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3 Phase Consumer Units & Distribution Boards

3 phase consumer units and three phase distribution boards for commercial, industrial and larger domestic installations. Browse 3 phase boards, surge protection units, PME fault detection devices, main switches, MCBs, RCDs and supporting circuit protection for higher-load electrical systems.

This range is suited to installers working on three-phase supplies, EV charging infrastructure, solar PV systems, workshops, commercial buildings, plant rooms and distribution upgrades.

Quick answer: A 3 phase consumer unit or distribution board is used to split a three-phase supply into protected outgoing circuits for commercial, industrial or higher-load installations.

Read more about 3 phase boards

Common three-phase products include:

  • 3 phase consumer units and distribution boards: for higher-load circuit distribution
  • 3 phase surge protection: for transient overvoltage protection
  • 4 pole main switches and isolators: for three-phase isolation
  • 3 pole and 4 pole MCBs: for circuit protection
  • 3 phase PME fault detection: for EV and renewable installations where PEN monitoring is required

Choose products based on supply type, circuit count, current rating, protection requirements and installation environment.

Showing 1 to 12 of 29 items
3 Phase Surge Protection in Metal Enclosure
Out of stock SKU: WME3P40SP

3 Phase Surge Protection in Metal Enclosure

£39.65 ex VAT £47.58 inc VAT

The WCED WME3P40SP is a pre-assembled 3-phase surge protection unit housed in a durable steel enclosure – built to safeguard commercial, industrial, and EV...

View product Unavailable
Fused Main Switch - WFIS100
Out of stock SKU: WFIS100

Fused Main Switch - WFIS100

£17.95 ex VAT £21.54 inc VAT

The WFIS100 is a compact, insulated fused main switch rated at 100A AC21 - designed for safe isolation and protection of incoming supplies. Supplied...

View product Unavailable

What Is a 3 Phase Consumer Unit?

A 3 phase consumer unit, three phase board or 3 phase distribution board distributes an incoming three-phase supply across protected outgoing circuits. These boards are typically used where electrical demand is higher than a standard single-phase installation can support.

Where Three Phase Consumer Units Are Used

  • Commercial premises with high load demand
  • Industrial environments running motors, plant, or HVAC
  • Lighting and socket distribution across large buildings
  • Renewable or hybrid installations requiring balanced three-phase supply

Compliance & Standards

Three-phase installations should be designed and installed in accordance with BS 7671 and the relevant product standards for the selected board and protective devices. The right specification depends on supply type, load demand, circuit protection, surge protection and isolation requirements.

Explore Related Categories

Looking for accessories to complete your install? Explore our full range of Surge Protection Devices, PME Fault Detection Units, and Enclosures.

Featured Three Phase Products

FAQs on 3 Phase Consumer Units

What is a 3 phase consumer unit used for?
A 3 phase consumer unit is used to distribute a three-phase electrical supply into multiple protected circuits, commonly in commercial buildings, workshops, plant rooms and higher-load installations.

Is a 3 phase consumer unit the same as a distribution board?
The terms are often used interchangeably. In practice, both refer to a board used to distribute and protect circuits from a three-phase supply.

Do 3 phase boards need surge protection?
Surge protection should be considered as part of the installation design. Many commercial and renewable installations use three-phase SPDs to help protect connected equipment.

Can 3 phase boards be used for EV or solar installs?
Yes. Three-phase boards are often used for commercial EV charging, solar PV, heat pumps and other higher-load renewable systems where the installation design requires them.

Trusted Supply

All products are UK-stocked and dispatched from our warehouse. Orders over £30 qualify for next-day delivery, with Saturday upgrades available. Need to return an item? See our returns policy. For tailored advice, contact our technical team.