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Circuit Protection

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SPD Surge Protection Devices (107)

Live Electrical RI25DC Live Electrical 4 Pole 25A DC Rotary Isolator Switch 1Live Electrical RI25DC Live Electrical 4 Pole 25A DC Rotary Isolator Switch 2

Live Electrical RI25DC 4 Pole 25A DC Rotary Isolator Switch

3 In stock
More available within 1-3 working days*
SKU: RI25DC
£20.99 £16.10
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WCED WMEPME12/LBK PME Fault Detection Unit with Load Management 12 Mod c/w C40 RCBO Relays and SPD 1WCED WMEPME12/LBK PME Fault Detection Unit with Load Management 12 Mod c/w C40 RCBO Relays and SPD 2

PME / PEN Fault Detection Unit with Load Management 12 Mod c/w C40 RCBO Relays Meter and SPD

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SKU: WMEPME12/LBK
£140.28

2-£137.47£2.81£140.28
3-£136.07£4.21£140.28
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FuseBox MT10C201 FuseBox MT10C201 20A Single Pole 10kA C Curve MCB

FuseBox MT10C201 20A Single Pole 10kA C Curve MCB

16 In stock
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SKU: MT10C201
£3.22
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FuseBox MT10C631 FuseBox MT10C631 63A Single Pole 10kA C Curve MCB

FuseBox MT10C631 63A Single Pole 10kA C Curve MCB

11 In stock
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SKU: MT10C631
£3.34
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FuseBox MT10C203 FuseBox MT10C203 20A Triple Pole 10kA C Curve MCB

FuseBox MT10C203 20A Triple Pole 10kA C Curve MCB

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SKU: MT10C203
£9.51
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FuseBox ABEC Fusebox ABEC TPN Busbar End Caps (Pack of 30)

Fusebox ABEC TPN Busbar End Caps (Pack of 30)

27 In stock
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SKU: ABEC
£0.90
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WCED BBF2100 WCED 2 Pole 100A Busbar Forked Type - 13 Ways

WCED 2 Pole 100A Busbar Forked Type – 13 Ways

19 In stock
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SKU: BBF2100
£8.40
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Live Electrical LSMC18M-SP Live Electrical 15 Way SPD Metal Consumer Unit 1Live Electrical LSMC18M-SP Live Electrical 15 Way SPD Metal Consumer Unit 2

Live Electrical 15 Way SPD Metal Consumer Unit

12 In stock
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SKU: LSMC18M-SP
£51.42
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Live Electrical SA240CABLE Live Electrical 6mm2 Cable Kit for SPD

Live Electrical 6mm2 Cable Kit for SPD

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SKU: SA240CABLE
£3.58
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WCED WME22/SP/15RCBO WCED Consumer Unit Kit with SPD and 15 RCBOs 1

WCED Consumer Unit Kit with SPD and 15 RCBOs

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SKU: WME22/SP/15RCBO
£177.91
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Live Electrical SinglePhaseKit Single Phase Kit for Live Electrical TPN Boards 1Live Electrical SinglePhaseKit Single Phase Kit for Live Electrical TPN Boards 2

Single Phase Kit for Live Electrical TPN Boards

3 In stock
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SKU: SinglePhaseKit
£9.00
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Hager VM04CB Hager VM04CB 25mmx30mm Closed Meter Tail Plate

Hager VM04CB 25mmx30mm Closed Meter Tail Plate

17 In stock
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SKU: VM04CB
£1.50
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Live Electrical CB340D Live Electrical CB340D 3 Pole 40A D Curve 10kA MCB 1Live Electrical CB340D Live Electrical CB340D 3 Pole 40A D Curve 10kA MCB 2

Live Electrical CB340D 3 Pole 40A D Curve 10kA MCB

20 In stock
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SKU: CB340D
£10.99
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Live Electrical MAC4P40 Live Electrical MAC4P40 40A Modular AC Contactor 4 Pole NO 1Live Electrical MAC4P40 Live Electrical MAC4P40 40A Modular AC Contactor 4 Pole NO 2

Live Electrical MAC4P40 40A Modular AC Contactor 4 Pole NO

1 In stock
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SKU: MAC4P40
£14.99
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Live Electrical AFD16B Live Electrical AFDD Combined with Type A 30mA RCBO - 16A

Live Electrical AFDD Combined with Type A 30mA RCBO – 16A

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SKU: AFD16B
£81.50
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FuseBox AFMF24 Fusebox AFMF24 24 Module Flush Mounting Frame Kit 1

Fusebox AFMF24 24 Module Flush Mounting Frame Kit

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SKU: AFMF24
£20.85
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Live Electrical 18 Edition 20 Way Dual Row SPD Consumer Unit Live Electrical 18 Edition 20 Way Dual Row SPD Consumer Unit

Live Electrical 18 Edition 20 Way Dual Row SPD Consumer Unit

5 In stock
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SKU: MCU24M-SP
£79.00
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FuseBox EV32B Fusebox EV32B EV Charger Supply Unit 32A With B Type RCD 1

Fusebox EV32B EV Charger Supply Unit 32A With B Type RCD

5 In stock
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SKU: EV32B
£137.39
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Hager VM05GS Hager Grommet Strip - 5 meters

Hager Grommet Strip – 5 meters

8 In stock
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SKU: VM05GS
£5.55
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Envirograf SCUB1 Envirograf Intumescent Strip SCUB1 for Metal Consumer Units - 100x60mm 1Envirograf SCUB1 Envirograf Intumescent Strip SCUB1 for Metal Consumer Units - 100x60mm 2

Envirograf Intumescent Strip SCUB1 for Metal Consumer Units – 100x60mm

25 In stock
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SKU: SCUB1
£3.18
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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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