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Circuit Protection

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Envirograf | SCUB1 | Intumescent Strip for Metal Consumer Units | 100x60mm

21 In Stock
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SKU: SCUB1
£3.18

WCED WMCU440SP Whitecliffe Metal Unit 100A Main Switch and Type 2 SPD Surge Protection

4 In Stock
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SKU: WMCU440SP
£33.44

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

Available to Order
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Usually 2 - 3 Working Days
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SKU: RA206B-030
£13.99

PME / PEN Fault Detection Unit IP65 with Load Management 12 Mod c/w C40 RCBO Relays and SPD

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SKU: WPEPME12/LB
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1 £130.71
2+ £126.79
3+ £124.17
£130.71

FuseBox MT10B631 63A Single Pole 10kA B Curve MCB

12 In Stock
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SKU: MT10B631
£3.34

FuseBox MT10B633 63A Triple Pole 10kA B Curve MCB

10 In Stock
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SKU: MT10B633
£9.88

FuseBox MT10C253 25A Triple Pole 10kA C Curve MCB

4 In Stock
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SKU: MT10C253
£9.51

FuseBox MT10C633 63A Triple Pole 10kA C Curve MCB

3 In Stock
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SKU: MT10C633
£9.88

WCED WAC4P25CO – 4 Pole 25A 2NO 2NC 230V AC Modular Contactor

1 In Stock
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SKU: WAC4P25CO
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1 - 2 £10.95
3+ £10.68
5+ £10.40
10+ £10.13
20+ £9.85
£10.95

WCED WAC4P63NC – 4 Pole 63A 4NC 230V AC Modular Contactor

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SKU: WAC4P63NC
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1 - 2 £14.16
3+ £13.81
5+ £13.45
10+ £13.10
20+ £12.74
£14.16

Live Electrical DCM250C 2 Pole C Curve 6kA 50A 600V DC MCB

1 In Stock
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SKU: DCM250C
£9.50

WCED Consumer Unit Kit with SPD and 15 RCBOs

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SKU: WME22/SP/15RCBO
£175.11

Hager ADB420U RCBO 10kA B-20A 30mA Type A

4 In Stock
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SKU: ADB420U
£37.99

WCED | WKC110B | 10kA | Curve B | 1 Pole Bi-Directional MCB | 10A

8 In Stock
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SKU: WKC110B
£2.96

WCED | WKC150C | 10kA | Curve C | 1 Pole Bi-Directional MCB | 50A

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SKU: WKC150C
£2.96

Fusebox BB1003P 100A 3P Insulated Busbar – 1 meter

2 In Stock
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SKU: BB1003P
£40.95

Live Electrical EMU2 2 Way Empty DIN Rail Metal Enclosure With Lid

5 In Stock
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SKU: EMU2
£7.85

Garo DCBOGRB16 30mA Type A Compact RCBO 16A B Curve

11 In Stock
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SKU: DCBOGRB16
£10.99

FuseBox | MAFDD063230B | 6kA | 30mA | 32A Mini AFDD

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Usually 2 - 4 Working Days
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SKU: MAFDD063230B
£79.99

Live Electrical | AMR106B-100 | 100mA Bi-Directional Type A Compact RCBO 6A B Curve

18 In Stock
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SKU: AMR106B-100
£9.99

Showing 601–620 of 2375 results

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.

Thousands of products in stock ready for next day delivery. Friendly and reliable service, competitive prices.

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.