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Circuit Protection

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Envirograf SCUB2 Envirograf SCUB2 Intumescent Strip for Metal Consumer Units - 150x60mm 1Envirograf SCUB2 Envirograf SCUB2 Intumescent Strip for Metal Consumer Units - 150x60mm 2

Envirograf SCUB2 Intumescent Strip for Metal Consumer Units – 150x60mm

15 In stock
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SKU: SCUB2
£3.82
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Live Electrical SPB Live Electrical 1 Way Mushroom Head Stop Push Button 1

Live Electrical SPB 1 Way Mushroom Head Stop Push Button

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SKU: SPB
£7.95
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WCED WME04/MS100 WCED 2 Way Main Switch Consumer Unit 1WCED WME04/MS100 WCED 2 Way Main Switch Consumer Unit 2

WCED 2 Way Main Switch Consumer Unit

1 In stock
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SKU: WME04/MS100
£20.99
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WCED WMC132C WCED Miniature Circuit Breaker 6kA Curve C - 32A 1WCED WMC132C WCED Miniature Circuit Breaker 6kA Curve C - 32A 2

WCED Miniature Circuit Breaker 6kA Curve C – 32A

4 In stock
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SKU: WMC132C
£1.53
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WCED WMS4100 WCED 4 Pole 100A Main Switch

WCED 4 Pole 100A Main Switch

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SKU: WMS4100
£8.03

3-£7.63£0.40£8.03
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WCED WKB232B WCED 2 Pole 32A B Curve 10 kA MCB 1WCED WKB232B WCED 2 Pole 32A B Curve 10 kA MCB 2

WCED 2 Pole 32A B Curve 10 kA MCB

5 In stock
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SKU: WKB232B
£6.99

5-£6.71£0.28£6.99
10-£6.54£0.45£6.99
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Live Electrical RA220B-030 Live Electrical Double Pole Type A RCBO - Curve B - 20A 1Live Electrical RA220B-030 Live Electrical Double Pole Type A RCBO - Curve B - 20A 2

Live Electrical Double Pole Type A RCBO – Curve B – 20A

1 In stock
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SKU: RA220B-030
£16.06
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Live Electrical RA232C-030 Live Electrical Double Pole Type A RCBO - Curve C - 32A 1Live Electrical RA232C-030 Live Electrical Double Pole Type A RCBO - Curve C - 32A 2

Live Electrical Double Pole Type A RCBO – Curve C – 32A

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SKU: RA232C-030
£16.06
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Live Electrical SA240 Live Electrical 2 Pole 20kA/40kA Type 2 Surge Protective Device

Live Electrical SA240 2 Pole 20kA/40kA Type 2 SPD Surge Protective Device

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SKU: SA240
£17.75
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Live Electrical SA420 Live Electrical 4 Pole 10kA/20kA Type 2 Surge Protective Device

Live Electrical SA420 4 Pole 10kA/20kA Type 2 Surge Protective Device

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SKU: SA420
£31.55
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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

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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

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SKU: TPN15FBX
£294.09
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FuseBox TPNEBFB FuseBox TPNEBFB 14 Way TPN Extension Board 1FuseBox TPNEBFB FuseBox TPNEBFB 14 Way TPN Extension Board 2

FuseBox TPNEBFB 14 Way TPN Extension Board

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SKU: TPNEBFB
£91.00
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FuseBox MT10B631 FuseBox MT10B631 63A Single Pole 10kA B Curve MCB

FuseBox MT10B631 63A Single Pole 10kA B Curve MCB

16 In stock
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SKU: MT10B631
£3.34
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FuseBox MT10C161 FuseBox MT10C161 16A Single Pole 10kA C Curve MCB

FuseBox MT10C161 16A Single Pole 10kA C Curve MCB

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SKU: MT10C161
£3.22
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FuseBox MT10C162 FuseBox MT10C162 16A Double Pole 10kA C Curve MCB

FuseBox MT10C162 16A Double Pole 10kA C Curve MCB

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SKU: MT10C162
£6.68
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FuseBox MT10B503 FuseBox MT10B503 50A Triple Pole 10kA B Curve MCB

FuseBox MT10B503 50A Triple Pole 10kA B Curve MCB

13 In stock
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SKU: MT10B503
£9.88
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FuseBox MT10B633 FuseBox MT10B633 63A Triple Pole 10kA B Curve MCB

FuseBox MT10B633 63A Triple Pole 10kA B Curve MCB

11 In stock
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SKU: MT10B633
£9.88
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FuseBox MT10C253 FuseBox MT10C253 25A Triple Pole 10kA C Curve MCB

FuseBox MT10C253 25A Triple Pole 10kA C Curve MCB

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SKU: MT10C253
£9.51
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FuseBox RTA105030C Fusebox RTA105030C Single Pole Type A C Curve RCBO

Fusebox RTA105030C 50A Single Pole Type A C Curve RCBO

9 In stock
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SKU: RTA105030C
£17.44
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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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