GE/ALP (8166B) KOLKATA OF 2022-23

Amount

M & L for earthing complete with galvanized steel earth plate electrode 600 mm x 600 mm x 6 mm buried directly in ground, earth pit not less than 2.25 mtrs deep below ground level, with top edge of the plate at a depth of not less than 1.5 mtrs below ground level connected to galvanized earth strip size 32mmx6mm as earthing lead by means of GI bolts, nuts and washers upto 7.5 meters length from earth chamber / fit etc all as shown in electrical plate No.3 of MES SSR Part-I and connecting to earthing test point including necessary excavation and earth work in any type of soil, returning, filling in and disposal of surplus soil to a distance exceeding 50mtrs, PCC (1:3:6) type C1 (using 20mm graded stone aggregate) earth pit, 40mm thick RCC (1:2:4) type B1 (using 20 mm graded stone aggregate) cover with suitable reinforcement, watering arrangement, funnel etc complete all as specified and directed.

M & L for earthing complete with galvanised steel pipe electrode, 40mm bore, medium grade, 2.5 metres length, buried directly and preferably vertically in ground with top edge not less than 1.25 metres below ground level connected with earthing lead of 4mm dia galvanised iron or steel wire all as shown in Plate No. 2 to the earthing test point including testing on completion complete all as specified and as directed.

M& L for Maintenance Free (Chemical) earthing by using UL listed copper bonded solid steel rods as vertical electrode made of high tensile low carbon steel rod, molecular bonded with 99.9% electrolytic copper with miniumum bonding thickness of 254 microns-25 mm dia copper bonded rod with minimum length of 3024mm (10ft as pr UL) and as per IEC 62561-2. Universal clamp of required size should be made up of SS304. Earth enhancement compound of resistivity 0.018 ohm meter-30Kg should be used made graphite and carbon should be of conductive concrete based mineral compound producing low resistance of an earth termination suystem. Material of the earthing enhancing compound shall be chemically inert to subsoil. It shall not pollute the environment. Below test report should be submitted for Earth rod should be tested CPRI tested for 87.5 Ka Ipeak and 35 ka Irms for 1 sec and test reports for Marking, dimension, electrical resistance before and after salt mist test, tensile strength, bend test, adhesion test. The compound shall be tested and certified as per IEC 63561-7 and also fulfill Toxicity Characteristic Leaching Procedure (TCLP) requirements.

M & L for earthing with Copper Earth Plate Electrode 600X600X3.15mm, buried directly in Ground vertically at a depth not less than 2.25 m below Ground Level with the top Edge of Earth Plate at a depth not less than 1.50 m below Ground Level connected to copper strip of size 25x3mm as Earth Lead by means of Bolts, Nuts, Check Nuts and Washers of copper , Earth Plate Electrode surrounded by a packed thickness of Char Coal or Coke Dust mixed with Common Salt in alternate layers of not exc. 150mm thick, GI Strip protected with and including 40mm bore GI Light Grade Pipe upto 1.0METRE above the Floor Level of the Building where Main Switch/DB situated including PCC Pit in Cement Concrete (1:3:6) type C1 (20mm Graded Stone Aggregate) and RCC Cover of size 450X450X50mm in RCC (1:2:4) type B1 (20mm Graded Stone Aggregate) reinforced with and including 8.0mm dia TMT Bars @ 100mm centre to centre both ways, GI Wire Mesh, Funnel, 20mm bore Medium Grade GI Watering Pipe, necessary Excavation in Soft/Loose Soil, returning, filling in and removal of surplus Spoil upto a distance of 50.00 m and all as shown in Electrical Plate No. 5 of MES Schedule Part-I and Testing on completion including taking down unserviceable Earthing ,complete all as specified and directed by the Engineer-in-Charge.

Supply and fixing for 12mm dia, 600mm long, single pointed air termination aluminium rod including taking down of existing one and making good the disturbed surfaces complete all as specified and as directed.

Supply and fixing for single aluminium strip of size 25x3.15 mm in proper position with saddles and fixing screws for roof conductors and down conductors from top of the building air termination point to the test point of the building of height G+1 to G+12 as required after and including taking down of the old unserviceable one and making good the disturbed surface complete all as specified and as directed.

Supply and fixing in replacement galvanised iron strip of size 32 X 6 mm as earth continuity conductor or main earthing strip fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed with poles or any other indicated sitution for loop earthing etc as required complete all as specified and as directed.

Supply and fix for Copper strip 25 x 3.15mm with saddles and fixing screws etc. for roof conductors and down conductors above ground

Material and labour for test point terminal block made of gun metal or phosphorus bronze of size 75x75x25mm drilled and screwed including 3 Nos 8mm dia 25mm long hexagonal head screw after and including dismantling of existing unserviceable one complete all as specified and as directed.

Supply and fixing for integral LED avaiation light fitting of capacity 10-20W suitable for 240V AC 50Hz supply with operating input voltage 102 -270V AC complete with short circuit and surge voltage protection and having ingress protection class IP-65 (Min) comprising of aluminium hsg with polycarbonate enclosure and having LED not less than 300 Nos rigidly mounted on 300mm long GI pipe of suitable diameter fixed on a GI flange duly fixed on the roof of overhead tank/Bldg with anchor bolt all as specified and directed.

Supply and fix for galvanised iron strip 25X4 mm as earth continuity conductor or main earthing lead 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 loop earthing etc. as required

S & F for GI Plate of size 250x200x2.00 mm duly mentioning the date of testing and testing result for earth Pit, Painted with synthetic enameld paint in black colour, dualy fixed on PCC coping (1:2:4) fitted with nut bolt washers including digitally writing the Earthing data with suitable size letters complete all as specified and directed.

M & L for testing of earth pit by providing one suitable technician with Helper with Earth testing equipment after opening the strip from the test point, testing, recording the results, reconnectioning of strip, cleaning and Watering the earthing pit etc complete all as specified and directed.

M&L for PCC (1:3:6) type C1 chamber of size 45cm X 45cm X 45cm including, 50 mm thick RCC 1:2:4 type B1 earth pit cover with 6 Nos, 8 mm dia high strength deformed steel TMT bars on both ways complete all as specified and directed.

Supply and fixing in replacement MS funnel with wire mesh of earth pits including taking down old unserviceable funnel from existing earth pit complete all as specified and directed.

M&L for CPVC stop cock suitable for 25mm CPVC pipe connections including fittings etc complete all as specified and directed.

M&L for CPVC stop cock suitable for 15mm CPVC pipe connections including fittings etc complete all as specified and directed.

Supplying and laying of CPVC pipes of 16mm dia SDR 11 & Plain CPVC SDR 11 fittings in trenches complete all as specified and directed.

Supplying and laying of CPVC pipes of 20mm dia SDR 11 & Plain CPVC SDR 11 fittings in trenches complete all as specified and directed.

Supplying and laying of CPVC pipes of 25mm dia SDR 11 & Plain CPVC SDR 11 fittings in trenches complete all as specified and directed.

Supply and fixing 40mm bore steel tubes "light grade" galvanized with all fittings and fixed to wall after and including taking up or down existing unserviceable GI Pipe complete all as specified and as directed.

M&L for cutting the existing pipe line up to 40mm and inserting Tee of suitable size complete with threading for making new branch connection of 20mm dia CPVC pipe including necessary fittings, necessary excavation and earth work complete all as specified and directed.

Excavation in trenches not exc 1.5 m in depth and not exc 1.5 m wide for taking out/laying CI/GI pipes and getting out in soft/loose soil complete all as specified and directed.

Removing excavated soil at a distance not exc 50 m and deposited where directed at a level n.exc 1.5m above the starting point complete all as specified and directed.

Returning,filling in including spreading, leveling, watering and well ramming in layers not exc 25 cm complete all as directed

M&L for cutting of road / hard standing upto 0.3m in depth and 0.45m wide for laying of cable protection pipe including refilling, watering, well ramming and finishing with PCC 1:2:4 and matching with surroundings, removing the broken P.C.C / road materials and clearing the site complete all as specified and as directed.

Supply and fix for out door type weather proof test point box with hinged door locking arrangement, made of 3.0 mm thick MS sheet of size 250 x 200 x 150 mm comprising of capper bar of size 25 x 6 mm and 200 mm long mounted on FRP/DMC insulators, duly fixed inside the box mounted on 40 x 40 x 4mm angle iron legs (02 Nos) with a clearance of at least 0.30 mtrs above GL and 0.30mtrs below ground including PCC for foundation complete all as specified and directed.

DEB AND COMPANY

THE PLANTERS ENGINEERING CORPORATION

DILIP CONSTRUCTION

Shanti Construction Company

NUPUR CONSTRUCTION

KWALITY CONSTRUCTION