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Circuit Protection

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SPD Surge Protection Devices (110)

WCED Type A Bi-Directional Curve B 10A 30mA RCBO - WRB110B-030

WCED Type A Bi-Directional Curve B 10A 30mA RCBO – WRB110B-030

15 In stock
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SKU: WRB110B-030
£9.99
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PME / PEN Fault Detection IP65 Unit 6 Mod c/w C32 RCBO /4P63A contactor & PME Relays WCED WPEPME08/C32 PME Fault Detection IP65 Unit 6 Mod c/w C32 RCBO /4P63A contactor & PME Relays 2

PME / PEN Fault Detection IP65 Unit 6 Mod c/w C32 RCBO /4P63A contactor & PME Relays

Delivery usually within 1-3 working days*
SKU: WPEPME08/C32
£94.50

2-£92.61£1.89£94.50
3-£91.67£2.83£94.50
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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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 Hager VAT21 Terminal Bar 21 Way with Two Support Clips

 Hager VAT21 Terminal Bar 21 Way with Two Support Clips

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SKU: VAT21
£9.05
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FuseBox F2015M FuseBox F2015M 15 Way RCBO Consumer Unit 1

FuseBox F2015M 15 Way RCBO Consumer Unit

9 In stock
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SKU: F2015M
£40.90
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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

9 In stock
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SKU: WRB106C-030
£9.99
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WCED WSPD340 20kA/40kA 3 Pole Type 2 Surge Protection Device

WCED Whitecliffe WSPD340 20kA/40kA 3 Pole Type 2 Surge Protection Device

1 In stock
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SKU: WSPD340
£19.20

3-£18.24£0.96£19.20
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WCED WMEV220B WCED A-Type Electric Vehicle 2 Module Enclosure - 20A RCBO B Curve 1WCED WMEV220B WCED A-Type Electric Vehicle 2 Module Enclosure - 20A RCBO B Curve 2

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

6 In stock
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SKU: WMEV220B
£25.99

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3-£24.04£1.95£25.99
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WCED WMEV232B WCED A-Type Electric Vehicle 2 Module Enclosure - 32A RCBO B Curve 1WCED WMEV232B WCED A-Type Electric Vehicle 2 Module Enclosure - 32A RCBO B Curve 2

WCED A-Type Electric Vehicle 2 Module Enclosure – 32A RCBO B Curve

Delivery usually within 1-3 working days*
SKU: WMEV232B
£25.99

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FuseBox RTA100630C FuseBox RTA100630C 6A 30mA 10kA C Curve Type A RCBO

FuseBox RTA100630C 6A 30mA 10kA C Curve Type A RCBO

34 In stock
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SKU: RTA100630C
£17.44
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Live Electrical WI3P20A - Waterproof Isolator Switch 3 Pole 20 A

Live Electrical WI3P20A – Waterproof Isolator Switch 3 Pole 20 A

6 In stock
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SKU: WI3P20A
£7.50
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WCED WMC150B WCED Miniature Circuit Breaker 6kA Curve B - 50A 1WCED WMC150B WCED Miniature Circuit Breaker 6kA Curve B - 50A 2

WCED Miniature Circuit Breaker 6kA Curve B – 50A

8 In stock
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SKU: WMC150B
£1.53
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WCED WAC2P32 WCED 2 Pole 32A 2NO AC Contactor

WCED 2 Pole 230V 32A NO Normally Open AC Modular Contactor

3 In stock
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SKU: WAC2P32
£5.99

3-£5.84£0.15£5.99
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FuseBox MT10B321 FuseBox MT10B321 32A Single Pole 10kA B Curve MCB

FuseBox MT10B321 32A Single Pole 10kA B Curve MCB

25 In stock
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SKU: MT10B321
£3.22
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Live Electrical LSMC14M-SP Live Electrical 11 Way SPD Metal Consumer Unit 1Live Electrical LSMC14M-SP Live Electrical 11 Way SPD Metal Consumer Unit 2

Live Electrical 11 Way SPD Metal Consumer Unit

2 In stock
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SKU: LSMC14M-SP
£46.12
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Live Electrical CB106D Live Electrical CB106D 6A Curve D 10kA MCB 1Live Electrical CB106D Live Electrical CB106D 6A Curve D 10kA MCB 2

Live Electrical CB106D 6A Curve D 10kA MCB

18 In stock
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SKU: CB106D
£2.95
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Live Electrical MAC2P63 Live Electrical MAC2P63 63A Modular AC Contractor 2 Pole NO 1Live Electrical MAC2P63 Live Electrical MAC2P63 63A Modular AC Contractor 2 Pole NO 2

Live Electrical MAC2P63 63A Modular AC Contractor 2 Pole NO

9 In stock
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SKU: MAC2P63
£9.79
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FuseBox MT06C161 FuseBox MT06C161 16A MCB Curve C 1

FuseBox MT06C161 16A MCB Curve C

29 In stock
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SKU: MT06C161
£1.95
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FuseBox F2029MX Fusebox F2029MX 29 Way RCBO Consumer Unit With SPD 1

Fusebox F2029MX 29 Way RCBO Consumer Unit With SPD

1 In stock
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SKU: F2029MX
£159.00
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FuseBox F2014DT Fusebox F2014DT 14 Way Dual Tariff Consumer Unit 1

Fusebox F2014DT 14 Way Dual Tariff Consumer Unit

3 In stock
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SKU: F2014DT
£45.02
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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.

 

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