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Circuit Protection

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SPD Surge Protection Devices (109)

WCED WMEV232C WCED A-Type Electric Vehicle 2 Module Enclosure - 32A RCBO C Curve 1WCED WMEV232C WCED A-Type Electric Vehicle 2 Module Enclosure - 32A RCBO C Curve 2

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

Delivery usually within 1-3 working days*
SKU: WMEV232C
£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 WKB106C WCED 1 Pole 6A C Curve 10 kA MCB 1WCED WKB106C WCED 1 Pole 6A C Curve 10 kA MCB 2

WCED 1 Pole 6A Curve C 10kA MCB

7 In stock
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SKU: WKB106C
£3.35

5-£3.22£0.13£3.35
10-£3.13£0.22£3.35
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WCED WKB340C WCED 3 Pole 40A C Curve 10 kA MCB 1WCED WKB340C WCED 3 Pole 40A C Curve 10 kA MCB 2

WCED 3 Pole 40A C Curve 10 kA MCB

3 In stock
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SKU: WKB340C
£9.99

5-£9.59£0.40£9.99
10-£9.34£0.65£9.99
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Live Electrical RA240B-030 Live Electrical Double Pole Type A RCBO - Curve B - 40A 1Live Electrical RA240B-030 Live Electrical Double Pole Type A RCBO - Curve B - 40A 2

Live Electrical Double Pole Type A RCBO – Curve B – 40A

3 In stock
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SKU: RA240B-030
£16.06

3-£15.74£0.32£16.06
5-£15.26£0.80£16.06
10-£14.78£1.28£16.06
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Deligo DSRI16 Deligo Photovoltaic (Solar) DC Rotary Isolator Switch - 16A

Deligo Photovoltaic (Solar) DC Rotary Isolator Switch – 16A

2 In stock
This item cannot be back-ordered
SKU: DSRI16
£24.05 £19.99
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Hager VML118SPDRK 18 Way Main Switch SPD Consumer Unit, featuring a 100A main switch and Type 2 SPD, designed with round knockouts for flexible cable entry. Unlike the VML118SPD, this version does not include a gland. Hager VML118SPDRK 18 Way Main Switch SPD Consumer Unit with Round Knockouts - Open Front

Hager VML118SPDRK 18 Way Main Switch SPD Consumer Unit with Round Knockouts

1 In stock
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SKU: VML118SPDRK
£89.95
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FuseBox TPN15FBX Fusebox TPN15FBX 15 Way 125A Three Phase Board 1FuseBox TPN15FBX Fusebox TPN15FBX 15 Way 125A Three Phase Board 2

Fusebox TPN15FBX 15 Way 125A Three Phase Board

2 In stock
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SKU: TPN15FBX
£294.09
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FuseBox MT10C163 FuseBox MT10C163 16A Triple Pole 10kA C Curve MCB

FuseBox MT10C163 16A Triple Pole 10kA C Curve MCB

15 In stock
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SKU: MT10C163
£9.51
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FuseBox MT10D323 FuseBox MT10D323 32A Triple Pole 10kA D Curve MCB

FuseBox MT10D323 32A Triple Pole 10kA D Curve MCB

9 In stock
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SKU: MT10D323
£9.51
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Axiom RS634 Axiom Rotary Isolator IP65 - 30kW 415V 63Amp 3P + 1 Aux

Axiom RS634 3 Pole 63A IP65 Rotary Isolator Switch

2 In stock
This item cannot be back-ordered
SKU: RS634
£19.90 £15.99
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Live Electrical RD4100-100 Live Electrical 4 Pole Type A 100A 100mA RCD

Live Electrical RDA4100-100 4 Pole Type A 100A 100mA RCD

2 In stock
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SKU: RDA4100-100
£20.99
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WCED WAC4P25CO WCED 4P 25A 2NC 2NO Modular Contactor 1WCED WAC4P25CO WCED 4P 25A 2NC 2NO Modular Contactor 2

WCED 4P 25A 2NC 2NO Modular Contactor

14 In stock
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SKU: WAC4P25CO
£10.43

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5-£9.91£0.52£10.43
10-£9.65£0.78£10.43
20-£9.39£1.04£10.43
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WCED WCT24-100LB WCED Load Balancing Relay + CT Core 1

WLB110 Monitoring Relay

3 In stock
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SKU: WCT24-100LB
£40.49
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Live Electrical LSMC10M-SP Live Electrical 7 Way SPD Metal Consumer Unit 1Live Electrical LSMC10M-SP Live Electrical 7 Way SPD Metal Consumer Unit 2

Live Electrical 7 Way SPD Metal Consumer Unit

8 In stock
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SKU: LSMC10M-SP
£41.90

2-£41.06£0.84£41.90
4-£40.64£1.26£41.90
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WCED WMIP32CSP IP65 Metal A Type 32A C Curve RCBO EV Protection Unit Plus Surge Protection 1

IP65 Metal A Type 32A C Curve RCBO EV Protection Unit Plus Surge Protection

9 In stock
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SKU: WMIP32CSP
£49.99

2-£48.89£1.10£49.99
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5-£46.24£3.75£49.99
10-£44.99£5.00£49.99
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FuseBox RTF400302 Type F RCD 40A 30mA 2P

FuseBox RTF400302 Type F RCD 40A 30mA 2P

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SKU: RTF400302
£44.20
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WCED WKC110B 10kA 1 Pole MCB Curve B 10A

WCED WKC110B 10kA 1 Pole MCB Curve B 10A

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SKU: WKC110B
£2.65
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Deligo GS2/10M 1.2-1.6mm Grommet PE Strip - 10 metres 1

1.2-1.6mm Grommet PE Strip – 10 metres

4 In stock
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SKU: GS2/10M
£5.95
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Hager NBN106A Hager NBN106A Single Pole Type B MCB 6A 10kA

Hager NBN106A Single Pole Type B MCB 6A 10kA

12 In stock
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SKU: NBN106A
£8.94
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Live Electrical TPN18-125S Live Electrical 125 Amp 18 Way TPN Distribution Board with SPD 1Live Electrical TPN18-125S Live Electrical 125 Amp 18 Way TPN Distribution Board with SPD 2

Live Electrical TPN18-125S 125 Amp 18 Way TPN Distribution Board with SPD

Delivery usually within 1-3 working days*
SKU: TPN18-125S
£279.00
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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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