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Three-phase power installation

A machine, a welder, a professional kitchen or a fast charger needs 400 volts. We check what your main supply can carry, run the power circuit and fit the connection that goes with it.

ForWorkshops, businesses, garages
Voltage400 volts, 3-phase
TypeCEE socket or hard-wired
StandardNEN 1010

Three-phase power installation: how we work

What three-phase power is

Three-phase power is 400 volts across three phases, against the 230 volts of an ordinary socket. Heavy equipment runs more steadily on it and draws less current per wire. You recognise it by the round blue or red CEE sockets.

Calculate first, install second

The question is not only whether we can run a circuit, but whether your main supply can carry it. We add up what is already connected, look at the main fuse and say whether an upgrade is needed. We handle that application with the grid operator.

Hard-wired or socket

A machine that always stands in the same place we wire in directly, with an isolator switch beside it. If the equipment changes, a CEE socket is more practical. We discuss beforehand what works in your situation.

In commercial buildings

We schedule the work outside your opening hours, so production or the shop can carry on. With a distribution board we supply a schedule, so the next engineer knows what sits where.

Send us your situation with a few photos and you will have a clear quote with a fixed price within 24 hours.

Frequently asked questions about three-phase power installation

Question not answered here? Call or message us and we will think it through with you, free of charge.

Do I need three-phase power?

Check the rating plate. If it says 400V or 3~, yes. Above roughly 3.7 kW it is almost always sensible, even if the appliance can run on 230 volts.

What does upgrading the supply cost?

The grid operator sets that tariff, not us. We prepare the fuse box and file the application; their quote covers the price and the waiting time.

Can you run power to my shed?

Yes. We lay armoured cable at the correct depth, on its own circuit with its own protection. We can take care of the digging.

How long does it take?

A power circuit within the same building is often a day. If digging is involved or the supply has to be upgraded, the schedule depends on the grid operator.

More from wiring & installation

Rewiring a house Perilex socket installation Induction hob connection Socket installation Lighting installation see our service area

Need help with three-phase power installation?

Tell us what needs doing and add a photo, and you will have a fixed price within 24 hours. Available on working days from 08:30 to 17:00, and outside those hours for emergencies.

Call 085 212 8234 Request a quote