Refinery and process plant cable

No. National Cables manufactures IS 694:2010 and IS 17048:2018 low-voltage cables (≤1100 V) for non-Ex-rated building services and refinery utilities — admin blocks, control rooms, MCC and LT panel internal wiring, instrumentation in safe zones, and lighting circuits.

For Zone 1 / Zone 2 hazardous-area applications requiring ATEX or IECEx certification, specify a cable manufacturer with explicit Ex-rated product certification. Our scope is the non-Ex utility and building services portion of refinery and petrochemical complexes.

Where project specifications reference 0.6/1 kV unarmoured cable (e.g., NYY), IS 694:2010 1100 V-class insulation provides margin for motor-starting surges and switching transients common in refinery plant. Both share IEC 60228 Class 5 conductor geometry — the BIS 1100 V certification is the differentiator.

For international tenders, National Cables also supplies NYY-J / NYY-O (IEC 60502-1, 0.6/1 kV) from the same BIS-certified line — enabling specification flexibility on GCC and African petrochemical schedules.

IS 8130:2013 Class 5 flexible conductor is mandatory for MCC and LT panel internal wiring throughout. Class 5 fine-strand construction handles repeated bending during assembly, commissioning, and maintenance without conductor work-hardening or fracture.

National Cables supplies IS 694:2010 Single Core Flexible (Class 5) in FR or FR-LSH grade, sizes 0.5–240 mm². For instrumentation runs alongside VFD or high-current feeders, specify screened control cable (aluminium foil + tinned drain) with single-point screen earthing per the EMC plan.

Specify screened multicore control (foil + drain) for any 4–20 mA loop, RTD signal, or low-voltage measurement circuit running parallel to VFDs, motor feeders, or other high-current sources. Unscreened Class 5 multicore is acceptable for digital I/O on segregated tray runs where EMI exposure is low.

The decision is per the EMC plan, not per cable cost. An unscreened analogue loop adjacent to a high-current feeder will pick up sufficient noise to corrupt the signal — and the failure presents as inconsistent measurement, not an obvious wiring fault.

Yes. The export portfolio includes NYY-J / NYY-O (IEC 60502-1, 0.6/1 kV) for unarmoured power, H07V-K (IEC 60227-3, 450/750 V) for international panel wiring, and YY Control Cable (EN 50525-2-11) for unscreened multicore — all produced from the BIS 1100 V-class certified line.

This enables seamless specification on refinery MEP schedules in GCC, African, and emerging-market petrochemical projects. Material declarations and IEC type-test reports are issued in international tender format. Note: scope remains non-Ex utility and building services.