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Circuit Protection

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SPD Surge Protection Devices (109)

FuseBox MT06B631 FuseBox MT06B631 63A MCB Curve B 1

FuseBox MT06B631 63A MCB Curve B

13 In stock
More available within 1-3 working days*
SKU: MT06B631
£2.90
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Live Electrical EN6040/200 Live Electrical Metal Enclosure IP65 H:600 x W:400 x D:200mm 1Live Electrical EN6040/200 Live Electrical Metal Enclosure IP65 H:600 x W:400 x D:200mm 2

Live Electrical EN6040/200 IP65 Metal Enclosure H:600 x W:400 x D:200mm

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SKU: EN6040/200
£75.90
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WCED WRB106C-030 WCED Type A High Immunity Curve C 6A 30mA RCBO 1WCED WRB106C-030 WCED Type A High Immunity Curve C 6A 30mA RCBO 2

WCED Type A High Immunity Curve C 6A 30mA RCBO

16 In stock
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SKU: WRB106C-030
£9.99

5-£9.49£0.50£9.99
10-£8.99£1.00£9.99
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WCED WMC140C WCED Miniature Circuit Breaker 6kA Curve C - 40A 1WCED WMC140C WCED Miniature Circuit Breaker 6kA Curve C - 40A 2

WCED Miniature Circuit Breaker 6kA Curve C – 40A

7 In stock
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SKU: WMC140C
£1.53

5-£1.47£0.06£1.53
10-£1.43£0.10£1.53
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Live Electrical SP1401P+N/1 Type 2 SPD Surge Protection Device

Live Electrical SP1401P+N/1 Type 2 SPD Surge Protection Device

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SKU: SP1401P+N/1
£13.67
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FuseBox F1M2SPD Fusebox F1M2SPD Stand Alone Surge Protection Device 1

Fusebox F1M2SPD Stand Alone Surge Protection Device

1 In stock
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SKU: F1M2SPD
£54.90
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WCED WME16/SP WCED 13 Way SPD Metal Consumer Unit

WCED 13 Way SPD Metal Consumer Unit

3 In stock
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SKU: WME16/SP
£53.00

2-£47.70£5.30£53.00
3-£46.64£6.36£53.00
4-£45.58£7.42£53.00
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WCED WAR240-030 WCED 2 Pole 40A 30mA Type A High Immunity RCD

WCED WAR240-030 2 Pole 40A 30mA Type A High Immunity RCD

4 In stock
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SKU: WAR240-030
£16.17

2-£15.36£0.81£16.17
3-£14.96£1.21£16.17
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FuseBox F1004E Fusebox F1004E 4 Module Metal Enclosure

Fusebox F1004E 4 Module Metal Enclosure

1 In stock
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SKU: F1004E
£17.11
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WCED Consumer Units

WCED 2 Pole 230V 100A NO Normally Open AC Modular Contactor

4 In stock
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SKU: WAC2P100
£25.50

3-£24.86£0.64£25.50
5-£24.23£1.28£25.50
10-£23.59£1.91£25.50
20-£22.95£2.55£25.50
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Live Electrical CS3P63 3 Pole 63A Changeover Switch

Live Electrical CS3P63 3 Pole 63A Changeover Switch

4 In stock
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SKU: CS3P63
£36.90
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WCED WAC4P63/24 WCED 4 Pole 63A 24V Normally Open AC Contactor 1

WCED 4 Pole 63A 24V NO Normally Open AC Modular Contactor

10 In stock
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SKU: WAC4P63/24
£13.50

3-£13.16£0.34£13.50
5-£12.83£0.68£13.50
10-£12.49£1.01£13.50
20-£12.15£1.35£13.50
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Live Electrical LEV440SP-P IP65 EV Consumer Unit with 40A C Curve RCBO, SPD, and Busbar Live Electrical LEV440SP-P IP65 EV Consumer Unit C40 RCBO + Type 2 SPD + Busbar

Live Electrical LEV440SP-P IP65 EV Consumer Unit C40 RCBO + Type 2 SPD + Busbar

10 In stock
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SKU: LEV440SP-P
£30.99

3-£29.44£1.55£30.99
5-£28.67£2.32£30.99
10-£27.89£3.10£30.99
20-£26.34£4.65£30.99
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Live Electrical CB216C 2 Pole MCB 16A C Curve

Live Electrical CB216C 2 Pole 10kA MCB 16A C Curve

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SKU: CB216C
£5.89
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WCED WKC132B 10kA 1 Pole MCB Curve B 32A

WCED WKC132B 10kA 1 Pole MCB Curve B 32A

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SKU: WKC132B
£2.65
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Hager ADA106U Type A RCBO

Hager ADA182U RCBO 10kA C-32A 30mA Type A

4 In stock
This item cannot be back-ordered
SKU: ADA182U
£30.99
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Live Electrical CB350B Live Electrical CB350B 3 Pole 50A B Curve 10kA MCB 1Live Electrical CB350B Live Electrical CB350B 3 Pole 50A B Curve 10kA MCB 2

Live Electrical CB350B 3 Pole 50A B Curve 10kA MCB

14 In stock
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SKU: CB350B
£10.99
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Live Electrical CB363B Live Electrical CB363B 3 Pole 63A B Curve 10kA MCB 1Live Electrical CB363B Live Electrical CB363B 3 Pole 63A B Curve 10kA MCB 2

Live Electrical CB363B 3 Pole 63A B Curve 10kA MCB

4 In stock
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SKU: CB363B
£10.99
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Hager NBN132A Hager NBN132A Single Pole Type B MCB 32A 10kA

Hager NBN132A Single Pole Type B MCB 32A 10kA

10 In stock
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SKU: NBN132A
£8.94
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FuseBox AFDD061630B FuseBox AFDD061630B 16A AFDD RCBO 30mA 1FuseBox AFDD061630B FuseBox AFDD061630B 16A AFDD RCBO 30mA 3

FuseBox AFDD061630B 16A AFDD RCBO 30mA

1 In stock
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SKU: AFDD061630B
£84.65
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Selection of Consumer Units, TPN Distribution Boards, Circuit Protection, Rotary Isolators, Meter Tails, Fused Switches and Accessories.

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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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