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Circuit Protection

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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

13 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

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SKU: CB363B
£10.99
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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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Live Electrical AFD20B Live Electrical AFDD Combined with Type A 30mA RCBO - 20A

Live Electrical AFDD Combined with Type A 30mA RCBO – 20A

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SKU: AFD20B
£81.50
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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

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SKU: AFDD061630B
£84.65
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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
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FuseBox SPDCUKITT1 Fusebox SPDCUKITT1 TYPE 1

Fusebox SPDCUKITT1 Type 1,2 & 3 Surge Protection Device Kit

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SKU: SPDCUKITT1
£109.00
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FuseBox F1004E Fusebox F1004E 4 Module Metal Enclosure

Fusebox F1004E 4 Module Metal Enclosure

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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

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SKU: WAC2P100
£25.50

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Live Electrical CS3P63 3 Pole 63A Changeover Switch

Live Electrical CS3P63 3 Pole 63A Changeover Switch

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SKU: CS3P63
£36.90
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Live Electrical RA206C-030 Live Electrical Double Pole Type A RCBO - Curve C - 6A 1Live Electrical RA206C-030 Live Electrical Double Pole Type A RCBO - Curve C - 6A 2

Live Electrical Double Pole Type A RCBO – Curve C – 6A

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SKU: RA206C-030
£16.06
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WCED WER06C-030 WCED Double Pole Type A 30mA RCBO Curve C - 6A

WCED Double Pole Type A 30mA RCBO Curve C – 16A

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SKU: WER16C-030
£16.80
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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

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WCED WME10/SP/5RCBO WCED Consumer Unit Kit with SPD and 5 RCBOs 1

WCED Consumer Unit Kit with SPD and 5 RCBOs

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SKU: WME10/SP/5RCBO
£82.25
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FuseBox IP65 6 Way Metal Enclosure – Grey (A65E06MGY) FuseBox A65E06MGY IP65 6 Way Metal Enclosure – Grey

FuseBox A65E06MGY IP65 6 Way Metal Enclosure – Grey

6 In stock
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SKU: A65E06MGY
£41.54

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Fusebox F2004RA 4 Way 63A RCD Consumer Unit 1

Fusebox F2004RA 4 Way Type A 63A RCD Consumer Unit

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SKU: F2004RA
£33.58
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FuseBox AFMF14 Fusebox AFMF14 14 Module Flush Mounting Frame Kit 1

Fusebox AFMF14 14 Module Flush Mounting Frame Kit

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SKU: AFMF14
£17.00
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Live Electrical EN5040/200 IP65 Metal Enclosure, 500x400x200mm, steel construction with RAL7035 epoxy powder coat, includes galvanised mounting plate and polyurethane foamed gasket for watertight sealing.Live Electrical EN5040/200 Live Electrical Metal Enclosure IP65 H:500 x W:400 x D:200mm 2

Live Electrical EN5040/200 IP65 Metal Enclosure H:500 x W:400 x D:200mm

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SKU: EN5040/200
£64.90
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WCED WEVKIT63 EV Consumer Unit with B Type 40A RCD and C40 MCB 1WCED WEVKIT63 EV Consumer Unit with B Type 40A RCD and C40 MCB 2

EV Consumer Unit with B Type 40A RCD and C40 MCB

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SKU: WEVKIT63
£102.88
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WCED WME08/SP WCED 5 Way SPD Metal Consumer Unit

WCED 5 Way SPD Metal Consumer Unit

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SKU: WME08/SP
£43.50
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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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