MAINS POWER CABLE 5 CORE 4MM
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5 Core 4mm² Flexible Three-Phase Power Cable — Black Sheath (Sold Per Metre)
Product Description
The 5 core 4mm² flexible cable is a heavy-duty three-phase power cable designed for connecting welders, industrial machinery, and workshop equipment to 415V supply. Each of the five cores — three phases, neutral, and earth — uses finely stranded tinned copper conductors, giving the cable the flexibility to handle constant movement, coiling, and vibration without conductor fatigue. The tough black outer sheath resists oil, abrasion, and the general punishment of a workshop floor, making it the go-to choice for trailing leads, machine tails, and three-phase extension leads.
Colour-coded cores (green/yellow earth, blue neutral, and brown, black, and grey phases) follow the standard identification used across Australian three-phase installations, so termination into plugs, sockets, and machine terminals is quick and unambiguous. Because the conductors are tinned, the cable also resists corrosion in humid, coastal, and marine-adjacent environments — a real advantage for Queensland workshops and site work.
Whether you're building a three-phase extension lead for a MIG welder, re-tailing a compressor, or running flexible supply to HVAC and pump equipment, this cable delivers the current capacity of 4mm² conductors with the handling ease of a fully flexible construction.
Key Features
- Three-phase ready: Five cores covering three phases, neutral, and earth in a single cable
- Tinned copper stranding: Superior flexibility, vibration resistance, and corrosion protection
- Heavy-duty sheath: Black outer jacket resists oil, moisture, abrasion, and mechanical stress
- Standard AU colour coding: Green/yellow, blue, brown, black, grey for fast, compliant termination
- Cut to length: Sold per metre so you only buy what the job needs
Technical Specifications
| Feature | Specification |
|---|---|
| Cores | 5 (3 phase + neutral + earth) |
| Conductor size | 4.0mm² |
| Conductor type | Flexible tinned copper, multi-strand |
| Core colours | Green/Yellow (E), Blue (N), Brown, Black, Grey (phases) |
| Voltage rating | 450/750V |
| Sheath | Black, oil and abrasion resistant |
| Typical use | Welders, machinery, three-phase extension leads, HVAC, workshop power |
Frequently Asked Questions
What is 5 core 4mm² cable used for? 5 core 4mm² flexible cable is used to supply three-phase equipment such as welders, air compressors, machine tools, and HVAC units. The five cores carry three phases, neutral, and earth, making it the standard choice for building 415V extension leads and machine tails.
What amperage can 4mm² five core cable handle? As a general guide, 4mm² flexible cable supports circuits up to around 25–32A depending on installation method, ambient temperature, and cable length. Always size the cable to the circuit protection and confirm against AS/NZS 3008 current ratings for your installation conditions.
Why are the conductors tinned? Tinned copper resists oxidation and corrosion far better than bare copper, which matters in humid Queensland conditions, coastal workshops, and anywhere the cable ends may be exposed to moisture. Tinning also improves solderability and long-term terminal reliability.
Can I use this cable for a three-phase welder extension lead? Yes — this is one of its most common applications. Pair it with a quality 415V plug and socket rated to match your welder's supply current, and keep the lead as short as practical to minimise voltage drop on high-amperage machines.
What do the core colours mean? Green/yellow is earth, blue is neutral, and brown, black, and grey are the three phase conductors, in line with standard Australian fixed wiring colour identification.
Pairs Well With:
- 415V three-phase plugs and sockets (20A / 32A)
- Cable glands and strain-relief fittings
- Three-phase MIG and TIG welders requiring extension lead
