Three Phase Boards & Accessories for Commercial & Industrial Installations
Three phase boards and accessories for commercial, industrial, and higher-load electrical installations. This collection includes 3 phase distribution boards, three phase surge protection, PME fault detection devices, and related accessories used to build, protect, and expand three-phase systems properly.
Whether you're specifying a 3 phase fuse board, adding surge protection, or sourcing supporting components for a larger install, this range is built around the products electricians and contractors regularly need for dependable three-phase distribution.
Quick answer: A three phase board distributes incoming power across multiple circuits in commercial and industrial installations. This collection covers the core boards plus the surge, PME, and accessory products often specified alongside them.
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A three phase board, sometimes searched for as a 3 phase fuse board or three phase distribution board, is used where a single-phase consumer unit is not suitable for the size, load profile, or equipment involved. These boards are common in workshops, commercial units, plant areas, agricultural buildings, and industrial settings where balanced load distribution and robust circuit protection matter.
- Three phase distribution boards – for structured power distribution across multiple outgoing circuits
- SPD options – for installations where surge protection is being specified
- PME fault detection – for applications where open PEN protection is relevant
- Board accessories and supporting products – for expansion, adaptation, and install completion
Looking for a more specific board type? Browse our 125A TPN boards with SPD, wider three phase range, or three phase boards & accessories collection. For delivery and returns, see our delivery information and returns policy.
3 Phase Surge Protection Device Unit with 8 Way Metal IP40 enclosure 40A RCBO
£84.95
Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping. The WRCUSP440C is a ready-to-fit 3-Phase Surge Protection Device (SPD) Unit supplied in an 8-way IP40 steel enclosure. It includes a 4-pole Type 2 SPD (20kA/40kA) paired with...
3 Phase PME Fault Detection Unit 40R (WARB5100C/PME40R)
£126.65
Pre-wired in the UK and built to order – allow up to 3 working days for dispatch. The WARB5100C/PME40R is a 3 Phase PME Fault Detection Unit with integrated 40A Type A RCBO. It combines a 100A MCB main switch, PME relay, and RCBO to...
4 Pole B-Type RCD – WEV4100B-030 (100A, 30mA)
£158.65
The WEV4100B-030 is a 4 Pole Type B RCD (100A, 30mA) designed for higher-load applications where smooth DC and high-frequency leakage currents may be present. Unlike Type A RCDs, it detects AC, pulsed DC, and smooth DC residual currents up to 1000 Hz, ensuring full...
125A 3 Phase Distribution Board – 12 Way (WTPN12-125SP)
£207.25
The WTPN12-125SP is a 12-way 125A three-phase distribution board designed for commercial and industrial installations that require a higher circuit count with room for structured distribution. Supplied as standard with a 125A 4-pole main switch, an integrated Type 2 Surge Protection Device (SPD), and a...
WKC 3 Pole 10kA MCB – 20A C Curve (WKC320C)
£12.35
The WKC320C 3 Pole 10kA MCB is a 20A C Curve breaker built to safeguard three-phase circuits against overload and short-circuit faults. With a 10kA breaking capacity and full compliance with BS 7671 (18th Edition), it’s ideal for circuits with moderate inrush currents such as...
Three Phase Boards for Larger Power Distribution Setups
A three phase board is used to distribute power safely across multiple circuits where the installation has a three-phase supply. Compared with a standard domestic consumer unit, these boards are designed for larger loads, more demanding equipment, and installations where circuit separation, load balancing, and accessory compatibility are more important.
What Is a Three Phase Board?
A three phase board, also called a 3 phase distribution board or sometimes a 3 phase fuse board, takes an incoming three-phase supply and divides it into protected outgoing ways. These boards are commonly used in commercial premises, workshops, industrial sites, and any environment where a single-phase setup would be too limited.
What You’ll Find in This Range
- Three phase distribution boards – for core power distribution across multiple circuits
- Three phase surge protection – to help protect installations against transient overvoltage
- PME fault detection devices – for applications where open PEN monitoring is required
- Accessories and expansion products – to support board build-out, upgrades, and adaptation
Typical Applications
- Commercial premises – where lighting, power, and equipment loads need to be split properly
- Industrial environments – for machinery, plant, and heavier-duty electrical systems
- Workshops and units – where three-phase power is needed for tools, motors, or mixed distribution
- Renewable and specialist installs – where surge protection or PME-related protection may also be specified
Featured Three Phase Products
- 125A Three Phase Distribution Board – suitable for commercial and industrial power distribution.
- 3 Phase SPD with MCB – surge protection option for three-phase installations.
- Three Phase PME Fault Detection Unit – open PEN protection for relevant three-phase applications.
Related Three Phase Categories
These products are commonly specified alongside our 125A TPN boards with SPD, 3 phase surge protection devices, PME fault detection, and broader three phase boards and protection collections.
FAQs on Three Phase Boards
What is a three phase board used for?
A three phase board is used to distribute power across multiple circuits in installations with a three-phase supply, typically in commercial, industrial, or larger specialist environments.
Is a three phase board the same as a 3 phase fuse board?
In many searches, yes. People often use terms like three phase board, 3 phase fuse board, and three phase distribution board to describe closely related products or board types.
Can I add surge protection to a three phase board?
Yes, many three-phase installs use SPD protection either built into the board or specified alongside it, depending on the product and installation design.
Are these the same as domestic consumer units?
Not usually. Three phase boards are generally used on larger or more demanding systems than a typical single-phase domestic consumer unit.
Why Buy Three Phase Boards & Accessories from Power & Data UK?
Power & Data UK supplies trade-focused electrical equipment with dependable UK stock, practical product selection, and fast dispatch. Orders over £30 qualify for free UK mainland next-day delivery, and products are backed by a 2-year manufacturer warranty. For unwanted items, see our returns policy.