REPAIR REPLACEMENT TO EXISTING EARTH PITS AND OTHER MISC WORKS FOR CERTAIN AREA UNDER 17 FBSU MUKUNNIMALA UNDER GE AF TRIVANDRUM

Amount

SCHEDULE 'A'

M&L for earth testing , identifying the earth pit and recording of test results in prescribed format all as directed by Engr in Charge. Resistance for each earth pit result to be submitted to Engr-in-Charge duly signed by user and MES rep. Note : (i) Quarterly earth pit resistance value will be tested and test report will be submitted by contractor to Engr-in-Charge. all earth pits mentioned in item No2.01 to 2.05 to be checked quarterly and rate quoted against each job is inclusive for all four quarters. (ii) EP No should be mentioned on individual earth pits and ER value of installation etc all as specified and directed by Engr In Charge. (iii) Painting and marking of each Earth Pit will be done as directed by Engr-in-Charge. (iv) All equipments required for testing purpose will be arranged by contractor without any extra cost. (v) Rate quotaed is for checking of earth esistance value

Chemical type Earth test less than 1 Ohm (multiple earth pits will considered as 1 earthing point)

Chemical type Earth test less than 3 Ohm (multiple earth pits will considered as 1 earthing point)

Chemical type Earth test 5 to 10 Ohms (multiple earth pits will considered as 1 earthing point)

Copper type Earth test 5 to 10 Ohms

Convetional type earthing test less than 3 Ohm

Supply and fixing GI strip 32 x 6mm thick as earthing lead fixed to wall/roofs etc all as directed.

Supply and fixing Aluminium strip 25 x 3mm with saddles and fixing screws etc. for roof conductors and down conductors above ground etc all as directed.

Supply and fixing copper strip 25 x 3mm thick as earthing lead fixed to wall/roofs etc all as directed.

S&F epoxy base insulators of suitable size 40mm height for fixing GI earth strip on wall/ceiling/floor/poles etc all as directed. .

S&F in Repair Test point terminal block made of gun metal or phosphorus bronze size 75x75x25mm, drilled and screwed including, 3 NOS, 8mm dia 25mm long hex, head screw etc complete all as specified and directed the Engr in charge.

S&F air termination single pointed aluminium rod of 12mm dia 300mm length fixed to GI strip 32x6mm/aluminium strip 25x3mm including nuts, bolts and washers complete all as specified and directed the Engr in charge.

M&L adding salty water into earthing pit to improve earth conduictivity (20 Kg common salt to be dissolved in water and pour the same through watering pipe of earth chamber to earth pit including checking of connection and making good the defective connections with necessary nuts, bolts washers replacing of defective pipe protection GI wire, PCC & earth work etc all as specified and directed by Engineer-in-charge.

Supply and laying charcoal dust to improve the ER value of existing earth pits

Supply and laying common salt to improve the ER value of existing earth pits

Supply and laying Magnesium sulphite in trenches to improve the ER value of existing earth pits

Supply and laying Curec + earth enhancement compound

Supply and laying Curecon earth enhancement compound

Note for Sl Item No. 10 to 14 : Excavation shall be done as specified and directed by the Engineer in Charge to complete the work. Cost of excavation , returning and filling in is deemed to be included in quoted rates by the contractor against each BOQ item.

Supply and fixing PCC earth chamber 1:3:6, RCC 1:2:4 cover slab with 6mm dia TMT bar ,100mm c/c,MS bar lifting hook including replacement of rusted watering pipe 20mm bore med grade, UNSV GI funnel with wire mesh complete all as specified and as directed.

Brazing / welding arrangement for existing copper / aluminium / iron strip of any size complete all as specified.

M&L for replacing rusted nut and bolt brass type as per exisitng size complete all as specified and directed.

S&F earth pit cover made of heavy duty polyplastic and earth inspection cover made of high grade polypropylene of size top dia not less than 250mm, bottom dia not less than 330mm dia and height not less than 260mm having load bearing capacity not less than 8 tonnes for each electrode etc, complete all as specified and directed. Make : Electrogrip model No EPC-11 of ISG Global or equivalent.

M&L for earthing complete with galvanised steel earth plate electrode 60cmx60cmx6mm thick, buried directly in ground (earth pit not less than 2.25 mtrs deep below ground level) with top edge of the plate not less than 1.5 mtrs below normal ground level, connected to galvanised iron strip 32×6mm as earthing lead by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No 3 in SSR connected to earting test point all as specified or indiealed complete with excavation & earth work, PCC pit with 50mm thick RCC cover (grade M-15) having suitable handle (10mm MS Rod) 20mm dia GI medium grade watering pipe with GI funned with wire mesh 40mm bore GI pipe (light grade) forprotection of earth lead conductor all as directed and testing on completion.

M&L for earthing complete with copper plate electrode 60cmx60cmx3.15mm thick, buried directly in ground (earth pit not less than 2.25 mtrs deep below ground level) with top edge of the plate not less than 1.5 mtrs below normal ground level, connected to copper strip 20×3mm as earthing lead by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No 3 in SSR connected to earting test point all as specified or indiealed complete with excavation & earth work, PCC pit with 50mm thick RCC cover (grade M-15) having suitable handle (10mm MS Rod) 20mm dia GI medium grade watering pipe with GI funned with wire mesh 40mm bore GI pipe (light grade) forprotection of earth lead conductor all as directed and testing on completion. Note : (a) inter connection of copper strip measured and paid seperately

Supply, installation, testing and commissioning of maintenance free chemical earthing comprising of High tensile low carbon steel rod of 3 mtr length and 17.2 mm dia with 250 micron (average) molecularly bounded copper on the outer surface to confirm with requirements of UL 467 including suitable copper earth termination clamp alongwith back fill compound of 69 Kgs strictly be a carbon based conductive concrete type which has a fixed carbon content of more than 99 % and resistivity of less than 0.12 Ohm Mtr as per clause 14.5 D of IEEE, 80 standard, back fill compound should be electronically conductive (Like in metals) and should not depend on moisture for conduction, size of bore 150 mm dia, 12 feet depth, complete all as specified and directed. Make : JEF Eco safe earthing or equivalent, Make of chemical : JEF ECOSAFE

Note : (i) Rate of backfill compound of 23 Kg of 3 bags for each pit deemed to be included in the quoted rate. (ii) Manufacturers name will be embedded on the electrode supplied by the contactor and original purchase voucher for same will be submitted. (iii) The connection clamp shall be permanently welded to the copper od to avoid any kind of connectivity loss. The pre welded copper bounded shall not need any additional clamp for termination. (iv) Earth bresistance tester will be provided by the contractor. Tester should be calibrated from authorised company lab.

(v) Sign board of mild steel 3 mm thick duly painted with two coats of synthetic enamel paint over a coat of red oxide Zinc cozt primer showing result of earthing should be fixed near the earth pit after completion as directed by Engr- in- Charge

Sub Total of Schedule 'A'

SCHEDULE OF CREDIT

Schedule of Credit (Minus) Rs. 2727.50 B/F from Ser page No.91. NOTE: Bidder shall insert credit amount as rate Rs. 2727.50 in Green field under Col-5.

Sub Total of Schedule of Credit

SUPER COOL

JEETH CONSTRUCTION

Shilpa Engineers and Contractors