Three-phase power & industrial installations
For factories, workshops, plant rooms and any premises running motorised machinery, three-phase 415V supply is the standard. We design, install and certify three-phase distribution from incoming supply through to machine connection, including motor control, soft-starts, inverters and emergency-stop circuits.
- DNO liaison for new or upgraded incoming supplies
- Main and sub-distribution boards (TP&N)
- Motor control gear and starters
- Variable-speed drives and inverters
- Emergency stop and lock-off systems
- CompEx-certified install in hazardous-area zones
Manufacturing and engineering firms, food production, workshops and fabricators, plant rooms running heat pumps or large HVAC, and anyone installing CNC machinery, lathes, presses or large compressors.
We hold CompEx (Competence in Explosive atmospheres) certification, which is required for installs in hazardous-area zones — typically chemical, oil, gas, paint or grain-dust environments. If you operate in a Zone 1 or 2 area and an electrician quotes without mentioning CompEx, walk away.
For machinery installs we work to the Machinery Directive and BS EN 60204-1. We can liaise direct with your supplier on commissioning, lock-off arrangements and the technical file documentation if you need it for HSE.
Frequently asked
Do I have a 3-phase supply already?
Look at your incoming meter — three SP&N tails coming out of the cutout means 3-phase. If you have a single-phase 100A supply and need 3-phase you'll need a DNO upgrade — we handle that paperwork. Cost varies hugely by location: £0 (free upgrade if existing infrastructure permits) up to £15k+ for trenching down a long driveway.
What's the difference between 3-phase and single-phase?
Single-phase is the 230V supply most homes have. 3-phase delivers 415V between phases (230V phase-to-neutral) and is essential for any motor over about 7.5kW. Larger CNC, compressors, kilns, heat pumps and EV charging at 22kW all need 3-phase.
How long does an industrial install take?
A typical single-machine connection from an existing 3-phase board is 1 day on site plus 1 day for testing and certification. A full plant rewire or new-build distribution can run from a week to several months — we'll provide a Gantt-format programme.
Can you do work outside business hours to avoid downtime?
Yes — we run weekend and overnight shifts for industrial clients where production downtime is the dominant cost. We've done out-of-hours machinery work for clients like JM Precision Engineering, scheduled around their production.
Do you do hazardous-area work?
Yes. Our CompEx certification covers EX d, EX e, EX i and EX n equipment. We carry out installs in Zone 1 and Zone 2 environments and provide the EX Inspection Schedule the HSE will ask for.