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Circuit Protection

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Hager NBN332A 3 Pole MCB Type B 32A 10kA

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£37.71

Hager NBN363A MCB 3 Pole Type B 63A 10kA

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SKU: NBN363A
£43.93

Hager NCN310A 3 Pole MCB Type C 10A 10kA

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SKU: NCN310A
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Hager NCN350A 3 Pole MCB Type C 50A 10kA

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£41.00

Hager NCN363A 3 Pole MCB Type C 63A 10kA

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Hager NCN150A Single Pole Type C MCB 50A 10kA

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£9.98

Hager NBN150A Single Pole Type B MCB 50A 10kA

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Hager NBN120A Single Pole Type B MCB 20A 10kA

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SKU: NBN120A
£9.18

FuseBox AFDD060630B 6A 30mA AFDD

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SKU: AFDD060630B
£70.99

FuseBox AFDD064030B 40amp 30mA AFDD

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SKU: AFDD064030B
£70.99

Live Electrical EN5040/250 IP65 Metal Enclosure H:500 x W:400 x D:250mm

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SKU: EN5040/250
£71.39

Live Electrical EN6060/250 IP65 Metal Enclosure H:600 x W:600 x D:250mm

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SKU: EN6060/250
£108.90

Live Electrical EN8060/300 IP65 Metal Enclosure H:800 x W:600 x D:300mm

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SKU: EN8060/300
£229.61

IP65 EV Consumer Unit with B Type 40A RCD and C40 MCB

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SKU: WPEVKIT63-EC
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WCED | WME16/MS100 | 100A Main Switch Consumer Unit | 14 Way

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SKU: WME16/MS100
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WCED 16 Way Metal Enclosure

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WCED 18 Way Metal Enclosure

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SKU: WME18
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Live Electrical Double Pole Type A RCBO – Curve C – 10A

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SKU: RA210C-030
£13.99

Axiom RS254SE 4 Pole 25A Rotary Isolator – 415V

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SKU: RS254SE
£21.41

Hager ARR920U AFD with 30mA RCBO 20A Curve B Type A

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SKU: ARR920U
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Showing 1141–1160 of 2370 results

Selection of Consumer Units, TPN Distribution Boards, Circuit Protection, Rotary Isolators, Meter Tails, Fused Switches and Accessories.

18th Edition Consumer Units with built in SPD Surge Protection Device, stand alone SPD units, PEN loss, PME fault detection consumer units, Consumer units relocation boxes/kits, Three phase distribution boards with built in SPD and main switch.

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Circuit protection in the UK is governed by the wiring regulations outlined in the British Standard BS 7671. This standard, also known as the IET Wiring Regulations, sets out the requirements for the design, installation, and maintenance of electrical installations in the UK. Circuit protection is a crucial aspect of electrical installations to ensure the safety of people and property.

Here are some key aspects of circuit protection according to BS 7671 and the devices commonly used in the UK market:

  1. Circuit Breakers: Circuit breakers are essential devices for protecting electrical circuits. BS 7671 specifies requirements for the selection and installation of circuit breakers. They come in various types, including:
    • Miniature Circuit Breakers (MCBs): MCBs are commonly used to protect individual circuits. They trip when there’s an overload or a short circuit.
    • Residual Current Devices (RCDs): RCDs are designed to protect against electric shock. They disconnect the circuit if they detect an imbalance in current, indicating a fault.
    • Combination RCD/MCB Devices: These devices combine the functions of both MCBs and RCDs in a single unit. They are often used for socket outlets.
  2. Fuses: While less common in modern installations, fuses may still be used for circuit protection. They work by melting when there’s an excess current, breaking the circuit.
  3. Overcurrent Protection: BS 7671 requires that circuits are protected against overcurrents. This is typically achieved through the use of circuit breakers, fuses, or other protective devices.
  4. Earthing and Bonding: Proper earthing and bonding are essential for safety. This ensures that in the event of a fault, the fault current is safely directed away from people and property.
  5. Surge Protection: Surge protection devices may be required to protect against voltage surges or lightning strikes, especially for sensitive electronic equipment.
  6. Arc Fault Detection: In certain installations, arc fault detection devices may be used to detect and disconnect circuits in the presence of dangerous arc faults.
  7. Circuit Isolation: BS 7671 also specifies requirements for circuit isolation devices such as switches and isolators.
  8. Cable Sizing: The standard provides guidelines for selecting the correct cable size to ensure that the cables can safely carry the intended load without overheating.
  9. Circuit Labels and Documentation: Proper labeling and documentation of circuits are important for maintenance and safety. BS 7671 outlines requirements for labeling and record-keeping.

It’s important to note that regulations and standards may be updated over time, so it’s essential to consult the latest version of BS 7671 and any local regulations or codes that may apply to your specific location or type of installation. Additionally, electrical work should be carried out by qualified and competent electricians to ensure compliance with safety standards.