Three-phase power is essential for many commercial and industrial operations. We explain what it is, who needs it, and how to get it installed.
Most homes and small businesses in the UK run on single-phase power — a standard 230V supply. But for businesses with high-power equipment, three-phase power is often essential. Here's what you need to know.
What Is Three-Phase Power?
Three-phase power delivers electricity via three separate conductors, each carrying an alternating current that is offset by 120 degrees from the others. This provides a more consistent, efficient power supply and allows for much higher loads.
A single-phase supply typically provides up to 100A (around 23kW). A three-phase supply can provide up to 100A per phase — giving a total capacity of around 69kW or more.
Who Needs Three-Phase Power?
- ✓Workshops and manufacturing facilities with heavy machinery.
- ✓Commercial kitchens with multiple high-power appliances.
- ✓EV charging hubs with multiple rapid chargers.
- ✓Data centres and server rooms.
- ✓Agricultural businesses with large motors and pumps.
- ✓Commercial air conditioning systems (VRF/VRV).
- ✓Welding and metalworking operations.
How Is Three-Phase Power Installed?
The process involves: 1. Applying to your Distribution Network Operator (DNO) — in Essex, this is UK Power Networks — for a three-phase supply. 2. Installing a new three-phase meter and consumer unit/distribution board. 3. Wiring the premises for three-phase distribution.
The DNO application process can take several weeks, so it's important to plan ahead. Future Smart Electrical manages the entire process on your behalf.
Cost Considerations
The cost of a three-phase installation varies depending on the distance from the nearest three-phase supply, the size of the premises, and the complexity of the internal wiring. We provide detailed, transparent quotes with no hidden costs.
Contact Future Smart Electrical today to discuss your commercial power requirements across Essex.