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Circuit Protection

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WCED WME18 WCED 18 Way Metal Enclosure 1WCED WME18 WCED 18 Way Metal Enclosure 2

WCED 18 Way Metal Enclosure

2 In stock
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SKU: WME18
£36.71

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WCED WMC150C WCED Miniature Circuit Breaker 6kA Curve C - 50A 1WCED WMC150C WCED Miniature Circuit Breaker 6kA Curve C - 50A 2

WCED Miniature Circuit Breaker 6kA Curve C – 50A

9 In stock
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SKU: WMC150C
£1.53
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FuseBox F2045M FuseBox F2045M 45 Way RCBO Consumer Unit

FuseBox F2045M 45 Way RCBO Consumer Unit

Delivery usually within 1-3 working days*
SKU: F2045M
£192.90
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Hager ADA145U Type A RCBO

Hager ADA190U RCBO 10kA C-40A 30mA Type A

2 In stock
This item cannot be back-ordered
SKU: ADA190U
£30.99
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WCED WME18100TR WCED Metal Dual 100A Type A RCD Consumer Unit – 12 Usable Way

WCED Metal Dual 100A Type A RCD Consumer Unit – 12 Usable Way

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SKU: WME18100TR
£79.25
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WCED WME22100TR/SP WCED Metal Dual 100A Type A RCD SPD Consumer Unit – 14 Usable Way

WCED Metal Dual 100A Type A RCD SPD Consumer Unit – 14 Usable Way

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SKU: WME22100TR/SP
£100.25
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WCED WKB5100C WCED 100A C Curve 5 Pole MCB 10kA 1WCED WKB5100C WCED 100A C Curve 5 Pole MCB 10kA 2

WCED 100A C Curve 5 Pole MCB 10kA

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SKU: WKB5100C
£20.10

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WCED WKB206B WCED 2 Pole 6A B Curve 10 kA MCB 1WCED WKB206B WCED 2 Pole 6A B Curve 10 kA MCB 2

WCED 2 Pole 6A B Curve 10 kA MCB

5 In stock
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SKU: WKB206B
£6.99

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WCED WKB206C WCED 2 Pole 6A C Curve 10 kA MCB 1WCED WKB206C WCED 2 Pole 6A C Curve 10 kA MCB 2

WCED 2 Pole 6A C Curve 10 kA MCB

9 In stock
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SKU: WKB206C
£6.99

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WCED WMEV225B WCED A-Type Electric Vehicle 2 Module Enclosure - 25A RCBO B Curve 1WCED WMEV225B WCED A-Type Electric Vehicle 2 Module Enclosure - 25A RCBO B Curve 2

WCED A-Type Electric Vehicle 2 Module Enclosure – 25A RCBO B Curve

2 In stock
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SKU: WMEV225B
£25.99

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WCED WMEV220C WCED A-Type Electric Vehicle 2 Module Enclosure - 20A RCBO C Curve 1WCED WMEV220C WCED A-Type Electric Vehicle 2 Module Enclosure - 20A RCBO C Curve 2

WCED A-Type Electric Vehicle 2 Module Enclosure – 20A RCBO C Curve

4 In stock
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SKU: WMEV220C
£25.99

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WCED WMEV225C WCED A-Type Electric Vehicle 2 Module Enclosure - 25A RCBO C Curve 1WCED WMEV225C WCED A-Type Electric Vehicle 2 Module Enclosure - 25A RCBO C Curve 2

WCED A-Type Electric Vehicle 2 Module Enclosure – 25A RCBO C Curve

4 In stock
More available within 1-3 working days*
SKU: WMEV225C
£25.99

2-£24.69£1.30£25.99
3-£24.04£1.95£25.99
5-£23.39£2.60£25.99
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WCED WKB350C WCED 3 Pole 50A C Curve 10 kA MCB 1WCED WKB350C WCED 3 Pole 50A C Curve 10 kA MCB 2

WCED 3 Pole 50A C Curve 10 kA MCB

4 In stock
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SKU: WKB350C
£9.99

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10-£9.34£0.65£9.99
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WCED WKB363C WCED 3 Pole 63A C Curve 10 kA MCB 1WCED WKB363C WCED 3 Pole 63A C Curve 10 kA MCB 2

WCED 3 Pole 63A C Curve 10 kA MCB

5 In stock
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SKU: WKB363C
£9.99

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Axiom SF20 Axiom SF20 20A TPN Switch Fuse with Fuses

Axiom SF20 20A TPN Switch Fuse with Fuses

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SKU: SF20
£64.50
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Axiom SF32 Axiom SF32 32A TPN Switch Fuse with Fuses

Axiom SF32 32A TPN Switch Fuse with Fuses

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SKU: SF32
£85.95
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WCED ATDR480-100 Time Delay Type A 4 Pole 80A 100mA RCD

WCED ATDR480-100 Time Delay Type A 4 Pole 80A 100mA RCD

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SKU: ATDR480-100
£34.88

2-£33.14£1.74£34.88
3-£32.26£2.62£34.88
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Axiom SD100 Axiom 100A Isolator TPN Grey Steel Enclosure

Axiom 100A Isolator TPN Grey Steel Enclosure

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SKU: SD100
£165.50
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Axiom RS254SE Axiom Rotary Isolator - 415V 25Amp 4P

Axiom RS254SE 4 Pole 25A Rotary Isolator – 415V

1 In stock
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SKU: RS254SE
£20.95
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Axiom THR133.6 Axiom Thermal Overload Relay 2.8 - 4.2A

Profix THR133.6 Thermal Overload Relay 2.8 – 4.2A

1 In stock
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SKU: THR133.6
£12.50
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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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