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Circuit Protection

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Live Electrical ENC465 Live Electrical 4 Way Plastic Enclosure IP65 1

Live Electrical ENC465 IP65 4 Way Plastic Enclosure

Delivery usually within 1-3 working days*
SKU: ENC465
£9.15
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WCED WSPDTE-4 WCED 4 Pole 4 Module Type 1+2 SPD

WCED 4 Pole 4 Module Type 1+2 SPD

3 In stock
More available within 1-3 working days*
SKU: WSPDTE-4
£106.18

3-£100.87£5.31£106.18
5-£98.22£7.96£106.18
10-£95.56£10.62£106.18
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Live Electrical CB316D Live Electrical CB316D 3 Pole 16A D Curve 10kA MCB 1Live Electrical CB316D Live Electrical CB316D 3 Pole 16A D Curve 10kA MCB 2

Live Electrical CB316D 3 Pole 16A D Curve 10kA MCB

11 In stock
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SKU: CB316D
£9.99
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WCED WAC2P20CO WCED WAC2P20CO 2 Pole 20A Normally Open and Closed AC Modular Contactor

WCED WAC2P20CO 2 Pole 20A Normally Open and Closed AC Modular Contactor

3 In stock
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SKU: WAC2P20CO
£10.43

3-£10.17£0.26£10.43
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 ADR440C-030 WCED 4 Pole Type A 40A 30mA C Curve High Immunity RCBO 1

WCED 4 Pole Type A 40A 30mA C Curve High Immunity RCBO

4 In stock
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SKU: ADR440C-030
£33.45
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Live Electrical EMCU2-A Live Electrical 2 Way Empty DIN Rail Metal Enclosure With Lid EMCU2-A

Live Electrical EMCU2-A 2 Way Empty DIN Rail Metal Enclosure With Lid

9 In stock
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SKU: EMCU2-A
£8.90
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Live Electrical CB140B Live Electrical CB140B 40A Curve B 10kA MCB 1Live Electrical CB140B Live Electrical CB140B 40A Curve B 10kA MCB 2

Live Electrical CB140B 40A Curve B 10kA MCB

14 In stock
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SKU: CB140B
£2.95
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Live Electrical CB150B Live Electrical CB150B 50A Curve B 10kA MCB 1Live Electrical CB150B Live Electrical CB150B 50A Curve B 10kA MCB 2

Live Electrical CB150B 50A Curve B 10kA MCB

3 In stock
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SKU: CB150B
£2.95
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FuseBox AFDD063230B FuseBox AFDD063230B 32A AFDD RCBO 30mA 1FuseBox AFDD063230B FuseBox AFDD063230B 32A AFDD RCBO 30mA 3

FuseBox AFDD063230B 32A AFDD RCBO 30mA

1 In stock
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SKU: AFDD063230B
£84.65
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Grommet Strip for Metal Consumer Units

Grommet Strip for Metal Consumer Units – 0.9m

18 In stock
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SKU: PST9
£0.83
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Axiom STDL35 DIN Rail 35mm x 7.5mm - 1 meter

DIN Rail 35mm x 7.5mm – 1 meter

15 In stock
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SKU: STDL35
£2.95
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WCED ADR432C-030 WCED 4 Pole Type A 32A 30mA C Curve High Immunity RCBO 1

WCED 4 Pole Type A 32A 30mA C Curve High Immunity RCBO

Delivery usually within 1-3 working days*
SKU: ADR432C-030
£33.45
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Live Electrical EMCU4-SP Live Electrical 4 Way Metal CU with 20/40kA SPD and 100A Main Switch 1Live Electrical EMCU4-SP Live Electrical 4 Way Metal CU with 20/40kA SPD and 100A Main Switch 2

Live Electrical 4 Way Metal CU with 20/40kA SPD and 100A Main Switch

8 In stock
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SKU: EMCU4-SP
£33.99
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FuseBox ABTR Fusebox ABTR Bell Transformer 1

Fusebox ABTR Bell Transformer

2 In stock
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SKU: ABTR
£7.24
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Live Electrical RA140C-030 Live 30mA 40A RCBO 10kA Curve C Type A 1Live Electrical RA140C-030 Live 30mA 40A RCBO 10kA Curve C Type A 2

Live 30mA 40A RCBO 10kA Curve C Type A

32 In stock
This item cannot be back-ordered
SKU: RA140C-030
£10.99
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FuseBox RTAMC40 FuseBox RTAMC40 40A Mini Type A RCBO 1

FuseBox RTAMC40 40A Mini Type A RCBO

37 In stock
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SKU: RTAMC40
£13.50
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WCED WAC4P125 WCED 4 Pole 125A 4NO AC Contactor 1

WCED 4 Pole 125A 230V/400V NO Normally Open AC Modular Contactor

9 In stock
This item cannot be back-ordered
SKU: WAC4P125
£49.99

3-£48.74£1.25£49.99
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10-£46.24£3.75£49.99
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Live Electrical CB163B Live Electrical CB163B 63A Curve B 10kA MCB 1Live Electrical CB163B Live Electrical CB163B 63A Curve B 10kA MCB 2

Live Electrical CB163B 63A Curve B 10kA MCB

13 In stock
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SKU: CB163B
£2.95
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Envirograf EBU0 EnviroBurst Automatic Fire Suppression System - 150mm Long Tube 1Envirograf EBU0 EnviroBurst Automatic Fire Suppression System - 150mm Long Tube 2

EnviroBurst Automatic Fire Suppression System – 150mm Long Tube

9 In stock
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SKU: EBU0
£23.49
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WCED WMEPME10/LB PME Fault Detection Unit with Load Management 10 Mod c/w C40 RCBO Relays and SPD 1WCED WMEPME10/LB PME Fault Detection Unit with Load Management 10 Mod c/w C40 RCBO Relays and SPD 2

PME / PEN Fault Detection Unit with Load Management 10 Mod c/w C40 RCBO Relays and SPD

2 In stock
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SKU: WMEPME10/LB
£127.40

2-£124.85£2.55£127.40
3-£123.58£3.82£127.40
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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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