Turnkey Projects

Types of Projects We Undertake :

Main Features of Our Services :

• Design and conceptualization based on customer's conceptual design and specifications
• Preparation of bill of quantities, tendering
• Preparation of detailed drawings, site set out
• Sourcing of material
• Marking and execution in accordance with the design
• Obtaining finished levels
• Evaluation and submission of progress report
• Execution of planting schemes
• Total commissioning

Procedure For Laying Down LT & HT Cables :

Storage of Cable Drums :

• We store the cable drums on a well-drained and hard surface.
• For long terms storage, these drums are covered with tarpaulin, and both ends of the cable are sealed.
• If required, we also roll these through 90o

Selection of Cables :

• In general, we prefer to use PVC/XLPE insulated and PVC sheathed cables.
• For very high voltage (from 11KV to 33KV) we prefer cables with the solid or stranded Aluminum conductor; Copper conductor can be used only in special applications where the use of Aluminum conductor is not technically acceptable.
• We prefer only those multi-core cables that are properly armored to prevent any kind of mechanical damage.

Safety Precautions :

• Where necessary, we display a caution board indicating CAUTION - CABLE JOINTING WORK IN PROGRESS to warn the public and traffic.
• Before starting jointing, we take all safety precautions like isolation, discharging, earthing, display of caution board on the controlling switchgear, etc. to ensure that the cable would not be inadvertently charged from the live supply.

Cable Handling and Laying :

• We ensure that both ends of the cable are properly sealed to prevent ingress/absorption of moisture.
• Even for short distances, we roll the cable drums in the direction of the arrow marked.
• Before we remove the cable from the drum, we mount the latter properly on jacks or cable wheels.
• Our cabling does not have sharp bends. Instead, we make the bends rounded at corners to a radius not lesser than 12 times the overall diameter of the cable, thereby avoiding any damage to cables.
• We avoid taking a risk and discard defective cables like those with sharp bends and defective armoring etc
• We dig separate trenches for power and control cables. But if that be not possible for any reason, we lay first HV cables and over that the LV cables with adequate separation.
• We lay down power and communication cables at right angles or give clearance of a minimum of 60 cm.
• We always try to avoid waterlogged locations, carriage-ways, payments, areas in proximity to telephone cables, gas and water mains, inaccessible places, etc.
• In areas where there is a chance of damage to wiring/cables, we always provide a proper metallic protective covering.
• While cutting and stripping the outer sheathing of the cable, we always take the utmost care not to allow the sharp edge of the cutting instrument to touch the inner insulation of the conductor.

Cable Jointing & Termination :

• Prior to laying down cables, we decide about ideal locations for proposed joints. As far as possible, we try to avoid waterlogged locations, carriageways, pavements, proximity to telephone cables, gas or water mains, inaccessible places, ducts, pipes, and racks, etc.
• When joints are to be done for two or more cables laid together in the same trench, we stagger these by 2m to 3m.
• We keep the cable joints in suitable and approved cable joint boxes, making sure that these do not allow entry of moisture. We also try to leave about 3m long surplus cable on each side of the joints.
• We give preference to heat shrinkable joints that have high insulation at jointing ends. In any case, we always ensure that there is a solid connection between the metal conductor and terminating clip.
• Our cables are terminated on to the terminals of switchgear through heavy-duty crimping lugs of proper size.
• In order to maintain continuity of cable armoring, we use double compression glands and proper crimping tools.
• In Aluminum cables exposed to the outside atmosphere, we remove the oxide film before joining.

Trenching & Cable Laying :

• Our trenches for cable laying are straight or with suitable curvatures and with changes in depth gradient being gradual. These have a minimum width of 45 cm and a depth of 75 cm. The bottom of the trench is always kept free of stones and bricks.
• When there is more than one cable in a single trench, we ensure that these are kept at a distance.
• We give a minimum of 9 cm dry sand cushion below and above the cables. Over the topmost layer of sand cushion, we put one layer of bricks as an extra protective covering, and over that put back the excavated soil free from stones and debris. In order to avoid the chances of any waterlogging, our trenches have about 10 cm hump on top with tapering on sides.
• At entry/exit cable points into the building, we pass the cables through pipe sleeves, which are properly sealed to prevent the entry of any seepage water.
• Our manholes are large enough to have sufficient working space and for feeding/drawing of cables.
• We always leave sufficient cable loop length that is a must.

Manholes :

Cable Trays :

• Insulation resistance test
• Continuity resistance test
• Sheathing continuity test
• Earth test (in armored cables)
• Hi-Pot test

• Insulation resistance test (sectional and overall)
• Continuity resistance test
• Sheathing continuity test
• Earth test
• High voltage test (only in case of HT cables)

Cable Tags :

• We give proper marking to each cable in all critical places using Aluminum cable tags of sufficient thickness and size.

Earthing :

• Earthing of non-current carrying metal parts: We bind together and provide proper earthing to all non-current carrying metal parts like metal conduits, trunking, cable armoured switchgear, distribution fuse boards, light fittings, etc. We ensure that earthing is in conformity with relevant Indian Electricity Rules and Indian Standard Specifications.
• Earthing Conductor: Our earthing conductors are of high conductivity Copper and protected against mechanical injury or corrosion.
• Size of Earthing Conductor: We use 1.5 sq mm PVC insulated copper wire for earthing all fixtures, fans, outlet boxes, and junction boxes. All single phase metal clad switches and distribution boards are earthed with a 4 mm dia (6 SWG) bare Copper wire. All 3-phase switches and distribution boards up to 60 A rating shall be earthed with 2 Nos. distinct and independent 4 mm dia (8 SWG) bare GI wire. All switches, bus bars, ducts and distribution boards of rating 200 A and above shall be earthed with a separate and independent 25 mm x 3 mm GI strip.
  Connection of Earthing Conductors: We take the main earthing conductor from the earth connection at the main distribution panel to the earth electrode with which the connection is to be made. For distribution boards, earthing conductors are made to run from the main distribution board.
• Artificial Treatment of Soil: If the earth resistance is too high and the multiple electrodes earthing does not give adequate earthing, we reduce and adjust the resistance of the soil immediately surrounding the earth electrode by adding sodium chloride, calcium chloride, sodium carbonate, copper sulfate, salt and soft coke or charcoal in suitable proportions. We make sure that the earth resistance does not exceed 1.0 ohm.
• Inter-connection of All Earths: We inter-connect all earth, including transformer neutrals, transformer body, LT & HT Panels, lightning protection system earth, UPS earth, etc.
• Prohibited Connections: We never use water pipes, sprinkler pipes, gas pipes, structural steelwork, metallic conduits, and lightning protection system conductors as an earthling conductor.

Maintenance Free Chemical Earthing :