Cables for Industrial Plants & Manufacturing
An unplanned shutdown on a production line doesn't just stop output — it cascades. Raw materials spoil, delivery schedules slip, penalty clauses activate, and maintenance crews scramble to trace a fault through kilometres of cable tray at 2 AM. For plant engineers specifying cables for new factories or rewiring projects, the goal is decades of uninterrupted operation with zero cable-related failures.
Cable Requirements
Industrial manufacturing facilities impose sustained electrical and environmental stresses that distinguish their cable requirements:
High Current Capacity
Large motors, furnaces, and compressors draw hundreds of amperes. Cables must be sized for steady-state current, motor starting surges, and harmonic heating from VFDs.
Thermal Management
Cables in enclosed trays experience derating from mutual heating. Ambient temperatures near furnaces can exceed 50°C. XLPE rated for 90°C continuous is standard.
Chemical & Oil Resistance
Exposure to oils, solvents, cutting fluids, and cleaning chemicals. PVC sheaths provide reasonable resistance; severe exposure may need specialized compounds.
Electromagnetic Compatibility
VFDs generate high-frequency switching noise. Dedicated VFD cable with symmetrical ground conductors and overall shielding is required for drive-to-motor connections.
Mechanical Protection
Cables crossing traffic areas or in forklift zones need SWA armoured construction or steel conduit/trunking installation.
Fire Performance
Bunched cable installations require IEC 60332-3 compliance. Critical safety circuits need fire-resistant cables maintaining circuit integrity during fire.
Recommended Products
XLPE Power Cable (Low Voltage)
Cu/Al conductor, XLPE insulated, PVC sheathed for main distribution, motor feeders, and bus-tie connections. 1.5mm² to 630mm².
Steel Wire Armoured (SWA) Cable
XLPE/PVC insulated with SWA for cable runs across open areas, direct burial between buildings, and exposed installations.
Control Cable
Multi-core (2–61 cores) for process control, instrumentation, PLC I/O wiring, and BMS. Available shielded and unshielded.
Fire-Resistant Cable
Mica-tape insulated, 30–120 min circuit integrity. For fire alarms, emergency lighting, smoke extraction fans, and shutdown systems.
Rubber Flexible Cable
For connections to vibrating equipment, portable machinery, overhead cranes, and applications requiring repeated flexing.
Standards & Certifications
| Standard | Description |
|---|---|
| IEC 60502-1 | Power cables with extruded insulation, rated voltages 1kV to 3kV |
| IEC 60502-2 | Power cables with extruded insulation, rated voltages 6kV to 30kV |
| IEC 60228 | Conductors of insulated cables (classes 1, 2, 5, 6) |
| IEC 60332-3 | Flame propagation test for bunched cables (Category A, B, C) |
| IEC 60331 | Fire resistance test — circuit integrity |
| GB/T 12706 | Cables for rated voltages 1kV to 35kV (Chinese national standard) |
| GB/T 9330 | Control cables of rated voltage 450/750V |
| BS 5467 | Armoured cables with thermosetting insulation up to 3.3kV |
Typical Specifications
| Application | Voltage | Conductor | Insulation | Notes |
|---|---|---|---|---|
| Main bus feeder | 0.6/1kV | 3×240–630mm² + N | XLPE | SWA |
| Motor feeder (large) | 0.6/1kV | 1×95–400mm² (×3+E) | XLPE | Single-core |
| Motor feeder (small) | 0.6/1kV | 4×4–25mm² | XLPE | SWA |
| VFD to motor | 0.6/1kV | 3×4–120mm² + 3×E | XLPE (shielded) | Symmetrical ground |
| Process control | 450/750V | 7–37 core × 1.5mm² | PVC/XLPE | Screened |
| Fire alarm / emergency | 0.6/1kV | 2–4 core × 1.5–2.5mm² | Mica + XLPE | Fire-resistant |
| Lighting & auxiliary | 450/750V | 3×1.5–4mm² | PVC/PVC | — |
| Crane / portable equipment | 0.6/1kV | 4×6–50mm² | Rubber | Flexible |
Frequently Asked Questions
- What cable do I need between a VFD and motor to prevent electromagnetic interference?
- Use a symmetrical cable with three power conductors, three symmetrically arranged ground/earth conductors (minimum 50% of phase conductor size), and a continuous overall copper braid screen. This provides a low-impedance path for common-mode currents. Keep VFD cables separated from control cables by at least 300mm.
- Should I use copper or aluminium conductor for factory power cables?
- For main distribution above 95mm², aluminium offers significant cost savings. For smaller cables (below 50mm²), motor branches, and flexible applications, copper is preferred. In corrosive environments or where space is limited, copper's smaller diameter can justify its premium.
- What fire performance rating is required for cables in industrial buildings?
- Most codes require IEC 60332-3 Category C minimum for bunched installations. Critical safety circuits need fire-resistant cables tested to IEC 60331 (30, 60, or 120 minutes). LSZH cables are specified where smoke density in enclosed spaces is a concern.
- What documentation do you provide with industrial cable shipments?
- Routine test certificates per IEC 60502, material certificates for conductors, and declaration of conformity. Type test reports from accredited labs available on request. For full QA, we provide ITPs, FAT invitations, and third-party inspection coordination.