REPAIR/MAINTENANCE OF EARTHING INFRASTRUCTURE AT AF STN BAREILLY

Labour only for cleaning the vegetation/surplus soil around the earth pits upto 1.00 mtr all around the pit, cleaning the chamber of the earth pit & checking the results of the earthing using earth tester, re-activating the earth pit using suitable measures as required to bring the results within the limits of 1 /2/3/5 Ohm complete all as specified and directed. NOTE : i) All material required for re-activation of earthing pit will be measured and paid separately under supplied only of respective item of schedule. ii) The resistance test of earth pits to be carried out in dry season only. iii) Contractor has to submit the satisfactory earth test result duly countersigned by users for payment purpose.

Supply only common salt for earth pit.

Supply only Charcoal dust

Supply only magnesium sulphate for earth pit.

M & L in replacement of earthing complete with copper plate electrode 600 x 600 x 3.15 mm thick burried directly in ground earth pit not less than 2.25 mtr deep below ground level connected to & inclduing copper strip 20x3 mm by means of nuts and bolt check nuts and washers of galvanised iron sheet, passing through protection pipe of 25 mm dia light grade GI pipe all as shown in electrical plate Nos 3 of SSR Part-I, and connected to earthing test point complete inclduing testing filling of adquate quantity of charcoal dust and common salt including refilling earth and removal of surplus soil upto 50 mtrs apart and PCC 1:3:6 type C-1 chamber precast slab 50mm thick in cement concrete (1:2:4) type B1 (reinforced with welded steel wire fabric (XPM) of weight not less than 4 kg/sqm)with frame, funnel with watering pipe of 15mm bore GI pipe light grade , wire mesh and lugs, test point etc. complete all as specified and directed. Note:- Copper strip exceeding 7.5m long shall be measured & paid seperately.The earth resistance value will be less than 1 Ohm. Failing to achieve this value, the contractor shall be re-do the earthing without any extra cost to the govt.

M&L in replacement of earthing complete with galvanised steel earth plate electrode 60cmx60cm x 6 mm thick buried directly in ground vertically to depth not less than 2.25 mtr below ground level with top edge of earth plate at a depth not less than 1.5 mtr below normal ground level connected to and including GI strip of 32x6mm as earth lead up to 7.5 mtr long fixed by means of bolts, nuts, check nuts and washers etc. of galvanised iron or steel including provn of HDPE protection pipe light grade of 32/40mm bore and connected to earth strip earthing test point all as shown in electrical plate No.3 of SSR Part-I 2009 and as specified or indicated and testing on completion including necessary excavation & earthwork in any type of soil, PCC (1:3:6) type C-1 chamber, precast slab 50mm thick in cement concrete (1:2:4) type B1 (reinforced with welded steel wire fabric (XPM) of weight not less than 4 kg/sqm) with frame, funnel with watering pipe of 15mm bore GI pipe light grade, wire mesh and lugs, test point etc. complete all as specified and directed. Note:- GI strip exceeding 7.5m long shall be measured & paid seperately.The earth resistance value will be less than 1 Ohm. Failing to achieve this value, the contractor shall be re-do the earthing without any extra cost to the govt.

M&L in replacement of chemical earthing complete with Copper earth plate electrode 90cmx60cm x 5 mm thick buried directly in ground vertically to depth not less than 3.00 mtr below ground level with top edge of earth plate at a depth not less than 2.25 mtr below normal ground level connected to and including Copper strip of 32x6mm as earth lead up to 7.5 mtr long fixed by means of bolts, nuts, check nuts and washers or brazing etc. of galvanised iron or steel including provn of GI protection pipe light grade of 40mm bore and connected to earth strip earthing test point all as shown in electrical plate No.3 of SSR Part-I 2009 and as specified or indicated and testing on completion including necessary excavation & earthwork in any type of soil, PCC (1:3:6) type C-1, chamber, precast slab 50mm thick in cement concrete (1:2:4) type B-1 (reinforced with welded steel wire fabric (XPM) of weight not less than 4 kg/sqm) with frame, funnel with watering pipe of 15mm bore medium grade, wire mesh and lugs, test point including salt (150Kg), Coal dust(100Kg) & Magnesium sulphate (150Kg) including refilling of earth pit with cultivated soil and removal of surplus soil upto 50 mtrs apart etc. complete all as specified and directed. Note:- Copper strip exceeding 7.5m long shall be measured & paid separately.The earth resistance value will be less than 1 Ohm. Failing to achieve this value, the contractor shall be re-do the earthing without any extra cost to the govt.

S&F in replacement of GI electrode 80 mm dia, 1.6mm thickness of pipe duly filled with CCM and 3 mtr long with 25 Kg earth enhancing chemical compound and poly plastic cover PP4 buried directly in ground horizontal to depth not less than 3.00 mtr below ground level and connected with existing earth strips complete all as specified and directed.

S&F in replacement of Copper bonded electrode 76mm dia, 1.6mm thickness of pipe duly filled with CCM and 3 mtr long with 25 Kg earth enhancing chemical compound and poly plastic cover PP4 buried directly in ground horizontal to depth not less than 3 mtr below ground level and connected with existing earth strips complete all as specified and directed.

S&F in replacement of Copper electrode 76mm dia, 0.6mm thickness of pipe duly filled with CCM and 3 mtr long with 25 Kg earth enhancing chemical compound and poly plastic cover PP4 buried directly in ground horizontal to depth not less than 3 mtr below ground level and connected with existing earth stripscomplete all as specified and directed.