Important
This is a general explanation only.
Power supply and wiring requirements can vary depending on the machine and the installation.
We recommend confirming all electrical requirements with a qualified electrician before installation.
Three phase power is the standard electrical supply used in most industrial workshops and factories.
Instead of a single active wire (as in household power), three phase power uses three active wires, often referred to as phases.
This provides:
- Smoother and more consistent power delivery
- Greater efficiency for running electric motors
- The ability to operate larger and more powerful machines
Most industrial machinery is designed to run on three phase power for these reasons.
Why Do Some Machines Need a Neutral?
In addition to the three active phases, some machines also require a neutral wire.
The neutral is used to supply standard voltage (240V) within the machine.
This is typically needed for:
- Control circuits
- Work lights
- Digital readouts (DROs)
- Contactors and relays
- Other low-power components
Why This Matters
Not all three phase supplies are the same.
Some sites have:
- 3 phase + neutral (more versatile)
- 3 phase only (no neutral)
If a machine requires a neutral and one is not available, it may:
- Not operate correctly
- Require electrical modification
- Need additional components (such as a transformer)
