SPECIAL REPAIR OF EARTHING PITS, LIGHTING ARRESTOR AND OTHER CONNECTED ALLIED WORKS AT AFS MUMBAI UNDER GE AF THANE

Amount

Checking/ Testing of resistance value of any type of earth pits by disconnecting earth continuity conductor from test terminal block and reconnecting the earth continuity conductor after testing. Note: (i) Temporary earthing connection to be provided while testing. (ii) Earth tester will be provided by MES. (iii) Contractor has to prepare sketch of earthings indicating the locations in surrounding E&M installations for purpose of earthings (iv) Earth test results shall be recorded in reference to sketch. (v) Earthing to be tested quarterely . (v) If earth test result is not satisfactory ,earthing test will be carried out again after maintenance and this will be included in quoted rate nothing extra shall be paid on this account. (vi) Earth test to be signed by Rep of contractor, Rep of MES,Test reports to be submitted in triplicate.

M&L for maintenance of copper pipe earthing to improve the earth resistance as following:- (a) Remove the earth pit carefully and kept at site for reuse. If existing pit is already damaged then new pit will be provided, measured & paid separately. (b) Excavation in any type of soil and rock 0.5 cum (approx 0.75m x 0.75m x 0.9m depth ) (c) On First day recharge the earth pit with common salt, Magnisium sulphate,back fill compound mixed with water.(Approx salt- 10 kg, Mg sulphate- 10 kg, Back fill compound - 10 kg ) (d) On the next day recharge the earth pit with water 500 ltrs on next day. (e) Excavated material to be removed from the site and deposit at the distance not exceeding 50m distance and levelled. (f) Refill the pit with M&L for black cotton soil 0.5cum. (g) Refit the earth pit in place. (h) Testing of earth ( to be included in quoted rate) Note:-(i) Common salt, Mg sulphate, back fill compound required for maintaining earthing to required results shall be included in quoted rate. .

M&L for maintenance of GI plate earthing to improve the earth resistance as following:- (a) Remove the earth chamber carefully and kept at site for reuse. If existing chamber is already damaged then new chamber will be provided, new chamber will be measured & paid separately. (b) Excavation in any type of soil and rock 1 Cum (approx 0.75m x 0.75m x 2 m depth ) (c) Taking out GI Earth plate , watering pipe , funnel , earth continuty GI strip, cleaning of GI earth plate and GI strip with wire brush and polish paper , cleaning of GI pipe and funnel and renistall the the same (d) GI strip shall be fitted with GI plate by GI nutbolts - 3 nos and in addition welding to be caried out , weld length between GI plate and GI strip not less than 30 CM on both side of strip (e) On First day recharge the earth pit with charcoal ,common salt, back fill compound mixed with water and black cotton soil (Approx charcoal - 25 KG, salt- 25 kg, Back fill compound - 25 kg , black cotton soil 0.5 Cum (f) On the next day recharge the earth pit with water 500 ltrs on next day. (g) Excavated material to be removed from the site and deposit at the distance not exceeding 50m distance and levelled (h) Refill the pit with M&L for black cotton soil 0.5cum. (j) Refit the earth chamber in place. (k) Testing of earth ( to be included in quoted rate) Note:- charcoal , Common salt, back fill compound required for maintaining earthing to required results shall be included in quoted rate. .

M&L for maintenance of copper plate earthing to improve the earth resistance as following:- (a) Remove the earth chamber carefully and kept at site for reuse. If existing chamber is already damaged then new chmber will be provided,new chamber will be measured & paid separately. (b) Excavation in any type of soil and rock 1 Cum (approx 0.75m x 0.75m x 2 m depth ) (c) Taking out Copper Earth plate , watering pipe , funnel , earth continuty copper strip, cleaning of copper earth plate and Copper strip with wire brush and polish paper , cleaning of GI pipe and funnel and renistall the the same (d) copper strip shall be fitted with copper plate by brass nutbolts - 3 nos and in addition brazing to be caried out , brazing length between copper plate and copper strip not less than 30 CM on both side of strip (e) On First day recharge the earth pit with charcoal ,common salt, back fill compound mixed with water and black cotton soil (Approx charcoal - 25 KG, salt- 25 kg, Back fill compound - 25 kg , black cotton soil 0.5 Cum (f) On the next day recharge the earth pit with water 500 ltrs on next day. (g) Excavated material to be removed from the site and deposited at the distance not exceeding 50m distance and levelled . (h) Refill the pit with M&L for black cotton soil 0.5cum. (j) Refit the earth chamber in place. (k) Testing of earth ( to be included in quoted rate) Note:- charcoal , Common salt, back fill compound required for maintaining earthing to required results shall be included in quoted rate. .

M&L for fixing earth indicators made out of 3 mm thick MS sheet of size 200 mm x 300 mm duly fixed in MS angle iron 25 mm x 25mm of 600 mm long fixed to ground by means and including necessary cement concrete foundation and painting with one coat of synthetic enamel paint over a coat of red oxide primer complete for writing earth reading and connected plant/ panel etc. and excavation and earth work complete all as specified and as directed.

Material and labour for supply, installation, testing and commissioning of copper pipe electrode earthing maintenance free earthing based on 3 mtr long copper pipe 50 mm dia(ID) with wall thickness of 2 mm, copper strip in pipe and filled with MFC for improvement of conductivity of electrode duly fixed with connector at top connection of copper strip 25X3 mm riveted /nut bolt after 12 mm boring and further earth continuity conductor made of copper strip 25x3 mm upto 7.5 meter , 60 KGS BFC shall be filled around the copper pipe elecrode ,including providing FRP pit cover of size 250mm X 250mm X 250mm complete as per manufacturer specification and complete all as specified and directed by Engr-in-Charge. Note:- (i) Rate included for testing,commisioning including checking of earth continuity and earth result complete all as specified and directed. (ii) Vendors are bound to get earthing result upto1 Ohm with grid of three earthings and 2 Ohm with grid of two earthing, 3 ohm with single earthing, Any additional work and material required to achive the required result is included in the cost (iii) Earth strip beyond 7.5m shall be measured and paid separately. (iv) Rate is included for boring of earthing in any type of soil/rock,minimum dia of bore 150mm. (v) Continuity of good earth resistance shall maintained upto 1 year and testing will be carried out monthly by MES authority. Make of Earthing electrode and BFC. (vi) Test point terminal box made up of gunmetal or phosphous bronze 75mmx75mmx25mm encluded in quoted rate.

Material and labour for supply, installation, testing and commissioning of GI pipe electrode earthing maintenance free earthing based on 3 mtr long GI pipe 50 mm dia(ID) medium grade, GI strip in pipe and filled with MFC for improvement of conductivity of electrode duly fixed with connector at top connection of GI strip 32X6 mm riveted /nut bolt after 12 mm boring and further earth continuity conductor made of GI strip 32x6 mm upto 7.5 meter , 60 KGS BFC shall be filled around the GI pipe electrode including providing FRP pit cover of size 250mm X 250mm X 250mm complete as per manufacturer specification and complete all as specified and directed by Engr-in-Charge. Note:- (i) Rate included for testing,commisioning including checking of earth continuity and earth result complete all as specified and directed. (ii) Venders are bound to get earthing result upto 5 Ohm for single earthings and 3 Ohm with the grid of two earthing.Any additional work and material required to achive the required result is included in the cost quoted by the tenderer. (iii) Earth strip beyond 7.5m shall be measured and paid separately. (iv) Rate is included for boring of earthing in any type of soil/rock,minimum dia of bore 150mm. (v) Continuity of good earth resistance shall maintained upto 1 year and testing will be carried out monthly by MES authority. Make of Earthing electrode and BFC. (vi) Test point terminal box made up of gunmetal or phosphous bronze 75mmx75mmx25mm encluded in quoted rate.

M&L for providing earthing complete with Copper earth plate electrode 600 mm x 600 mm x 3.15 mm thick buried directly in ground earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 Mtr below normal ground level connected to copper earth strip 20 x 3 mm by means of bolts, nuts, checknuts & washers of copper and connecting to test point , providing charcoal and common salt ,all as shown in electrical plate No. 3 of SSR Part I of 2020 & as specified or indicated and testing on completion including excavation/earth work in any type of strata PCC ( 1:3:6 ) type C1 earthing chamber, pre cast slab 50 mm thick in cement concrete ( 1: 2 : 4 ) type B1 (reinforced with welded steel wire fabric (XPM) weight not less than 4 Kg / Sqm), funnel with wire mesh, watering pipe of 20 mm bore medium grade and lugs, including copper earth strip 20 x 3 mm with GI protection pipe of 25 mm medium grade 7.5 meter long, etc complete all as specified. Note-- (i) Vendors are bound to get earthing result upto1 Ohm with grid of three earthings and 2 Ohm with grid of two earthing, 3 ohm with single earthing, Any additional work and material required to achive the required result is included in the cost. (ii) Excavated material to be removed from the site and deposit at the distance not exceeding 50m distance and levelled. (iii) Refill the pit with M&L for black cotton soil 1 cum. (iv) Test point terminal box made up of gunmetal or phosphous bronze 75mmx75mmx25mm encluded in quoted rate.

M&L for providing earthing complete with galvanised iron earth plate electrode 600 mm x 600 mm x 6mm as earthing lead buried directly in ground vertically to a depth not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 Mtr below normal ground level connected to and including galvanised iron strip 32x6 mm as earthing lead by means of bolts, nuts, check nuts & washers etc made of GI and connected to earthing test point, providing charcoal and common salt all as shown in electrical plate No. 3 of SSR Part I of 2020 & as specified or indicated and testing on completion including exaction/earth work in any type of strata PCC (1:3:6) type C1 earthing chamber, pre cast slab 50 mm thick in cement concrete (1:2:4) type B1 (reinforced with welded steel wire fabric (XPM) weight not less than 4 Kg/sqm), funnel with wire mesh, watering pipe of 20 mm bore medium grade and lugs, including galvanised iron strip 32x6 mm with GI protection pipe of 40 mm medium grade 7.5 meter long, etc complete all as specified. Note:- (i) Venders are bound to get earthing result upto 5 Ohm for single earthings and 3 Ohm with the grid of two earthing.Any additional work and material required to achive the required result is included in the cost quoted by the tenderer.(ii) Excavated material to be removed from the site and deposit at the distance not exceeding 50m distance and levelled. (iii) Refill the pit with M&L for black cotton soil 1 cum.(iv) Test point terminal box made up of gunmetal or phosphous bronze 75mmx75mmx25mm encluded in quoted rate.

M & L for maintenance free chemical Gel based earthing, Pure Copper type having 25 mm dia 3 mtr long Copper rod including Copper strip of length not more than 7.50 meters of size 25 x 3 mm with 50 Kg back fill compound including necessary excavation and earth work in any type of soil, including FRP cover including testing on completion and taking down of old earthing all as directed by Engr in-Charge Note : (1) 7.50 RM copper earth strip including copper pipe light grade is deemed to be included in the quoted rates, beyond 7.50 RM shall be measured and paid separately. (2) Earth resistance of earth pit should be less than 1.0 Ohms on testing after completion. If the desired earth resistance is not obtained the earthing will be redone at no extra

M & L for maintenance free chemical Gel based earthing, copper type having 80 mm dia 3 mtr long Copper hollow pipe(Wall thickness of 3.2 mm) and 7.50 m long copper strip earthing electrode of size 25 x 3 mm with 60 Kg back fill compound including necessary excavation and earth work in any type of soil, perforated watering pipe, funnel with wire mesh, earth lead protection pipe light grade,Fibre reinforced plastic earthing round pit including testing on completion and taking down of old earthing all as directed by Engr in-Charge Note : (1) 7.50 RM copper earth strip including copper pipe light grade is deemed to be included in the quoted rates, beyond 7.50 RM shall be measured and paid separately. (2) Earth resistance of earth pit should be less than 1.0 Ohms on testing after completion. If the desired earth resistance is not obtained the earthing will be redone at no extra cost.

Taking down old strip of any type and size complete all specified and directed.

S & F GI earth continuity conductor or main earthing lead of size 25x4 mm 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 earthing etc. as required complete all as directed.

S & F Copper earth continuity conductor or main earthing lead of size 25x3 mm 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 earthing etc. as required complete all as directed.

S & F copper earth continuity conductor or main earthing lead of size 20x3 mm 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 earthing etc. as required complete all as directed.

S & F GI wire 4mm dia 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 earthing etc. as required complete all as directed.

Taking down old unserviceable earth copper wire of any type and size complete all specified and directed.

S&F PVC insulated single core unsheathed multistranded cable FR, green colour with copper conductor size 6 sqmm for voltage grade upto 1100 volts complete all specified and directed.

S&F of PVC insulated single core unsheathed multistranded cable FR, green colour with copper conductor size 10 sqmm for voltage grade upto 1100 volts complete all specified and directed.

Taking down old Test point of any type and size complete all specefied and directed.

Supply and fix Test point terminal box made up of gunmetal or phosphous bronze of size 75mmx75mmx25mm complete all specified and directed.

Supply and fix Test point Air termination, single pointed, copper rod 12 mm dia and 300 mm long complete all as specified and directed by Engineer-in-charge.

Supply and fix Test point Air termination, single pointed, Aluminium rod 12 mm dia and 300 mm long complete all as specified and directed by Engineer-in-charge.

S&F Porcelain insulator with nut bolt and washer suitable for fixing copper/gil/Aluminium strip on wall or ceiling complete all specified and directed.

Supply and fix sheet steel enclosure for test terminal block of size 150x150 mm made out of 2 mm thick dully Powder Coated CRCA sheet for fixing test terminal block complete all specified and directed.

Supply and fix stormking ESE-60SS early steamer Emission Air Terminal Compilant to NFC 17-102 :2011 . Terminals works on dual trust desugn and comprised of separtae electrically isolated dual panels surrounding an central Final .Perfromance tested in Eropean accrediated test labortary after 2011 also tested for impulse current with stand test in CPRI for 40KA Make PP-MAP ESE-60 SS complete all specified and directed.

Supply of supporting GI guyed mast 10 Mtrs with mounting stand & guying wire rope U clamps etc with mountigs and fixing accessories complete all specified and directed.

Supply of lighting strike recorder ( 6 digit Display ) of non resettable type of an IP 65 enclouser with mimimum sensitivity of 1000 A and maximum cpapcity of 220 KA (8/20microsec wave form) tested as per IEC 60 -1 :1989 Model - PP-MAP-LSR complete all specified and directed.

M/s ASPIRE ENGINEERING ENTERPRISES

Anjali Constructions