Public Works Department Tender

b-1Maintenance free earthing . long life maintenance free electrolytic earthling system with 10 feet vertical k type copper not less then 2”(50.8mm)ID and not less than 0.08”(2.03mm) wall thickness ,which does not require manual addition of water .The system should be corrosion resistant pre-filled with hygroscopic powder and provided with suitable breathing and leaching ports at the ends. Rated for high fault currents bas bar rated for 10KA, fault current bus bar connection type as “Terraweld” to with hold temperature of 7000C.The earthling port shall be designed and supplied with poly plastic port cover non conductive, environment friendly and lockable. The job includes pit digging, installation of the rods, filling earth, leveling and disposal etc. i98Required size copper strip as per site requirement.

b-2Electric wiring and lighting Light point shall be provided in the lift well at a space not exceeding 3m. all the light point shall have control from the machine room with proper switches and conduits.Socket outlets may also be provided at a suitable place for use by the maintenance staff above the ground floor landing.

b-3Cabling (Supply and laying of the following 1100 volts grade, Copper conductor, XLPE insulated, PVC sheathed, armoured cables as per IS 7098 Part-1) 10-sqmm, 4-core armoured cable with copper conductor from auxiliary control panel to be installed at main control room outside the building to the machine room with proper lugs/thimbling.

b-4 Main control Panel LT CONTROL PANEL: Fabrication, Supply, Installation, Testing and Commissioning of dust, damp and vermin proof free, floor mounted with base channel, Indoor type factory built sheet steel enclosed modular construction panel, suitable for operation on 415 ±10% volts, 50 Hz AC 3 phase 4 wire system fabricated out of suitable sized square tubular section and covered with CRCA sheet steel of 2mm thick for frame work and covers, 3mm thick for gland plates i/c cleaning & finishing complete with 7 tank process for powder coating in approved shade. All the MCCB up to 250 Amp shall have thermal release with adjustable overload, short circuit & earth fault protection Take Bus-Bar Density:0.8A/mm2 Bus Bar Rating 100A Incoming 1) 100 A 4p Changeover Switch = 01 No. 2)100A, 38 KA, Four Pole MCCB=1No (HIM 125 Frame: Adjustable thermal & Fixed Magnetic Setting) 3) 100A TPN ALU.BUS BAR. Size of Bus bar (30mm x 6mm)=01Set 4) Indication Lights= 01Set 5) Digital Voltmeter (0-500V)for input and output, selector switches to read input/output voltage in each phase1No. 6) Digital Ammeter (0-100A) = 01No. 7) CT for Ammeter 100/5A Ratio Frequency meter= 01Set 8) Selector switches = 01 Set Outgoing 1) 40A, 26K A, Four Pole MCCB= 04No (HIM 125 Frame: Adjustable thermal & Fixd Magnetic Setting) CABLING