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Circuit Protection

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SPD Surge Protection Devices (107)

Live Electrical LSMC10/100 100A Main Switch 8 Way Consumer Unit

Live Electrical LSMC10/100 100A Main Switch 8 Way Consumer Unit

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SKU: LSMC10/100
£27.52
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Live Electrical LSMC14/100 100A Main Switch 12 Way Consumer Unit

Live Electrical LSMC14/100 100A Main Switch 12 Way Consumer Unit

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SKU: LSMC14/100
£32.64
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WCED WKC150C 10kA 1 Pole MCB Curve C 50A

WCED WKC150C 10kA 1 Pole MCB Curve C 50A

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SKU: WKC150C
£2.65

5-£2.54£0.11£2.65
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WCED WKC340C 10kA 3 Pole MCB Curve C 40A

WCED WKC340C 10kA 3 Pole MCB Curve C 40A

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SKU: WKC340C
£9.95

5-£9.55£0.40£9.95
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WCED WFD120B-030 Bi-Directional Type A 30mA B Curve 20A AFDD

WCED WFD120B-030 Bi-Directional Type A 30mA B Curve 20A AFDD

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SKU: WFD120B-030
£66.15

3-£63.50£2.65£66.15
5-£61.52£4.63£66.15
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Niglon RCBO1-40/30SSAX 40A Curve B 30mA A Type RCBO

Niglon RCBO1-40/30SSAX 40A Curve B 30mA A Type RCBO

77 In stock
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SKU: RCBO1-40/30SSAX
£13.20
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Niglon RCBO1-32/30SAX2 32A RCBO – Type A, Curve B, 30mA, 6kA, Bi-Directional, Compact 18mm RCBO.

Niglon RCBO1-32/30SAX2 32A Curve B 30mA Bi-Directional A Type RCBO

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SKU: RCBO1-32/30SAX2
£15.18
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Niglon RCBO1-40/30SAX2 40A RCBO – Type A, Curve B, 30mA, Bi-Directional, 6kA, Compact RCBO for high-load circuits.

Niglon RCBO1-40/30SAX2 40A Curve B 30mA Bi-Directional A Type RCBO

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SKU: RCBO1-40/30SAX2
£15.18
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Live Electrical AMR140B-100 40A RCBO with 100mA Type A protection and bi-directional design for PV installations Live Electrical AMR140B-100 100mA Bi-Directional Type A Compact RCBO 40A B Curve

Live Electrical AMR140B-100 100mA Bi-Directional Type A Compact RCBO 40A B Curve

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SKU: AMR140B-100
£9.99
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Niglon M3CU16SP/Kit 13 Way SPD Consumer Unit Kit with 10 RCBOs Niglon M3CU16SP/Kit 13 Way SPD Consumer Unit Kit with 10 RCBOs

Niglon M3CU16SP/10RCBO 13 Way SPD Consumer Unit Kit with 10 RCBOs

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SKU: M3CU16SP/10RCBO
£149.51
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Hager ARL982U AFDD 32A RCBO – 1-module protective device with arc fault, short-circuit, overload, and residual current protection.

Hager ARL982U AFDD with 30mA RCBO 32A – Curve C Type A with 1m Neutral Fly Lead

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SKU: ARL982U
£111.00
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Hager JK11003S Hager JK11003S 100A 3 Pole Mains Switch Incomer Kit 1Hager JK11003S Hager JK11003S 100A 3 Pole Mains Switch Incomer Kit 2

Hager JK11003S 100A 3 Pole Mains Switch Incomer Kit

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SKU: JK11003S
£42.49
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Hager JK125BSP

Hager JK125BSP 125A Single Phasing Kit

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SKU: JK125BSP
£21.17
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Hager VML402AH 2 Way 40A Type A RCD Garage Consumer Unit Hager VML402AH 2 Way 40A Type A RCD Garage Consumer Unit

Hager VML402AH 2 Way 40A Type A RCD Garage Consumer Unit

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SKU: VML402AH
£49.50
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Hager VML406AH Consumer Unit

Hager VML406AH 6 Way 63A RCD Consumer Unit

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SKU: VML406AH
£56.52
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Hager NCN163A Hager NCN163A Single Pole Type C MCB 63A 10kA

Hager NCN163A Single Pole Type C MCB 63A 10kA

3 In stock
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SKU: NCN163A
£10.12
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Hager SBN240 Hager SBN240 40A Double Pole Isolator

Hager SBN240 40A Double Pole Isolator

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£28.70
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Live Electrical TPN10-125 Live Electrical TPN10-125 125A 10 Way TPN Distribution Board 1Live Electrical TPN10-125 Live Electrical TPN10-125 125A 10 Way TPN Distribution Board 2

Live Electrical TPN10-125 125A 10 Way TPN Distribution Board

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SKU: TPN10-125
£139.90
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Live Electrical TPN14-125 Live Electrical TPN14-125 125A 14 Way TPN Distribution Board 1Live Electrical TPN14-125 Live Electrical TPN14-125 125A 14 Way TPN Distribution Board 2

Live Electrical TPN14-125 125A 14 Way TPN Distribution Board

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Live Electrical TPN08-250 250A Live Electrical 8 Way TPN Distribution Board 1Live Electrical TPN08-250 250A Live Electrical 8 Way TPN Distribution Board 2

250A Live Electrical 8 Way TPN Distribution Board

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SKU: TPN08-250
£313.85
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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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