Three Phase Boards & Accessories
Everything you need for three-phase installs in one place – distribution boards, surge kits, PME protection and more. All components are built to BS standards, clearly labelled, and available with next-day or Saturday delivery across the UK.
Read more about three-phase boards
A three-phase board (also called a 3 phase fuse board or 3 phase consumer unit) is designed to distribute incoming three-phase power across multiple circuits. These boards are commonly used in industrial switchgear installs, where balancing load and ensuring fault protection is critical.
Typical use cases include motor circuits, HVAC plant, lighting control, and renewable system integration with heat pump and EV-ready systems.
All units are manufactured in line with BS EN 61439 and suitable for installs that must meet 18th Edition Amendment 2. See our returns policy for hassle-free support.
3 Phase Surge Protection Device Unit with 8 Way Plastic IP65 enclosure (MCB variant)
£82.66
The WCED 3 Phase 8 Way IP65 Enclosure is supplied complete with a Type 2 Surge Protection Device (SPD) and your choice of either a 40A 4-pole Type A RCBO or 40A 4-pole MCB. Built into a durable IP65-rated enclosure, this unit gives electricians a...
WTPNSPKIT - TPN Single Phase Conversion Kit **NEW**
£4.97
The WTPNSPKIT Single Phase Conversion Kit allows you to adapt 125A TPN (Three-Phase Neutral) distribution boards for single-phase use quickly, safely, and cost-effectively. Instead of replacing a full 3-phase board, this kit provides the components required to repurpose it for single-phase loads while maintaining compliance...
3 Phase Distribution Board Spreader Box
£50.80
£55.00
The WTPNSB 3 Phase Spreader Box is designed to support safe cable management and heat dissipation in three-phase distribution board installs. Used to separate conductors and maintain airflow, this add-on accessory reduces thermal build-up on high-current terminations and makes wiring tidier and safer for future...
3 Phase Extension Board 14 Module
£70.00
The WTPNEB14 14-Module 3 Phase Extension Board is part of the Whitecliffe WTPN range, designed to expand existing 125A three-phase distribution systems. Built in a robust 1.2mm steel enclosure, it’s ideal for commercial, industrial, and larger domestic installs where additional outgoing ways are needed without...
125A 3 Phase Distribution Board – 4 Way
£157.55
The WTPN04-125 is the most compact model in our 125A Three Phase Distribution Board range. Supplied with a 125A 4-pole main switch and integrated Type 2 Surge Protection Device (SPD), it’s designed for reliable distribution across smaller commercial, light industrial, or large domestic three-phase installs...
What Is a Three Phase Board?
A three phase board, sometimes called a fuse board or consumer unit, splits incoming three-phase supply into manageable circuits. This ensures loads are balanced, fault protection is applied, and your installation meets UK wiring standards.
Where to Use Three Phase Fuse Boards
- Commercial and industrial premises with high load demand
- Motor circuits, HVAC, or plant equipment
- Lighting and power separation for safety
- Renewables and hybrid installs needing surge and PME protection
Standards & Compliance
All our three-phase boards and accessories are supplied to BS EN 61439 and IEC standards, with clear labelling for straightforward installation. Devices comply with 18th Edition Amendment 2, covering mandatory surge protection and PME safety requirements.
Explore Related Categories
Need to expand your installation? See our full range of surge protection devices, PME fault detection units, and enclosures.
Featured Three Phase Products
- 125A Three Phase Distribution Board – scalable protection for workshops, plantrooms, and industrial switchgear.
- 3-Phase SPD with MCB – pre-wired protection kit for transient overvoltage compliance.
- Three Phase PME Fault Detection Unit – essential for EV and renewable installs requiring PEN monitoring.
Trusted Supply
All boards and accessories are in stock and dispatched from our UK warehouse. Orders over £30 qualify for next-day delivery, with easy Saturday upgrade options. If you need to return an item, review our returns policy. Unsure which product suits your project? Contact our experts for tailored guidance.