Electrical Works

Amount

Supply, erection, testing and commissioning of 400A Copper Raising main made up of 16 SWG sheet steel minimum thickness of 1.8 mm bolted on to an angle iron / structural steel framework.covers the requirements of 3 phase 415 V, 50 Hz, 400A continuous rated, copper TPN bus duct shall be designed for indoor type. The Bus – duct shall be designed for the above current ratings. The Bus – bars shall be 50mm x 6mm copper Bus- bars shall be of uniform cross section along its entire length. No tapering of the bus bars’ cross-section is allowed. The bus duct shall be painted after suitable pretreatment of all structural steel and latest with anti-corrosive epoxy base primer paint & two coats of pebble / flint gray shade and dried in a oven.The enclosure shall conform to IP: 54 for indoor, as per Indian Standards.The inner surface of the Bus – duct shall be coated in the powder coating The bare bus –bars shall be provided with a coat of Matt finish. The joints in the Bus –bars shall be of the bolted type and it shall be ensured that the following precautions are observed. 1) The contact pressure must be ample and this shall be maintained during the time the panel is in service 2) The surfaces of the conductors must be clean With flat conductors.3) The overlap should be equal to or greater than the width of the bars

4)The joints shall be treated duly for joint compound to render the joint moisture-proof 5) For the joints use of bolts of cadmium plated high-tension MS bolts having expansion characteristics due to temperature change with steel nuts. 6) Smearing the surfaces with oxide inhibiting grease just prior to making the joint in order to preserve the efficiency of the joints.Minimum phase and earth clearance required shall be maintained at joints. The joints shall be thoroughly shrouded.The Bus bar arrangement shall generally conform to IS: 5578 and S:11353. The Bus bar arrangement shall be generally confirm to IS:5578 and IS:11353.The 2Runs of Bus-bars to be stacked together or the spacing between them shall be maximum of the thickness of one conductor. The busbars shall be phase identified by colour, at intervals. Colour code shall be RED, YELLOW and BLUE for phase and BLACK for the neutral Bus- bar. The Bus-bars shall be supported on tough, non-hygroscopic, resin Bonded self-extinguishing fire retarded insulators preferably of SMC / DMC with ribbed construction to prevent tracking due to dust paths.The Bus-bars and supports shall withstand the maximum stress that are induced in the event of short-circuit current . The bus-bar support shall be a minimum interval of 500mm. 5C above the ambient temperature The clearance between the individual bare phase power bus bars and between the phase and earth Bus-bars in air shall be not less than 25 mm respectively.

Supply & fixing of hard drawn copper Refrigerant piping of suction line of Size 7/8” inches with necessary fitting and clamp etc.

Supply & fixing of hard drawn copper Refrigerant piping of liquid line of size 5/8” inches with necessary fitting and clamp etc...

Supply and fixing of flexible canvas connection between indoor unit and ducting and rubber pads, with ceiling Support angle rods etc.

Supply, Fabrication and Installation of Aluminium Ducting arrangement with necessary angle supports, anchor fasteners and threaded rods etc. as required

Supply and Providing Thermal Insulation of 9mm thick –XLPE with aluminium foil./ Nitrile Rubber insulation

Supply & providing of control supply for Outdoor unit to Indoor unit HP and LP cut-outs with 7 core 1.5sq.mm copper flexible cable

Supply and fixing of 24W LED 2x2 square type Recessed fitting with LED (Higher end) on false Ceiling with suitable hanging support from ceiling with PVC unsheathed copper leads from terminals to the fitting.

Supply and Laying of 3 1/2 x 240 sq.mm. PVC armoured LTUG cable in suitable size HDPE pipe in a trench to be excavated at a depth of 0.75 metre and refilling the earth to make good.

The switch should be separated by 6mm thick hylem sheet separators and properly (double) earthed as per IE rules, CEIG specification. The panel should be powder coat painting Siemens grey complete with LED Digital Display for VAF Meter chamber. The cable size, capacity of switch and location should be marked with white paint .

GST at 18%

SREE PADMAVATHI ELECTRICALS (BID ID -1548918)