REPAIR/PREVENTIVE MAINTENANCE OF EARTHING INFRASTRUCTURE TO CERTAIN TECHNICAL BLDGS AT AF STN BKT

Amount

Comprehensive Annual Maintenance for earthing result test and enhancement of earthing quality of existing earthing for any type of Earthing such as GI plate / cupper plate / Chemical/ Bore Earthing connected with HT panel, LT panel, Equipments, Lightening arresters, DG sets, Transformers etc in any position and any place at AF Stn BKT including indaurabagh,WSA and 358 TRU using Digital Earth meter in 3M method and E-N voltage at main DBs and register the result as per proforma provided in Earth Test Ragister dully signed by User, In Case of satisfactory results not found or earth resistance is not within permissible limit or erthing quality degraded the maintanance/enhancement of earthing quality of existing earthing complete will be done with necessary excavation and earth work, complete for chemical treatment of existing earth electrode with Benzonite Powder solution (2x25Kg in each bag) sourounding the earth plate to get the earth resistance less than permissible limit, including pouring of salt water as required, minor repairs for jointing/ welding as required including water up to top of the excavated bore, backfilling of earth pit, measuring the value after refilling pit and testing of earthing after recharging, reconnecting grounding electrode conductor and earth grid applying petroleum jelly etc. to bolted joints to minimise corrosion for the pipe earthing or plate earthing then gel should be used to lower down the resistance complete all as specified and as directed by Engr-in-charge. Note-(i) Necessary compound required for recharging shall be measured and paid separately respective item. (ii) During AMC of earthing , if any parts of the earthing is required to be replaced the same will be done by the contractyor as per directed by EIC . The cost of such parts shall deemed to be included in the unit rate quoted by th contractor for AMC. (iii) Pouring of salt/chemical/charcoal water in the earth pit is included in the rate quoted.

Supply only carbon based low resistivity compound Bentonite powder solution(advanced erath filling compound) complete all as specified and directed by Engr-in-charge.

M& L for Earthing complete with galvanised steel earth plate electrode 60cm x 60cmx6 mm thick burried directly in ground (earth pit not less than 2.25 metres below normal ground level) with top edge of plate not less than 1.5 metre below normal ground level connected to galvanised earth lead wire 4 mm dia by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No 3 of MES Schedule Part-I including and connecting to earthing test point block made of gun metal or phosphorus bronze size 75x75x25mm drilled and screwed including 3 nos. 8mm dia 25mm long hex. head screw and testing on completion with and including 15 mm bore light grade G.I. protection pipe (upto 7.5 M beyond outer edge of earth pit) PCC pit in mix 1:3:6 type C1 with RCC 1:2:4 type B-1 (40 mm thick) cover reinforced with 6 mm dia M.S bars 3 Nos both ways with lifting hook made out of 6 mm dia bar, watering arrangement with funnel and wire mesh and 40 mm bore light grade G.I. watering pipe, common salt and charcoal filling, necessary excavation and earth work including Earthing pit marker/ identifier of Iron plate of size 300mm X 200mm X 3mm and alongwith 1 meter long medium grade GI pipe of size 15 mm dia weilded with steel plate including painting with applying one coat of red oxide and two coat of painting with synthetic enameled paint of approved quality including writing letters as specified ny EIC complete including testing on completion complete all as specified and directed (Colour coding on indicator plate will be done as directecd)

Ditto all as item No 3 above but connected to galvanised earth strip 25x4mm as earthing lead complete all as specified and directed.

Ditto all as item No 3 above but using copper plate 600 mm x 600 mm x 3.15 mm thick and 20×3mm copper strip as earthing lead complete all as specified and directed.

M&L for manual boring underground of 100 mm dia upto 30 mtr depth for each earthing below ground level in any kind of soil strata for insertion of pipe electrod 30 mtr length and coper strips etc. for bore earthing all as directed.

M& L for lowering bore Galvanised iron tubing, 50 mm bore, light grade with all fittings accessories for protection of earth strips complete all as specified and as directed.

Labour only for Bore Earthing complete for lowering of copper strips 20x3.15 mm thick electrode up to bottom level of borewell including filling with Chemical gel of any reputed manufacturer not less than 50 kg per earthing &connecting with earthing test point all as specified and indicated including testing on completion to get earth resistance as specified including 50cmx50cm size earth pit with PVC cover/CI cover complete all as directed. Note:- (i) GI pipe, copper strip will be measured and paid seperatly. (ii) The earthing result to be obtained less thanpermissible limit as per VCAS directive of air force

Supply only copper strip 20 mm x 3.15 mm complete with saddles and fixing screws for fitting the strip for earth continuty conductor up to test points.

M & L for Galvanised iron tubing, 40 mm bore,light grade with all fittings for fixed to pole/wall/ in ground including all fixing accessories complete for protection of earth strip complete all as specified and as directed.

M & L for test point terminal block made of gun metal or phosphorus bronze of size 75x75x25mm drilled and screwed including 3 nos. 8mm dia 25m long hex. head screw including connecting with earthing strip complete all as specified and directed.

Material and labour for Alluminium strip for lightning arrester system of size 25X3 mm including nesassary brazing and connecting complete all as specified and directed.

Material and labour for GI earthing strip of size 25X4 mm including nesassary brazing and connecting for existing earthing system complete all as specified and directed.

Material and labour for GI earthing wire of size 4mm dia galvanised iron or steel wire including nesassary brazing and connecting with existing earthing system complete all as specified and directed.

M & L Galvanised iron tubing,15 mm bore, light grade with all fittings for laying of Earth wire including all fixing accessories complete all as directed.

Dismantling and taking down worn out / broken air termination rod and supply and fixing new air termination,single pointed aluminium rod 12mm dia and 300mm long connecting with existing lightening conductor system complete all as specified and directed.

All as per item No. 16 above but with copper rod

M&L for laying of single run of single core PVC insulated unsheathed multi stranded copper conductor cable of size 6 Sqmm 1100 volts grade as earth continuity conductor drawn through in & including rigid non metallic PVC conduit of suitable size on roof/wall/ceiling including making good the disturbed surfaces of wall etc including taking out old unserviceable burnt/damaged wire from its existing position complete all as directed by Engr-in-Charge (Note : Non metallic PVC conduit rate included in the rate quoted ).

M& L for Earthing pit of PCC 1:3:6 type C1 with RCC 1:2:4 type B-1 40 mm thick cover reinforced with 6 mm dia M.S bars 3 Nos both ways with lifting hook made out of 6 mm dia bar of inner size 300 x 300x 300 mm depth with wall thickness 120mm , watering arrangement with funnel and wire mesh and 20 mm bore light grade G.I. watering pipe complete all as specified and directed.

M&L for brazing/soldering to the copper earth strip of size 20x3.15 mm including dismantling from existing position ,equipments without disturbing the functional requirment of the eqipments and reconnecting complete all as specified and directed.

M & L for pit marker/indicator of size 300x200x3 mm alongwith 1 meter long medium grade GI pipe of size 15 mm dia weilded with steel plate including painting with applying one coat of rad oxide and two coat of painting with synthetic enameled paint of approved quality including writing letters, in different colors as per directive of VCAS 2016 of Airforce all as directed.

Shree Kanth Technologies

H C CONSTRUCTION