CERTAIN REPAIRS TO EARTHING SYSTEM OF VARIOUS E/M INSTALLATIONS UNDER GE (AF) CHANDIGARH

Amount

Earthing complete with galvanised steel earth plate electrode 60cm x 60cm x 6mm thick buried directly in ground (earth pit not less than 2.25 Mtr deep below ground level ) with top edge of the plate not less than 1.5 Mtr below normal ground level, connected to galvanised earth lead strip 25mm x 4mm by means of bolts, nuts, check nuts and washers of GI or steel all as shown in electrical plate No. 3 of SSR Part-I connected to earthing test point all as specified or indicated and testing on completion as directed by the Engineer-in-Charge including necessary excavation & earth work in any type of soil, funnel, PCC chamber (1:3:6) type C-1, pit cover of precast RCC (1:1½:3) type A-1 using graded stone aggregate & reinforced with XPM weighing not less than 4 kg/ sqm and frame, charcoal, salt including earth lead protected by 40mm dia medium grade GI pipe and 20mm dia medium grade GI Pipe for watering including dismantling existing earthing complete all as specified and directed. Note:- Earth lead strip 25mm x 4mm and GI 40mm dia protection pipe upto 7.5 mtr length will be deemed to include in the unit rate quoted. Old earthing may have been burried down to a depth of exceeding 2.25m below ground level. No extra payment will be made if excavation is done beyond 2.25m depth to retrieve the old earthing.

Supply and fixing in replacement 25mm x 4mm GI strip earth continuity conductor or main earthing lead fixed to wall on batter or recess or chases or burried in ground of drawn in conduit/ pipe or fixed to poles or any other situation as required complete all as specified and directed.

M&L for replacement of aluminium strip 25mm x 3mm with saddles/ epoxy or porcelain insulators and fixing screws for roof conductor and down conductor above ground complete all as specified and directed.

Supply and fixing in replacement 32mm x 6mm GI strip earth continuity conductor or main earthing lead fixed to wall on batter or recess or chases or burried in ground of drawn in conduit/ pipe or fixed to poles or any other situation as required complete all as specified and directed.

M&L for replacement of copper strip 20mm x 3mm with saddles/ epoxy or porcelain insulators and fixing screws for roof conductor and down conductor above ground complete all as specified and directed.

Note for item No. 2.00 to 5.00: Quoted unit rates shall be deemed to include for drilling of holes in the strip including provision of nuts, bolts, washers etc. required for jointing and no extra payment shall be made on this account.

Earthing complete with galvanised steel earth plate electrode 60cm x 60cm x 6mm thick buried directly in ground (earth pit not less than 2.25 Mtr deep below ground level ) with top edge of the plate not less than 1.5 Mtr below normal ground level, connected to galvanised earth lead strip 32mm x 6mm by means of bolts, nuts, check nuts and washers of GI or steel all as shown in electrical plate No. 3 of SSR Part-I connected to earthing test point all as specified or indicated and testing on completion as directed by the Engineer-in-Charge including necessary excavation & earth work in any type of soil, funnel, PCC chamber (1:3:6) type C-1, pit cover of precast RCC (1:1½:3) type A-1 using graded stone aggregate & reinforced with XPM weighing not less than 4 kg/ sqm and frame, charcoal, salt including earth lead protected by 40mm dia medium grade GI pipe and 20mm dia medium grade GI Pipe for watering including dismantling existing earthing complete all as specified and directed. Note:- Earth lead strip 32mm x 6mm and GI 40mm dia protection pipe upto 7.5 mtr length will be deemed to include in the unit rate quoted. Old earthing may have been burried down to a depth of exceeding 2.25m below ground level. No extra payment will be made if excavation is done beyond 2.25m depth to retrieve the old earthing.

S&F in repairs porcelain/ epoxy insulators of size approximate 50mm x 25mm x 25mm for fixing of roof/ down conductor complete with fixing screws etc. dully fixed in wall/ roof with PVC rawl plugs and fixing screws complete all as directed.

Supply and fixing in replacement 12mm dia, 300mm long end termination aluminium rod fitted with rivets/ nuts & bolts on and including 32mm bore medium grade GI pipe 1.20m long duly grouted in PCC block of size 300mm x 300mm x 450mm built in PCC (1:3:6) type C-2 using graded stone aggregate complete all as specified and directed.

M&L for MS work as in repairs electrical panel doors fabricated from MS sheet as per existing gauge /size and shape and fixed with hinges by properly welding and checking for proper closing and opening complete all as specified and directed.

M&L for refixing existing panel doors by welding the hinges with panel body properly and fixing the panel door with hinges by welding or as per existing arrangements and checking for proper opening and closing of the door all as directed. Note: Repairing and refixing of one door panel fitted with 2/3 hinges shall be considered as one job. Any small piece of MS sheet of thickness 2/3mm required for repairing the portion of the door to be fixed with hinges and replacing any damaged MS hinge shall be deemed to be included in the unit rate quoted.

M&L for complete removal of existing paint from panel doors by paint removers or burning off by blow lamps and cleaning with scrapers and applying two coats of synthetic enameled paint over a coat of red oxide primer complete all as specified and directed.

Earthing complete with galvanised copper earth plate electrode 60cm x 60cm x 3.15mm thick buried directly in ground (earth pit not less than 2.25 Mtr deep below ground level ) with top edge of the plate not less than 1.5 Mtr below normal ground level, connected to copper earth lead strip 20mm x 3mm by means of bolts, nuts, check nuts and washers of GI or steel all as shown in electrical plate No. 3 of SSR Part-I connected to earthing test point all as specified or indicated and testing on completion as directed by the Engineer-in-Charge including necessary excavation & earth work in any type of soil, funnel, PCC chamber (1:3:6) type C-1, pit cover of precast RCC (1:1½:3) type A-1 using graded stone aggregate & reinforced with XPM weighing not less than 4 kg/ sqm and frame, charcoal, salt including earth lead protected by 40mm dia medium grade GI pipe and 20mm dia medium grade GI Pipe for watering including dismantling existing earthing complete all as specified and directed. Note:- Copper earth lead strip 20mm x 3mm and GI 40mm dia protection pipe upto 7.5 mtr length will be deemed to include in the unit rate quoted. Old earthing shall be conventional type and may have been burried down to a depth of exceeding 2.25m below ground level. No extra payment will be made if excavation is done beyond 2.25m depth to retrieve the old earthing.

Supply and fixing in replacement LED street light fitting 90 Watt 230V AC outdoor type with high pressure die cast aluminum housing and heat resistant complete with driver, lamp bracket with impact and corrosion resistant including thermal management in multiple optics complete with IP 65/ 66 protection complete all as specified and directed.

Supply, laying, jointing and testing LT XLPE cable insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 volts grade with stranded aluminium conductor of size 95 sqmm 3½ core laid in trenches/ passing through GI tubing etc. including taking out existing LT XLPE cable complete as specified and directed.

Supply, laying, jointing and testing LT XLPE cable insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 volts grade with stranded aluminium conductor of size 35 sqmm 3½ core laid in trenches/ passing through GI tubing etc. including taking out existing LT XLPE cable complete as specified and directed. Note for item No. 14.00 & 15.00:- Excavation & earth work, sand cushioning and brick protection shall be measured and paid for separately under appropriate item of this BOQ.

M&L for installation, testing and commissioning of maintenance free chemical earthing using 40mm dia 3.00m long GI earthing electrode capsule and comprising the following including dismantling of old conventional earthing complete all as specified and directed:- (a) Making a hole of 150mm dia to a depth of 3.50m below ground level and placing earthing electrode inside the hole. (b) Filling back fill earth enhancing compound of superior quality (Qty approx 50Kg) properly mixed with all around the earthing electrode. (c) Continuously compacting the back filling compound to form a uniform mixture all around the earthing electrode. (d) Construction of brick masonry earth pit of internal size 30cm x 30cm x 30cm with half brick thick wall including 15mm thick internal plaster in cement mortar (1:4) finished even and smooth and providing CI cover with frame over the pit. (e) Testing the earthing for earth resistance. Earth resistance should not be less than 5Ohm. In case the test results are not found below 5Ohm, complete earthing shall be re-done without any extra cost to the Govt. Note:- Old earthing shall be conventional type and may have been burried down to a depth of exceeding 3.50 below ground level. No extra payment will be made if excavation is done beyond 3.50 depth to retrieve the old earthing.

M&L for replacement of test point terminal block of gun metal or phosphorus bronze of size 75mm x 75mm x 25mm drilled and screwed including 3 No. 8mm dia 25mm long hexagonal head screws complete all as specified and directed.

S&F in repairs earthing pit indicator made out of 3mm thick MS sheet of size 300mm x 200mm with 25mm x 4mm angle iron stand 600mm long, duly painted with two coats of synthetic enameled paint over a coat of red oxide primer and writing work in capital letters & numbers fixed in and including PCC (1:4:8) block of size 30cm x 30cm x 30cm complete all as specified and directed.

Supply of copper sulphate (CuSO4) and pouring into earth pit after mixing with water complete all as specified and directed.

Supply of magnesium sulphate (MgSO4) and pouring into earth pit after mixing with water complete all as specified and directed.

Supply of common salt and pouring into earth pit after mixing with water complete all as specified and directed. Note for item No. 19.00 to 21.00:- Excavation/ earth work required for filling the above items shall be deemed to be included in the unit rate quoted and no extra payment will be made on this account.

M&L for dismantling existing damaged earthing pit chamber and construction of new earth pit in PCC (1:3:6) Type C-1 using graded stone aggregate including provision of funnel with wire mesh all as shown in electric plate No. 3 complete all as specified and directed. Note: Cover for earth pit will be measured and paid for separately.

M&L for replacement of earthing pit cover of size 60cm x 60cm x 5cm thick casted from RCC (1:1½:3) type A-1 using graded stone aggregate reinforced with 8mm dia TMT bars @ 100mm c/c including provision of two No. 200mm long lifting handles of 10mm dia round bars complete all as specified and directed.

Cleaning the earth pit from inside and outside upto 01 mtr radius all around by removing vegetable grass, shrubs etc. and dressing the soil complete all as specified and directed.

Excavation in trenches in soft/ loose soil not exceeding 1.5 mtr wide and not exceeding 1.5 mtr in depth for foundation of pole, laying of cable etc. and getting out complete all as specified and directed.

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

Removing excavated surplus soil to a distance not exceeding 50 mtrs and depositing where directed at a level not exceeding 1.5mtrs above the starting points complete all as specified and directed.

M&L for sand cushioning to cables with a layer of sand 8cm deep before laying the cable and 15cm depth after laying & stretching of cable) complete all as specified. Note: Punned thickness overall 18cm shall be measured & paid.

Supply and laying old size sub class ‘B’ bricks as in protection of cable laid dry flat perpendicular to direction of cable abutting each other complete all specified and directed.

R D Bansal

PARTAP ENGINEERING WORKS

SANJEEV ENTERPRISES

Bharat Enterprises