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Circuit Protection

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WCED WKB250C WCED 2 Pole 50A C Curve 10 kA MCB 1WCED WKB250C WCED 2 Pole 50A C Curve 10 kA MCB 2

WCED 2 Pole 50A C Curve 10 kA MCB

Delivery usually within 1-3 working days*
SKU: WKB250C
£6.99

5-£6.71£0.28£6.99
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Live Electrical CS3P25 Live Electrical 3 Pole 25A Changeover Switch 1Live Electrical CS3P25 Live Electrical 3 Pole 25A Changeover Switch 2

Live Electrical CS3P25 3 Pole 25A Changeover Switch

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SKU: CS3P25
£23.90
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Live Electrical RA220C-030 Live Electrical Double Pole Type A RCBO - Curve C - 20A 1Live Electrical RA220C-030 Live Electrical Double Pole Type A RCBO - Curve C - 20A 2

Live Electrical Double Pole Type A RCBO – Curve C – 20A

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SKU: RA220C-030
£16.06

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Live Electrical SA460 Live Electrical 4 Pole 30kA/60kA Type 2 Surge Protective Device

Live Electrical 4 Pole 30kA/60kA Type 2 Surge Protective Device

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SKU: SA460
£56.95
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Axiom SF63 Axiom SF63 63A TPN Switch Fuse with Fuses

Axiom SF63 63A TPN Switch Fuse with Fuses

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SKU: SF63
£122.50
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Axiom SF100 Axiom SF100 100A TPN Switch Fuse with Fuses

Axiom SF100 100A TPN Switch Fuse with Fuses

2 In stock
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SKU: SF100
£182.50
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Hager VML112SPDRK 12 Way Main Switch Consumer Unit, featuring a 100A main switch and Type 2 SPD, designed with round knockouts for easy cable entry. Unlike the VML112SPD, this version does not include a gland. Hager VML112SPDRK 12 Way SPD Consumer Unit - Open Front

Hager VML112SPDRK 12 Way Main Switch SPD Consumer Unit with Round Knockouts

1 In stock
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SKU: VML112SPDRK
£84.95
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FuseBox MT06C631 FuseBox MT06C631 63A C Curve MCB 1

FuseBox MT06C631 63A C Curve MCB

7 In stock
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SKU: MT06C631
£2.95
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FuseBox MT10B101 FuseBox MT10B101 10A Single Pole 10kA B Curve MCB

FuseBox MT10B101 10A Single Pole 10kA B Curve MCB

9 In stock
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SKU: MT10B101
£3.22
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FuseBox MT10B401 FuseBox MT10B401 40A Single Pole 10kA B Curve MCB

FuseBox MT10B401 40A Single Pole 10kA B Curve MCB

18 In stock
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SKU: MT10B401
£3.22
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FuseBox MT10C501 FuseBox MT10C501 50A Single Pole 10kA C Curve MCB

FuseBox MT10C501 50A Single Pole 10kA C Curve MCB

6 In stock
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SKU: MT10C501
£3.34
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FuseBox MT10C631 FuseBox MT10C631 63A Single Pole 10kA C Curve MCB

FuseBox MT10C631 63A Single Pole 10kA C Curve MCB

17 In stock
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SKU: MT10C631
£3.34
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FuseBox MT10D201 FuseBox MT10D201 20A Single Pole 10kA D Curve MCB

FuseBox MT10D201 20A Single Pole 10kA D Curve MCB

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SKU: MT10D201
£3.22
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FuseBox MT10C322 FuseBox MT10C322 32A Double Pole 10kA C Curve MCB

FuseBox MT10C322 32A Double Pole 10kA C Curve MCB

13 In stock
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SKU: MT10C322
£6.68
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FuseBox MT10C502 FuseBox MT10C502 50A Double Pole 10kA C Curve MCB

FuseBox MT10C502 50A Double Pole 10kA C Curve MCB

13 In stock
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SKU: MT10C502
£6.95
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Fusebox Consumer Unit MCB D Type

FuseBox MT10D102 10A Double Pole 10kA D Curve MCB

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SKU: MT10D102
£6.68
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FuseBox RTA104030B FuseBox RTA104030B 40A 10kA 30mA B Curve Type A RCBO

FuseBox RTA104030B 40A 10kA 30mA B Curve Type A RCBO

22 In stock
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SKU: RTA104030B
£17.44
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FuseBox RTA1003004 Fusebox RTA1003004 100A 4 Pole 300MA Type A RCD

Fusebox RTA1003004 100A 4 Pole 300mA Type A RCD

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SKU: RTA1003004
£28.90
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Live Electrical PEN2 Live Electrical 2 Way Plastic Enclosure 1

Live Electrical PEN2 2 Way Plastic Enclosure

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SKU: PEN2
£5.05
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Live Electrical LSMC22M-SP Live Electrical 19 Way SPD Metal Consumer Unit 1Live Electrical LSMC22M-SP Live Electrical 19 Way SPD Metal Consumer Unit 2

Live Electrical 19 Way SPD Metal Consumer Unit

2 In stock
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SKU: LSMC22M-SP
£55.87

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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.

 

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