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Circuit Protection

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SPD Surge Protection Devices (109)

Live Electrical CH3100C Live Electrical CH3100C 3 Pole 100 Amp C curve 10kA MCB

Live Electrical CH3100C 3 Pole 100A C Curve 6kA MCB

Delivery usually within 1-3 working days*
SKU: CH3100C
£11.99
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WCED WAC2P20 WCED 2 Pole 20A 2NO AC Contactor 1

WCED 2 Pole 230V 20A NO Normally Open AC Modular Contactor

4 In stock
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SKU: WAC2P20
£5.99

3-£5.84£0.15£5.99
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20-£5.39£0.60£5.99
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Live Electrical CS3P20 Live Electrical 3 Pole 20A Changeover Switch 1Live Electrical CS3P20 Live Electrical 3 Pole 20A Changeover Switch 2

Live Electrical CS3P20 3 Pole 20A Changeover Switch

6 In stock
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SKU: CS3P20
£17.90
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WCED WME8/SP/4RCBO WCED Consumer Unit Kit with SPD and 4 RCBOs 1

WCED Consumer Unit Kit with SPD and 4 RCBOs

Delivery usually within 1-3 working days*
SKU: WME8/SP/4RCBO
£73.36
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Live Electrical MS4100 4 Pole 100A Main Switch

Live Electrical MS4100 4 Pole 100A Main Switch

3 In stock
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SKU: MS4100
£9.07
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Live Electrical CB120D Live Electrical CB120D 20A Curve D 10kA MCB 1Live Electrical CB120D Live Electrical CB120D 20A Curve D 10kA MCB 2

Live Electrical CB120D 20A Curve D 10kA MCB

10 In stock
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SKU: CB120D
£2.95
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FuseBox INC202 FuseBox INC202 20A Double Pole Contactor 230V 1

FuseBox INC202 20A 230V 2 Pole NO Normally Open AC Modular Contactor

17 In stock
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SKU: INC202
£6.50
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WCED WARC2100-030 WCED 2 Pole 100A 30mA Type A High Immunity RCD

WCED WARC2100-030 2 Pole 100A 30mA Type A High Immunity RCD

6 In stock
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SKU: WARC2100-030
£18.93

2-£17.98£0.95£18.93
3-£17.51£1.42£18.93
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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
£79.50

2-£77.91£1.59£79.50
3-£77.12£2.39£79.50
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FuseBox MT10C323 FuseBox MT10C323 32A Triple Pole 10kA C Curve MCB

FuseBox MT10C323 32A Triple Pole 10kA C Curve MCB

38 In stock
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SKU: MT10C323
£9.51
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FuseBox RTB630304M FuseBox RTB630304M 63A 4 Pole 30MA Type B RCD

FuseBox RTB630304M 63A 4 Pole 30mA Type B RCD

9 In stock
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SKU: RTB630304M
£114.76
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WCED BBP3100 WCED 3P 100A Pin Type Busbar - 1 m

WCED 3P 100A Pin Type Busbar – 1 m

12 In stock
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SKU: BBP3100
£17.00
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Hager MTN140 MCB 6kA B-40

Hager MTN140 MCB 6kA B-40

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SKU: MTN140
£2.38
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Live Electrical CB320B Live Electrical CB320B 3 Pole 20A B Curve 10kA MCB 1Live Electrical CB320B Live Electrical CB320B 3 Pole 20A B Curve 10kA MCB 2

Live Electrical CB320B 3 Pole 20A B Curve 10kA MCB

11 In stock
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SKU: CB320B
£9.99
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Live Electrical TPN12-125S Live Electrical 125 Amp 12 Way TPN Distribution Board with SPD 1Live Electrical TPN12-125S Live Electrical 125 Amp 12 Way TPN Distribution Board with SPD 2

Live Electrical TPN12-125S 125 Amp 12 Way TPN Distribution Board with SPD

Delivery usually within 1-3 working days*
SKU: TPN12-125S
£209.90
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WCED WME10/SP WCED 7 Way SPD Metal Consumer Unit

WCED 7 Way SPD Metal Consumer Unit

1 In stock
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SKU: WME10/SP
£44.25

2-£39.83£4.43£44.25
3-£38.94£5.31£44.25
4-£38.06£6.20£44.25
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WCED WME10 WCED 10 Way Metal Enclosure 1WCED WME10 WCED 10 Way Metal Enclosure 2

WCED 10 Way Metal Enclosure

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SKU: WME10
£29.94

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20-£27.69£2.25£29.94
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WCED WSPD340 WCED Type 2 20kA/40kA 3 Pole Surge Arrestor

WCED WSPD340 Type 2 20kA/40kA 3 Pole Surge Arrestor

1 In stock
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SKU: WSPD340
£19.20

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10-£17.28£1.92£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

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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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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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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