REPAIR REPLACEMENT OF OLD UNSERVICEABLE EARTHING PITS LIGHTENING ARRESTER AND MISC WORK AT DALHOUSIE AND BAKLOH CANTT

Amount

Supply & fixing in repairs/replacement air termination single pointed aluminium rod 12 mm dia and 300 mm long with necessary fixing arrangement on blocks on roof, all as specified and directed.

Supply & fixing in repairs/replacement air termination single pointed copper rod 12 mm dia and 300 m long with necessary fixing arrangement on blocks on roof, all as specified and directed.

S & F copper strip 20 mm x 3.15 mm buried in ground for earth continuity conductor or fixed to porcelain, insulator fixed to wall as in repairs, complete all as specified and directed.

complete all as per item no 3 above but of 25x3.15mm.

Removing & refixing of air termination single pointed aluminium rod 12 mm dia and 300 mm long by tightening with necessay fixing arrangement fixed on existing/new PCC blocks on roof and making good complete all as specified and directed.

Removing & refixing of air termination single pointed copper rod 12 mm dia and 300 mm long by tightening with necessay fixing arrangement fixed on existing/new PCC blocks on roof and making good complete all as specified and directed.

S & F aluminium strip of size 25 x 3.15 mm fixed with suitable saddles & fixing screw etc on roof with rubber & bitumen washer & fixed to insulator on wall for down conductor as fixed in repairs, complete all as specified and directed

complete all as per item no 07 above but GI strip of 25x4mm on wall/surface for conductors or as earth continuity conductor all as specified and directed.Note for item No. 07 to 08 :- Porcelain Insulator & PCC required shall be measured and paid for separately under relevant items of Sch

S & Fix in repair GI strip 25mm x 4 mm burried in ground for loop earthing and ground grid including excavation and earth work in any type of soil complete all as specified and directed.

S & F test point terminal block made of gun metal or phosphorus bronze size 75 x 75 x 25 mm thick drilled and screwed including 3 Nos 8 mm dia 25 mm long hexagonal head screws fixed to GI strip bracket fixed to porcelain insulator in wall as in repairs, complete all as specified and directed Note :- Porcelain insulator will be measured & paid for separetly.

S & F vitreous china porcelain insulator with busbar support white type, complete all as specified and directed

Re fixing in repair only aluminium strip of size 20/25 mm x 3.15 mm fixed to procelain insulator fixed with suitable saddles & fixing screws etc for roof with rubber & bitumen washer & fixed to insulator only on wall for down conductor, complete all as specified and directed

Re fixing in repair only copper strip of size 25 mm x 3.15 mm fixed to procelain insulator fixed with suitable saddles & fixing screws etc for roof with rubber & bitumen washer & fixed to insulator only on wall for down conductor, complete all as specified and directed

M & L for testing of Lightning Conductor & earthing except new earthing 15 & 16 here-in-after of various location in the presence of users representative & Engineer-in-Charge & maintaining record of tests for lightning conductor as per IAFW -2215 by removing all connection and the resistance of earthing & lightning protection network should not exceed 5 Ohm in every technical building showing the details of defective earthing & lightening protection system. Items to be repaired/renewal during record of sets for lightening conductors as per IAFW 2215 & also test results to be recorded after repair/renewal and should be signed by users also Note :- (i) The earthing showing result beyond 10 ohm to be renewed and shall be measured & paid for separately under relevant item of Sch 'A'. (ii) The test result after renewal of earthing and replacement of defective conductor also be recorded in earthing test book as per IAFW-2215 for lightening conductor & cost for the same is deemed to be included in unit rate of above item. (iii) The unit rate quoted shall be deemed to be included for the test results of all existing earthing point, date of testing and renewal etc to be written on wall of each building in clear format like stenzil etc as per direction from engr-in-charge with out any extra cost. (iv) The testing of new earthing covered under item Nos 15 & 16 are not covered in this item.

M & L earthing complete with GI earth plate electrode of size 60 cm x 60 cm x 6 mm thick burried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edge of the plate not less than 1.5 m below the normal ground level connected with GI strip 32 x 6 mm by means of bolts, nuts, check nuts & washers of galvanished iron steel including necessary excavation and earth work in any type of soil, removing surplus soil to a distance not exc 50 m, with and including PCC chamber in PCC (1:2:4) , type B1, using (20 mm graded stone aggregate), mild steel angle iron frame made out of MS angle iron of size 40x40x6 mm thick duly painted with two coats of synthetic enamel paint over one coat of red oxide zinc chrome primer hinged with and including 6mm thick CI cover with handle, watering arrangement with funnel internally secured with wire mesh with 20 mm dia medium grade pipe for watering ,40 mm dia light grade GI pipe for lead protection in & including alternate layers of charcoal dust and common salt complete all as shown in electrical plate No 3 of SSR Part-1(2009) connected to earthing test point all as specified and indicated including testing on completion

-Ditto- all as per srl item No. 17 hereinbefore, but with copper earth electrode of size 60 cm x 60 cm x 3.15 mm thick & earth continunity lead of size 20 mm x 3 mm copper strip, complete all as specified and directed 'Note :-for item No. 15 & 16 :- (i) copper strip upto 7.5 m will be deemed to be inluded in quoted rate of item No. 15 & 16 respectively. (ii) The earth chamber shall be constructed 50 cm away from the edge of earth pit & the cost of the same is deemed to be included in rate quoted for above items.(iii) The rates quoted for item Nos 15 & 16 are also deemed to be included for cost of new test point as specified.

Supply and installation a set of maintanance free earthing system consisting of 04 number of copper bonded earth rod with welded clamp of 17.2mm dia x 2 mtr length with coated with 250 micron electrolytic grade copper tested on 25 KA fault current by CPRI with driving head and tip to directly drive the earth rod to the ground with each rod including interconnected with 25x3.15mm copper strip at the interval of 2mtr to form a square, including back fill compound (LOHM) complies with IEC-62561-7 composed of bentonite, aluminium oxide, iron oxide, graphite, activated carbon, carbon sulphate etc approx 20 Kg for each rod pouring with temporary support of 100mm dia pipe after filling of chemical compound pipe has been taken out complete all as specified and directed by Engr-in-charge. NOTE:-The rate includes copper strip interconnected with rod to make a grid and 7.5 meter copper strip upto test point, testing of earthing system and getting the earthing value less than 5 ohm in any soil condition.

M & L for PCC (1:2:4) type B1, using (20 mm graded stone aggretgate) for earth chambers as in repairs, coping for GI pipe post including necessary form work, excavation in soft loose soil, returning in filling and removing surplus soil to a distance n. exc 50 mtr and deposing where directed.

Removing existing worn out CI cover with angle iron frame of earth chamber and supply and fix new CI cover of size 30 cm x 30 cm x 6 mm thick fixed in frame made out of mild steel angle iron 40 mm x 40 mm x 6 mm thick with and including locking and lifting arrnagement, painting with two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer complete all as specified and directed

Supply and lay 40mm dia, GI pipe, light grade, burried in trenches as earth continuity protection as in repairs, including necessary excavation and earth work in hard/dense soil, returining & filling in, watering and well ramming, removal of surplus soil to a distance not exc 50 mtrs complete all as specified and directed.

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