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.
WKC 3 Pole 10kA MCB – 6A B Curve (WKC306B)
£12.35
The WKC306B 3 Pole 10kA MCB is a compact B Curve breaker rated at 6A, designed to protect three-phase circuits from overload and short-circuit faults. Built with a 10kA breaking capacity, it’s ideal for commercial and industrial distribution boards, EV chargers, and solar PV systems....
A Type Time Delay RCD – 100A 100mA, 4 Pole (WARTD4100-100)
£54.10
The WARTD4100-100 A-Type 100mA Time Delay RCD is a 4 Pole S-Type device rated at 100A for large-scale three-phase boards. Designed for upstream use, its time delay ensures proper discrimination, allowing downstream RCDs to trip first and keeping supply integrity across unaffected circuits. It’s a...
A Type Time Delay RCD – 80A 100mA, 4 Pole (WARTD480-100)
£53.95
The WARTD480-100 A-Type 100mA Time Delay RCD is a 4 Pole S-Type device rated at 80A, designed for selective upstream protection. Its built-in delay ensures only downstream RCDs disconnect under fault, maintaining continuity on unaffected circuits. Commonly used in three-phase distribution systems, EV charging installations,...
A Type Time Delay RCD – 63A 100mA, 4 Pole (WARTD463-100)
£43.95
The WARTD463-100 A-Type 100mA Time Delay RCD is a 4 Pole S-Type device rated at 63A. Its built-in time delay ensures upstream discrimination, allowing downstream RCDs to trip first and preventing unnecessary power loss. Ideal for three-phase distribution boards, EV charging hubs, and renewable installs...
High Immunity Type A 4 Pole RCBO – ADR440C
£37.14
The ADR440C High Immunity Type A 4 Pole RCBO is a 40A protective device designed for three-phase circuits where both AC and smooth DC leakage currents may occur. With 30mA residual current protection, 6mA DC detection, and a 10kA short-circuit rating, it delivers reliable protection...
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.