REPAIR REPLACEMENT MAINT OF EARTHING SYSTEM AND MISC WORKS IN DOMESTIC AND TECH AREA AT AFS THANJAVUR

Amount

Material and labour for Tripod (Delta) type maintenance free chemical earthing grid (comprising of three Nos chemical earthing) as per drawing attached (Sketch No - 01) the chemical earthing will have specification as follows:- (a) Copper electrode of wall thickness minimum 2mm not less than 3 mtr length with not less than 75mm outer dia total 03 Nos including copper strip of size 50 x 6mm minimum 2 mtr long 3 Nos connected /brazing with 75mm dia copper electrode and 25 x 3mm copper strip not less than 3 mtr long 3 Nos for inter connecting three 50 x 6mm copper earth strip complete as per drawing. (b) Fixing of copper earth electrode by drilling/ boring 175mm dia hole 5.00 mtr deep in any type of strata, placing electrode along with extention earth strip 50 x 6mm 2 mts long and mixing earthing soil resitivity improvement compound Gel min 10 KG per bore total 30 KG for 3 bores and 75 KG per bore total 225 KG for 3 bores soil resistivity improvement compound homogeneously as per manufacturer instruction. (c) FRP earthing display board 254 x 380mm made out of plasic material showing information related to type of earthing, earthing result, due date of testing along with fixing size 610mm height made of plastic hollow pipe of 20mm dia. (d) PCC earthing pit in PCC 1:2:4 type B-1 of internal size 300mm x 300mm x 300mm with 120mm thick wall and 700mm x 70mm x 150mm thick bed concrete and 50mm thick precast chamber cover of RCC 1:2:4 type B1 for reinfoced with welded steel wire fabric or XPM Jali (weight not less than 4.00 kg/Sqm), complete all as shown in electrical plate No -3 of SSR part - I complete. (e) Contractor must visit the site before quoting the tender to understand the difficulty and cost for carrying out the job in the station. It is important that contractor ascertain the quontum of work. (f) Contractor must produce the certificate from the manufacturer that chemical earthing has been carried out by manufacturer. The manufacturer must also issue the warranty for chemical earthing that Ohmic value of earth shall not increse more than 1 Ohm for five year. (g) Extension strip from electrode upto 0.15mtr height from GL to be deemed included in quted rate including brazing of all joints. Make:- Powertrac / Pragati / McML's Earthing Solution / Ashlock.

Supply and pouring Earthing soil resitivity improvement compound Gel (Power plus Gel) Enhancement compound transparent liquid Gel in 5 kg packing all as specified and directed by Engr In Charge. Make:- Powertrac / JJ Engineering / SM Infotech.

Material and Labour for providing earthing with GI earth plate electrode 600 X 600 X 6mm buried directly in ground (earth pit not less than 2.25M deep below ground level ) with top edge of the earth plate not less than 1.5M below ground level connected to GI strip 25 x 4mm thick for earthing lead fixed by means of nuts, bolt, washers etc connected to earth test point complete all as specified in electrical plate NO 3 of SSR1996 part 1 ,including necessary excavation and earth work in any strata of soil, GI water pipe with 20mm dia funnel &wire mesh PCC pit with CI cover and frame etc all as specified and directed. Note:- All the joints shall be made with welding to get proper conductivity.

Material and Labour 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 25 x 4mm GI strip including fixing arrangement like epoxy insulators on wall/pole etc. Note:- All the joints shall be made with welding to get proper conductivity.

Material and Labour for providing earthing with GI earth plate electrode 600 X 600 X 6mm buried directly in ground (earth pit not less than 2.25M deep below ground level ) with top edge of the earth plate not less than 1.5M below ground level connected to GI wire 4mm thick for earthing lead fixed by means of nuts, bolt, washers etc connected to earth test point complete all as specified in electrical plate No 3 of SSR1996 part 1 ,including necessary excavation and earth work in any strata of soil, GI water pipe with 20mm dia. funnel &wire mesh PCC pit with CI cover and frame etc all as specified and directed. Note:- All the joints shall be made with welding to get proper conductivity.

Material and Labour 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 4mm GI wire including fixing arrangement like epoxy insulators on wall/pole etc.

Material and Labour for providing earthing with copper earth plate electrode 600 X 600 X 6mm buried directly in ground (earth pit not less than 2.25M deep below ground level ) with top edge of the earth plate not less than 1.5M below ground level connected to copper strip 25 x 3mm thick for earthing lead fixed by means of nuts, bolt, washers etc. of copper / brass connected to earth test point complete all as specified in electrical plate NO 3 of SSR1996 part 1 ,including necessary excavation and earth work in any strata of soil, GI water pipe with 20mm dia funnel &wire mesh PCC pit with CI cover and frame etc all as specified and directed. Note:- All the joints shall be made with brazing to get proper conductivity.

Material and Labour 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 25 x 3mm copper strip including fixing arrangement like epoxy insulators on wall/pole etc.. Note:- All the joints shall be made with brazing to get proper conductivity.

Supply and pouring common salt commercial best quality complete all as specified and directed.

Supply and pouring charcoal dust/breeze best quality complete all as specified and directed.

Excavation in trenches in soft/loose soil not exc. 1.5 meter wide and not exc. 1.5 meter in depth and getting out for taking up / laying under ground electric cable or for pole etc complete all as specified and as directed.

Returning, filling in, including spreading leveling watering and well ramming in layers not exceeding 25 cms in depth in soft/loose soils complete all as specified and as directed.

Removing surplus soils to a distance not exceeding 50 mtr and depositing where directed at a level not exc. 1.5 mtr above the starting point all complete as specified and as directed.

M/S. SRI RAMANUJA CONSTRUCTIONS

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