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Conductor The conductor is made of electrolytic grade high conductivity annealed copper or electrolytic grade aluminium. Generally, all power cables have aluminium as the conductor material, while control cables have copper. However power cables with copper conductor can be offered on request. Insulation The insulation is suitably compounded PVC applied to the conductors by the extrusion process. For normal application PVC insulation Type A (70°C) and for HR PVC insulation Type C (85°C) as per IS:5831 (1984) is provided. Laying-up All multi-core cables are laid-up with thermoplastic fillers in the interstices wherever applicable to make the cable circular. Inner Sheath The laid-up cores are surrounded by an inner sheath of any of the following types :
Armouring Depending upon the application, these cables can be armoured or unarmoured. When armouring is desired for single-core cables for using for a.c. system, the cable should be armoured with non-magnetic material. If the single-core cables are to be used in d.c. system, the cable can be armoured with steel wire/strip. Outer Sheath The outer sheath is of suitable grade of PVC compound applied by extrusion method. The colour of the outer sheath is generally Black. Outer sheaths colour other than black can be supplied for special applications. Our Manufacturing Range
In addition to the above, PVC insulated cables as per International Standards can also be manufactured. |
M.E.M. Industries offers a wide range of LT PVC insulated Power and Control cables with Copper as well as Aluminium conductors. The insulation of normal PVC or HR PVC can be offered. Special purpose FRLS compound for inner as well as outer sheath can be offered on request. Following are the standard constructional features of PVC Insulated Heavy Duty Cables as per IS: 1554 (Part- 1)