2 Pole MCBs for Safe Line & Neutral Disconnection
2 pole MCBs provide overcurrent and short-circuit protection while disconnecting both the live and neutral conductors simultaneously. They are used where full circuit isolation is required under fault conditions, or where the supply characteristics demand neutral disconnection for safe operation.
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These breakers are essential for circuits fed from certain earthing arrangements, sub-mains to outbuildings, and equipment where neutral isolation is required for safety or compliance. With simultaneous breaking of both poles, they prevent back-feed and ensure full isolation for testing, maintenance and protection scenarios.
- Simultaneous line and neutral disconnection for safer isolation
- Ideal for sub-mains feeding garages, garden rooms and workshops
- Suitable for TT, TN-S and mixed-earthing systems where neutral isolation is beneficial
- B and C curve options to match load characteristics
- Robust DIN-rail construction for distribution boards and panel builds
2 Pole MCBs are commonly used by electricians who prefer clean, full isolation on dedicated circuits or where system design requires disconnecting both conductors during a fault.
16A 2 Pole 10kA MCB – B Curve (WKC216B)
£7.49
The WKC216B is a 16A 2 Pole 10kA Miniature Circuit Breaker (MCB) designed for dependable short-circuit and overload protection in small power and lighting applications. With a B-curve tripping characteristic and double-pole isolation, it’s ideal for heating circuits, immersion heaters, control gear, and general sockets...
50A 2 Pole 10kA MCB – C Curve (WKC250C)
£7.49
The WKC250C is a 50 A 2 Pole 10 kA Miniature Circuit Breaker (MCB) designed for high-demand single-phase or split-load circuits with moderate inrush current. With a C-curve tripping profile, it provides reliable protection for plant equipment, heating systems, and heavy lighting circuits where initial...
40A 2 Pole 10kA MCB – C Curve (WKC240C)
£7.49
The WKC240C is a 40 A 2 Pole 10 kA Miniature Circuit Breaker (MCB) providing robust short-circuit and overload protection for moderate inrush applications. The C-curve tripping characteristic is ideal for HVAC systems, small machinery, and feeder circuits where start-up currents exceed standard B-curve tolerances....
40A 2 Pole 10kA MCB – B Curve (WKC240B)
£7.49
The WKC240B is a 40A 2 Pole 10kA Miniature Circuit Breaker (MCB) designed to protect higher-load radial and feeder circuits against short-circuit and overload faults. The B-curve tripping profile ensures rapid disconnection for resistive and low-inrush circuits such as outbuilding sub-mains, immersion heaters, and EV...
32A 2 Pole 10kA MCB – C Curve (WKC232C)
£7.49
The WKC232C is a 32 A 2 Pole 10 kA Miniature Circuit Breaker (MCB) designed for reliable short-circuit and overload protection on circuits with moderate inrush current. The C-curve tripping profile provides tolerance for start-up surges — perfect for motors, ring mains, and sub-distribution feeds....
What Is a 2 Pole MCB?
A 2 pole MCB trips both the live and neutral conductors at the same time. This ensures complete isolation of the circuit, reducing the risk of back-feed, stray voltage or neutral-related hazards. It provides the same overcurrent and short-circuit protection as a single-pole device, but with enhanced safety through dual-pole breaking.
Where 2 Pole MCBs Are Used
- Outbuildings and detached structures such as garages and garden offices
- TT installations where neutral isolation improves safety
- Distribution circuits supplying small consumer units or DBs
- Machinery or equipment requiring full isolation during faults
- Workshop and commercial environments with mixed earthing or sensitive equipment
B Curve vs C Curve 2 Pole MCBs
B Curve: Trips at 3–5 × rated current. Suited to standard loads and general circuits.
C Curve: Trips at 5–10 × rated current. Ideal for circuits with motors, compressors or higher inrush.
Why Use a 2 Pole MCB?
Unlike single-pole breakers, a 2 pole MCB isolates both conductors, making the circuit completely safe to work on and preventing unwanted neutral-to-earth paths. This is especially important where:
- Neutral integrity is uncertain (common in older or mixed systems)
- Back-feed risks exist
- Full isolation is needed for inspection or maintenance
- Sub-mains run outdoors or through different buildings
Compliance & Standards
All 2 Pole MCBs in this category comply with BS EN 60898 and support full compliance with the 18th Edition Wiring Regulations when selected with the correct curve, rating and breaking capacity.
Installer Benefits
2 Pole MCBs provide added safety, predictable performance and clean isolation in environments where single-pole devices are not sufficient. They offer robust protection for sub-mains, outdoor circuits and sensitive equipment while simplifying testing and maintenance.