Earth pit maintenance of substation common earthing-reg

EARTHING

Earthing with copper earth plate 600 mm X 600 mm X 6 mm thick including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe of 2.7 metre long with funel etc. (but without charcoal/ coke and salt ) as required. It also includes removing the existing earth plate and any related accessories, if present and all other works for provide earthing as per site condition -Road /concrete cutting, excavation in hard rock, along with removal of any debris or material on working site etc and making good the same in case of any damage in existing structure as required.(Site visit recomended). Earthing over all resistance should be less than 1ohm and it shall be measured by an approved earthing apparatus. The bidder should provide test certificate as a proof of measurement and value of specified earth resistance.

Earthing with copper earth plate 600 mm X 600 mm X 3 mm thick including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe of 2.7 metre long with funel etc. (but without charcoal/ coke and salt ) as required. It also includes removing the existing earth plate and any related accessories, if present and all other works for provide earthing as per site condition.(Site visit recomended). Earthing over all resistance should be less than 1ohm and it shall be measured by an approved earthing apparatus. The bidder should provide test certificate as a proof of measurement and value of specified earth resistance.

Supplying and laying 32 mm X 6 mm copper strip at 0.50 metre below ground as strip earth electrode, including connection/ terminating with nut, bolt, spring, washer etc. as required. (Jointing shall be done by tinning on overlapping and with 2 sets of brass/Steel nut bolt & spring washer spaced at 50mm).It also includes all other works related for laying copper strips as per site condition-Road /concrete cutting, along with removal of any debris or material on working site etc and making good the same in case of any damage in existing structure as required.(Site visit recomended)

Supplying and laying 25 mm X 3 mm copper strip at 0.50 metre below ground as strip earth electrode, including connection/ terminating with nut, bolt, spring, washer etc. as required. (Jointing shall be done by tinning on overlapping and with 2 sets of brass/Steel nut bolt & spring washer spaced at 50mm).It also includes all other works related for laying copper strips as per site condition-Road /concrete cutting, along with removal of any debris or material on working site etc and making good the same in case of any damage in existing structure as required.(Sie visit recomended)

Supply of suitable amount (60kg) of earthing compound (EXCEL compound or equivalent) etc. as required.

Providing and fixing earth bus of 50 mm X 5 mm copper strip on surface for connections etc. as required

MISC.CIVIL ITEMS

12 mm cement plaster of mix 1:4 (1 cement: 4 fine sand)

Finishing with Delux Multi surface paint system for interiors and exteriors using Primer as per manufacturers specification Two or more coats applied on walls@ 1.25/10 sq.mm over and including one coat of special primer applied @.75 ltr/10 sq.mtr

Brick work with common burnt clay F.P.S(non modular) bricks of class designation 7.5 in foundation and plinth. It also includes removing the existing brics,concreate,cement plaster etc as per site condition(Site visit recommended). Cement mortar 1:4 (1cement : 4 coarse sand)

Cement concrete flooring 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate) finished with a floating coat of neat cement, including cement slurry, but excluding the cost of nosing of steps etc. complete 40 mm thick with 20 mm nominal size stone aggregate

MISC. Items

Charges for removing the existing copper strip, making good the damages of the wall or any other existing structures and conveyance of the material to the godown etc. as required.

Supply and fixing of CI/MS cover plate hinged to frame with Locking arrangement

Supply and fixing of metal sign board in standard size as per IS 2551 for indicating earthing details, warning signs etc

Material Testing (All items related to copper in this work shall have a copper purity of 99% or higher)

Providing sample test report for copper earthing materials used in earthing works, through a Government-approved testing laboratory, to verify the purity of copper as per relevant standards. Testing shall be carried out for five (5) different samples. The contractor shall arrange the testing and submit the test reports. Payment shall be made on a pro-rata basis as per the number of samples tested, complete as required and as directed by the Engineer-in-Charge.

Please Enable Macros to View BoQ information