in old size as cable protection laid flat width wise complete all as specified and directed.

Supply and laying in replacement GI tube light grade in trenches/wall for Cable Protection of 100 mm dia in size including all required fittings complete all as specified & directed.

Supply and laying in replacement GI tube light grade in trenches/wall for Cable Protection of 80 mm dia in size including all required fittings complete all as specified & directed.

Supply and laying in replacement GI tube light grade in trenches/wall for Cable Protection of 50 mm dia in size including all required fittings complete all as specified & directed.

Supply and laying in replacement GI tube light grade in trenches/wall for Cable Protection of 40 mm dia in size including all required fittings complete all as specified & directed.

Supply, fixing, testing and commissioning 630Amp onload change over 4 Pole, 415 V,complete with all standard accessories all as specified and directed by Engr-in-Charge.

Supply, fixing, testing and commissioning 400Amp onload change over 4 Pole, 415 V,complete with all standard accessories all as specified and directed by Engr-in-Charge.

Supply, fixing and testing MCCB 4 Pole, 415 V, Adjustable type, 160 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 4 Pole, 415 V, Adjustable type, 250 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 4 Pole, 415 V, Adjustable type, 400 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 4 Pole, 415 V, Adjustable type, 500 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 4 Pole, 415 V, Adjustable type, 630 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 4 Pole, 415 V, Adjustable type, 100 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 4 Pole, 415 V, Adjustable type, 400 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 3 Pole, 415 V, Adjustable type, 400 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 3 Pole, 415 V, Adjustable type, 630 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 3 Pole, 415 V, Adjustable type, 160 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 3 Pole, 415 V, Adjustable type,250 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

Supply, fixing and testing MCCB 3 Pole, 415 V, Adjustable type, 100 Amps with breaking capacity 36 KA complete with all connected accessories including taking out old UNSV MCCB from the existing panel after disconnecting all incoming and out going UG cable cannections etc complete all as specified and directed by Engr-in-charge.

M&L for PCC / road cutting for laying of pipe / cable exceeding 500 Sqcm & not exc 1000 sqcm in cross sectional area and making good with PCC 1:2:4 type B-1 using 20mm graded stone aggragate, complete all as specified and directed.

NOTES :- 1. For the items for which specifications not mentioned any where in the tender, the BIS specifications shall be followed.

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