SPECIAL REPAIRS/REPLACEMENT OF LT POLES AND ALLIED WORKS AT EXPLOSIVE AREA AND TECHNICAL AREA

Amount

Material & Labour for Earthing with copper earth plate of size 600x600x3.15 mm thick buried directly in ground not less than 2.25 metre below ground level, earth plate paced on all side with charcoal mixed with salt to a thickness of 150 mm in layers, connected by copper strip of size 20x3 mm thick, soldered and riveted to earth plate. Copper earth strip will be protected by using 40mm bore GI pipe (light grade). The earthing includes PCC pit chamber, RCC pit cover and frame, watering pipe 20 mm bore, funnel with wire mess with necessary earth work including disposal of surplus soil to a distance not less than 50 metre complete all as specified and shown in electrical plate No 3 of SSR Part I - 2009 including dismantling old earth plate complete all as specified and directed. Note: - Main earthing lead from earth plate to test point & up to 7.5 Metre to be provided. The cost for the same shall be deemed to be included in the above quoted rate.

Supply & Fix Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required Copper earth strip 20 x3 mm with saddles/fasteners/insulators and fixing screws etc including taking down old one complete all as specified and directed.

Material & Labour for Earthing with GI earth plate of size 600x600x6 mm thick buried directly in ground not less than 2.25 metre below ground level, earth plate paced on all side with charcoal mixed with salt to a thickness of 150 mm in layers, connected by GI strip of size 32x6 mm thick, soldered and riveted to earth plate. GI earth strip will be protected by using 40mm bore GI pipe (light grade). The earthing includes PCC pit chamber, RCC pit cover and frame, watering pipe 20 mm bore, funnel with wire mess with necessary earth work including disposal of surplus soil to a distance not less than 50 metre complete all as specified and shown in electrical plate No 3 of SSR Part I - 2009 including dismantling old earth plate complete all as specified and directed. Note: - Main earthing lead from earth plate to test point & up to 7.5 Metre to be provided. The cost for the same shall be deemed to be included in the above quoted rate.

Supply & Fix Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc, as required GI earth strip 32x6 mm with saddles/fasteners/insulators and fixing screws etc including taking down old one complete all as specified and directed.

Ditto All as per item No 03 but using galvanised Earth plate of 600x600x6mm with iron strip 25x4mm as earthing lead.

Ditto all as per item No 04 here above but GI strip 25x4mm buried in ground or on wall/pole etc including taking down old one complete.

Material & Labour in replacement of test terminal block made of gun metal or phosphorus bronze size 75mmx75mmx25mm drilled and screwed including 3 Nos 8mm dia 25mm long hexagonal head screws including taking down old one complete all as specified and directed.

Material & Labour 40mm bore galvanised steel tubing, Light grade, fixed on the top of the roof with socket/clamps or by welding etc, for fixing single point air termination rod for lightening conductor support as required at site including removing of the old rusted pipe complete as specified and directed.

Ditto as per Sl item No 08 but for 50mm dia bore.

Material & Labour for steel tubular swaged poles complete with cast iron base plate, final tapper plug, bolt, nuts and screws as specified type 410 SP-31, 9 metre long and applying one coat of aluminium paint over a coat of red oxide zinc chromate primer including dismantling old one complete all as specified and directed.

Ditto as per Sl item No 10 but for SP 55 of 11 metre.

Supply & Fix in replacement of air termination single pointed copper rod 12mm dia 300mm long for lightning protection complete all as specified and directed.

Supply & Fix in replacement of air termination single pointed aluminium rod 12mm dia 300mm long for lightning protection complete all as specified and directed.

Material & Labour for stay assembly complete with accessories comprising 20mm dia galvanised stay rod threaded end with nut 215cm long, 6mm thick MS stay plate of size 300x300mm, 2 Nos galvanised bolts, all as shown in electrical plate No 1 of SSR Part 1 and taking out old stay assembly complete all as specified and directed. (Excavation, PCC and insulator and stay wire will be measured separately).

Supply & Fix in replacement of galvanised stay wire of size 7/2.5 mm as required at site including necessary clamps, nut and bolts complete to hold the existing lightning arrestor pole in position complete all as specified and directed.

Material & Labour for stringing aluminium conductor steel reinforced on tubular poles as suspension conductor for lightening protection system including removing of the existing old conductor complete all specified and directed.

Supply & Fix in repair Loop type insulator, vitreous porcelain, white, brown or green, Small size, with overall dimensions 65x90mm, clearance of hole 16mm complete all as specified and direcetd.

Excavation in trenches not exceeding 1.5 metre wide and not exceeding 1.5 metre in depth for foundation, laying of pipes, cables, etc, or for shafts, wells, cesspits, manholes, pier holes, etc, not exceeding 10 sqm on plan and not exceeding 1.5 m in depth and getting out soft/loose soil complete all as specified and directed.

Ditto All as per Sl Item No. 18, but exceeding 1.5 metre and not exceeding 3.0 metre in depth.

Returning filling in including spreading, leveling watering and well ramming in layers not exceeding 25cm complete all specified and directed.

Removing excavated material not exceeding 50 Metre and depositing where directed at a level not exceeding 1.5 Metre above the starting point complete all specified and directed.

Material and Labour for PCC 1:3:6 type C-1 using 20 mm graded crushed stone aggregate for erecting of Stay rod, filling and mass concrete etc all as specified and directed by Engineer-in-Charge

Material and Labour for PCC 1:2:4 type B-1 using 20 mm graded crushed stone aggregate for coping of pole, filling of road cutting and mass concrete etc all as specified and directed by Engineer-in-Charge

Supply & Fix single phase surge protection device type 1 & 2 tested for lighting impulse current 10/350 micro second 50 ka for phase to neutral and 125 ka for neutral to earth, surge protection device tested for nominal discharge current 8/20 micro second 20 ka phase to neutral voltage protection level,<=1.4kv, encapsulated spark technology for line to neutral for type 1 and metal oxide for arrestor for type 2 line to neutral, LED indication in line to neutral pole in type 1 and flag indication in type 2 line to neutral, response time for type 1 is less than 100 nano second and type 2 is less than 25 nano second, DIN Rail mounted complete all specified and directed.

Taking down and refixing of serviceable earth continuity conductor of any type and any size with and including saddles/fasteners/insulators and fixing screws etc, complete all as specified and directed.

Taking down and refixing of serviceable air termination single pointed rod of any type and any size with and including nut, bolts or by welding as required at site complete all as specified and directed.

Amount of Credit Schedule shall be deducted to arrive the Contract Sum.

Powertech Engineers