Industrial Power & Control Cables in Pakistan

Power cables connect transformers, main distribution boards, MCCs and individual loads. In industrial use they are most often multi-core or single-core copper or aluminium conductors with PVC or XLPE insulation, an inner bedding, optional armour and an outer PVC sheath.

XLPE insulation allows a higher continuous conductor temperature than PVC, which usually means a higher current rating for the same size. Armoured constructions (SWA for multi-core, AWA for single-core AC circuits) are used for direct burial and mechanically exposed routes.

Control cables carry low-power control and interlock signals between panels, field devices, pushbuttons, solenoid valves and motor starters. They are multi-core, usually with smaller conductors (commonly 1.5 mm² and 2.5 mm²) and numbered or colour-coded cores so terminations can be traced.

Where control circuits run alongside VFD outputs or heavy power cables, an overall screen helps limit interference. Armoured control cable is used for outdoor and buried field routes.

Instrumentation cables carry 4–20 mA, RTD, thermocouple-extension and digital signals from transmitters and sensors back to PLCs and DCS systems. They are built as twisted pairs or triads to reject noise, with either individual and overall screens or an overall screen only.

Signal integrity, not current capacity, drives the choice. Individually screened pairs reduce crosstalk between channels; a drain wire allows the screen to be earthed at one end as instrumentation practice usually requires.

Flexible cables use finely stranded conductors (class 5 or class 6) so they can bend repeatedly without fatigue. They connect portable tools, welding sets, hoists, moving machine parts and equipment that must be disconnected and moved.

Rubber-sheathed and PVC flexible cables suit different duties: rubber or PUR sheaths handle abrasion, oil and repeated flexing better, while PVC flexibles suit lighter fixed or occasional-movement use.

Cable glands secure a cable where it enters an enclosure, motor terminal box or junction box. They provide strain relief, seal against dust and water, and on armoured cable they clamp and earth the armour.

Common types include nylon glands for unarmoured cable in light duty, brass glands for industrial and armoured cable, and certified glands for hazardous areas where the gland must match the protection concept of the equipment.