What is Single Phase Power?
Single phase electricity is the standard domestic supply in the UK, typically 230V. It’s suited to smaller loads and simpler installations.
- Common in homes and small offices
- Good for lighting, heating and small equipment
- Simpler wiring
- Lower overall power capacity
Single phase generators are ideal for residential backup and small commercial units.
What is Three Phase Power?
Three phase electricity is typically 400V and is used for commercial and industrial environments. It provides smoother power delivery and supports higher demands.
- Smoother, more consistent power delivery
- Handles larger electrical loads
- Often essential for heavy machinery and motors
- Efficient for high-demand sites
Key Differences at a Glance
| Feature | Single Phase | Three Phase |
|---|---|---|
| Voltage (UK) | 230V | 400V |
| Typical use | Homes, small offices | Commercial & industrial |
| Motor performance | Lower starting efficiency for large motors | Smoother starting and running |
| Power capacity | Lower | Higher |
Why Load Balancing Matters
With three phase generators, loads should be shared as evenly as possible across all three phases. Unbalanced loading can cause overheating, poor performance and potential alternator damage.
Freeman Energy can help confirm the correct phase selection and advise how to distribute loads during installation and commissioning.
