REPAIR / REPLACEMENT OF EARTHING, LIGHTENING PROTECTION SYSTEMS AND ALLIED WORKS AT AFS YELAHANKA

Amount

M&L for earthing complete with galvanised steel earth plate electrode 600 x 600 x 6mm 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 normal ground level connected to galvanised strip of 25x4 mm by means of nuts, bolts, checknuts, washers of galvanised iron or steel all as shown in electrical plate No. 3 of SSR Part I of 2009 connected to and including earthing test point or disconnecting / testing link including excavation/ earth work in any strata, removal of surplus earth, GI pipe for watering and funnel, GI Pipe medium grade 40mm dia for earth lead protection, PCC 1:3:6 type C1 chamber with chamber cover in RCC 1:2:4 type B1 all as specified and directed by Engr-in-charge.

M&L earthing complete with GI earth plate electrode 600mmx600mmx6mm thick buried in ground vertically to a depth not less than 2.25 mtrs below ground level with top edge of earth plate not less than 1.5 mtrs below ground level connected with GI earth wire of 4 mm dia up to a length of 7.5 mtr long by means of GI bolts, nuts,washers etc and protected by GI pipe light grade 40mm bore and 20 mm dia GI tubing light grade with funnel for watering, connecting to test point, all as shown in electrical plate No.3 of SSR Part I incl necessary earth work and excavation in any type of soil, PCC(1:3:6) type C1 earth chamber with RCC cover slab 50 mm thick,with RCC (1:2:4) type B1 with 8 mm CTD bars re -inforcement both ways at 140 mm C/C with MS hook,including salt, charcoal and provn of test point complete all as spcified and directed by Engr-in-Charge,

Material and Labour for earthing complete of "Jef Ecosafe" comprising of 17.2 mm dia 3 mtr long Earth electrode of low carbon steel electrode with 250 micron copper bonding, 50 pounds of Ecosafe based environment friendly backfill and suitable clamp, back-fill earthing enhancing compound should strictly be a Eco Safe carbon based conductive concrete type which has a resistivity of less than 0.12 Ohm mtr as per Clause 14.5D of IEEE : 80 standard. Back-fill compound should be electronically conductive (like in metals) and should not depend on moisture for conduction. Back-fill compound should be environment friendly, should solidify when mixed water and set like concrete and should not leach /diffuse into the ground. Back-fill compound shall not mixed with any soil while pouring in the bore hole. Test Certificate as per IEC :62561-7 for Back-fill compound shall be submitted alongwith the material. 17.2 OD SS clamp both side, Eco friendly rust proof heavy duty weather proof Polythylene Earth pit chamber with following dimensions : 254 mm dia (top),330 mm dia (bottom) & 260 mm (height). Make : JEF type R16CB01SS02E06 or its techno commercial equivalent.

Supply and Installation of 10 mm copper bonded Round steel solid Conductor for ring earthing meet the requirements of IS/IEC 62305 and IEC 6256-2, Type B earthing has been proposed for complete buildings. Make : JEF Type J1DC05 or its techno commercial equivalent.

M&L for earthing complete with copper earth plate electrode 600 x 600 x 3.15mm 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 normal ground level connected to copper strip of 20x3 mm by means of nuts, bolts, checknuts, washers of galvanised iron or steel all as shown in electrical plate No. 3 of SSR Part I of 2009 connected to and including earthing test point or disconnecting / testing link including excavation/ earth work in any strata, removal of surplus earth, GI pipe for watering and funnel, GI Pipe medium grade 40mm dia for earth lead protection, PCC 1:3:6 type C1 chamber with chamber cover in RCC 1:2:4 type B1 all as specified and directed by Eng-in-charge.

M&L for earth indicators made of 2 mm thick MS sheet of oval/Triangular/Rectangular shape of size 30 cm x 20 cm duly fixed over MS angle iron of size 25 x 25 x 3mm in size 0.9 metre in total length and 30 cm embedded in below ground level and 60 cm above ground level and angle iron embedded in cement concrete of 1:3:6 type C-2, of size 30 cm x 30 cm x 30 cm painting the steel surfaces with two coats of red paint for chemical earpits and yellow paint for Lightining Arrester( LA), Power Supply(PS) earth pits over coat of red oxide and writing the earth pit indication in alphabets with black colour of 1 inch height and marking all as per the direction of Engr -in-Charge and including necessary earth work and returning filling and removal etc all as specified and directed by the Engr-in-Charge.

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 25x4mm strip galvanised iron complete all as specified and directed.

Repairs to earth chambers by demolishing unserviceable earth chambers and fixing new chambers of PCC 1:3:6 type C1 as per electrical plate no.3 of SSR part-I

Repairs to earth chambers by removing unserviceable earth chambers cover and fixing new cover all as specified and directed.

Repairs to strip of any material and any size by removing from saddles/holders/wall/roof and strengening the strip and refixing complete all as directed.

Supply and fix single pointed air termination aluminium rod,12 mm dia, 300 mm long and fixing upto 20mtr height complete all as specified and directed.

Supply and fix single pointed air termination copper rod,12 mm dia, 300 mm long and fixing upto 20mtr height complete all as specified and directed.

Supply and fix aluminium strip 25 mm x 3 mm complete with saddles and fixing screws etc for roof conductors and down conductors above ground level fixing upto 20mtr height including removing u/s strips complete all as specified and directed.

Supply and fix copper strip 20mm x 3 mm complete with saddles and fixing screws etc for roof conductors and down conductors above ground level and fixing upto 20mtr height complete including removing u/s strips complete all as specified and directed.

M&L for Test point terminal box made of gun metal or phosphorous bronze, size 75x75x25 mm drilled and screwd including 3 Nos 8 mm dia 25 mm long hexagonal head screw including removing the existing all as specified and directed.u/d test point terminalblock complete all as specified and directed.

S&F porcelain strip holder on wall and roof of suitable size including removing broken u/s one complete all as specified and directed.

Recharging of normal earth pits by excavating the earth at a radius of 600mm from the centre from the earth pit and at a depth of 900mm after removing the earth chambers and accessories carefully and keeping aside for reuse including adding and spreading chemicals as given below in 75mm layers each as ground level and watering, refixing the earth chambers and accessories after allowing the soil to settle down complete all as specified and directed by Engr-in charge. (a) Charcoal 10 kg (b) Salt 10Kg

M&L for Testing of exisiting earthing resistance with suitable digital Earth tester and recording the readings obtained and making the earthing good by pouring the salt water complete up to the satisfaction of the Engr-in-Charge. Note :- Value of earth resistance should be less than 2 Ohms.

M&L for Testing of exisiting earthing resistance with suitable digital Earth tester and recording the readings obtained. Note : A separate register will be maintained for each building for every three months (quarterwise) (for equipment earthing, LA, power etc) duly obtaining the signature of the user.

B5BUILDING SOLUTIONS

SRINIVASA ENTERPRISES

PRAGATI ELECTROCOM PVT LTD

SREE VARU ELECTRICALS

Sobha Projects & Trade Pvt Ltd

Vinayaka Enterprises

RRK PROJECTS