REPAIR, MAINTENANCE AND REPLACEMENT OF LIGHTENING ARRESTORS, EARTHING INFRASTRUCTURE AND CONNECTED OTHER MISC ITEMS AT AF STN BHUJ

Amount

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, replacing the rusted earthing leads/funnel / mesh with new ones etc 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 complete all as specified and as directed by Engineer-in-Charge. NOTE :(i) All materials 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.

Supply only common salt for earth pit complete all as specified and as directed by Engineer-in-Charge.

Supply only magnesium sulphate for earth pit complete all as specified and as directed by Engineer-in-Charge.

Supply only Charcoal for earth pit complete all as specified and as directed by Engineer-in-Charge.

Supply & fix air termination single pointed solid copper rod 12mm dia, 300mm long mounted on GI pipe 40mm bore light grade embedded in mass PCC complete all as specified and directed by Engineer-in-Charge. (Note :G I Pipe & PCC shall be measured and paid separately.)

Supply and fixing in replacement of GI tubing light grade for mechanical protection of earth strip laid under plinths,floors, roads, paths, culverts etc. or fixed on walls or along poles or emmbeded in PCC for giving support to air termination rod by means of MS clamps with necessary bolts, nuts and washers etc complete all as specified of size 40mm bore complete all as specified and directed by Engineer-in-Charge.

Supply & fix in replacement of test point terminal block made of gun metal / phosphorus bronze/copper of size 75x75x25mm drilled and screwed including 3 Nos 8mm dia 25mm long hexagonal head screw complete all as specified and directed by Engineer-in-Charge.

Supply & fix in replacement of copper strip 32 x 6 mm with saddles and fixing screws etc for roof/down conductor above ground including jointing with rivets/ brazing etc complete all as specified and directed by Engineer-in-Charge.

Supply & fix copper strip 20 x 3.15 mm with saddles and fixing screws etc for roof/down conductor above ground including jointing with rivets/ brazing etc complete all as specified and directed by Engineer-in-Charge.

Supply & fix in replacement aluminium strip 25 x 3.15 mm with saddles and fixing screws etc for roof/down conductor above ground including joining with rivets, bolts, nuts, washers etc complete all as specified and directed by Engineer-in-Charge.

Material & labour for chemical earthing complete with Copper earth plate electrode 90cmx60cm x 5 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 Copper 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 GI protection pipe light grade of 40mm bore and connected to earth strip earthing test point all as shown in electrical plate No.5 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 C1 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 4kg/sqm) with frame, funnel with watering pipe of 15mm bore medium grade, wire mesh and lugs, test point including salt, Coal & Magnesium sulphate etc complete all as specified and directed by Engineer-in-Charge. Note: Copper strip exceeding 7.5m long shall be measured & paid separately.The earth resistance value less than 1 ohm.Failing to achieve the value the contractor shall be re do the earthing without any extra cost.

Material & labour for earthing complete with galvanised steel earth plate electrode 60cmx60cm x 6.3 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/GI protection pipe light grade of 32/40mm bore and connected to earth strip earthing test point all as shown in electrical plate No.5 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 C1 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 4kg/sqm) with frame, funnel with watering pipe of 15mm bore , wire mesh and lugs, test point etc complete all as specified and directed by Engineer-in-Charge. Note: G I strip exceeding 7.5m long shall be measured & paid seperately.

Material & labour for earthing complete with Copper earth plate electrode 60cmx60cmx3.15mm thick buried directly in ground vertically to depth not less than 2.25mtr below ground level with top edge of earth plate at a depth not less than 1.5mtr below normal ground level connected to and including copper strip of 20x3mm as earth lead upto 7.5mtr long fixed by means of bolts, nuts, check nuts and washers etc. of brass including provn of GI protection pipe light grade of 32/40mm bore and connected to earth strip earthing test point all as shown in electrical plate No.5 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 C1 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 4kg/sqm) with frame, funnel with watering pipe of 15mm bore Sch 40, wire mesh and lugs, test point etc complete all as specified and directed by Engineer-in-Charge. Note: copper strip exceeding 7.5m long shall be measured & paid separately.

Supply & fix in replacement of 150W MH flood light with LED flood light-High Lumen output fitting of 100 Watt with exclusive innovative designed, long life versatile pressure die cast aluminium IP65 flood light luminaire with high power LED as light source complete all as specified and directed by Engineer-in-Charge.

Supply and fix 20 mm dia UPVC tubing standard duty with threaded at both ends complete all as specified and directed by Engineer-in-Charge.

Supply and fix 20 MM bore stop/tap valve , UPVC for pipe and fixed complete all as specified and directed by Engineer-in-Charge.

Cutting of existing steel tubing for alterations or addition in position without taking down and screwing for addition of Tee, etc for 20 mm bore connection complete all as specified and directed by Engineer-in-Charge. ( Note :- The cost of excavation , earthwork and fitting of pipe line required at site shall be deemed to be included in unit rate quoted by the tenderer)

Material & labourr for preparation of earth chamber made up of PCC 1:3:6 type C1 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 4kg/sqm) with frame complete all as specified and directed by Engineer-in-Charge.