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Circuit Protection

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Live Electrical RT280-100 Live Electrical 2 Pole Time Delay 100mA 80A RCD

Live Electrical RT280-100 2 Pole Time Delay 100mA 80A RCD

2 In stock
More available within 1-3 working days*
SKU: RT280-100
£26.50
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WCED WME12/MS100 WCED 10 Way Main Switch RCBO Consumer Unit

WCED 8 Way Main Switch Consumer Unit

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SKU: WME10/MS100
£31.76
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WCED WMGU04/620 Metal Garage Consumer Unit - 63A Type A RCD 6A/20A B MCBs

WCED WMGU04/620 Metal Garage Consumer Unit – 63A Type A RCD 6A/20A B MCBs

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SKU: WMGU04/620
£25.09

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WCED WMMS/616 WCED Metal Garage Unit - 100A Main Switch 6A/16A B MCB 1WCED WMMS/616 WCED Metal Garage Unit - 100A Main Switch 6A/16A B MCB 2

WCED Metal Garage Unit – 100A Main Switch 6A/16A B MCB

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SKU: WMMS/616
£19.88
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WCED WMC110B WCED Miniature Circuit Breaker 6kA Curve B - 10A 1WCED WMC110B WCED Miniature Circuit Breaker 6kA Curve B - 10A 2

WCED Miniature Circuit Breaker 6kA Curve B – 10A

20 In stock
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SKU: WMC110B
£1.53
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WCED WKB5100C-ST WCED 100A C Curve 5 Pole MCB 10kA + 230V Shunt Trip 1WCED WKB5100C-ST WCED 100A C Curve 5 Pole MCB 10kA + 230V Shunt Trip 2

WCED 100A C Curve 5 Pole MCB 10kA + 230V Shunt Trip

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SKU: WKB5100C-ST
£23.99

5-£23.03£0.96£23.99
10-£22.43£1.56£23.99
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WCED WKB216B WCED 2 Pole 16A B Curve 10 kA MCB 1WCED WKB216B WCED 2 Pole 16A B Curve 10 kA MCB 2

WCED 2 Pole 16A B Curve 10 kA MCB

10 In stock
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SKU: WKB216B
£6.99

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WCED WKB216C WCED 2 Pole 16A C Curve 10 kA MCB 1WCED WKB216C WCED 2 Pole 16A C Curve 10 kA MCB 2

WCED 2 Pole 16A C Curve 10 kA MCB

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SKU: WKB216C
£6.99

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WCED WAC4P32 WCED 4 Pole 32A 4NO AC Contactor 1

WCED 4 Pole 230/400V 32A NO Normally Open AC Modular Contactor

8 In stock
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SKU: WAC4P32
£13.99

3-£13.64£0.35£13.99
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WCED WKB140C WCED 1 Pole 40A C Curve 10 kA MCB 1WCED WKB140C WCED 1 Pole 40A C Curve 10 kA MCB 2

WCED 1 Pole 40A Curve C 10kA MCB

2 In stock
More available within 1-3 working days*
SKU: WKB140C
£3.35

5-£3.22£0.13£3.35
10-£3.13£0.22£3.35
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Live Electrical SA220 Live Electrical 2 Pole 10kA/20kA Type 2 Surge Protective Device

Live Electrical SA220 2 Pole 10kA/20kA Type 2 SPD Surge Protective Device

8 In stock
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SKU: SA220
£15.95
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WCED ATDR463-100 Time Delay Type A 4 Pole 63A 100mA RCD

WCED ATDR463-100 Time Delay Type A 4 Pole 63A 100mA RCD

Delivery usually within 1-3 working days*
SKU: ATDR463-100
£27.24

2-£25.88£1.36£27.24
3-£25.20£2.04£27.24
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WCED WAC4P40NC/24 WCED 4 Pole 40A 24V Normally Closed AC Contactor 1

WCED 4 Pole 40A 24V NC Normally Closed AC Modular Contactor

8 In stock
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SKU: WAC4P40NC/24
£13.49

3-£13.15£0.34£13.49
5-£12.82£0.67£13.49
10-£12.48£1.01£13.49
20-£12.14£1.35£13.49
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Wago 788-354 Wago 788 Relay Module with 1 Changeover Contact for Lamp Loads - 24V DC 16A 2.5 mm² Grey 1Wago 788-354 Wago 788 Relay Module with 1 Changeover Contact for Lamp Loads - 24V DC 16A 2.5 mm² Grey 2

Wago 788-354 Relay Module with 1 Changeover Contact for Lamp Loads – 24V DC 16A 2.5mm² Grey

15 In stock
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SKU: 788-354
£13.94
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FuseBox TPN08FB Fusebox TPN08FB 8 Way 125A Three Phase Board 1FuseBox TPN08FB Fusebox TPN08FB 8 Way 125A Three Phase Board 2

Fusebox TPN08FB 8 Way 125A Three Phase Board

Out of stock
This item cannot be back-ordered
SKU: TPN08FB
£187.04
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FuseBox MT10C061 FuseBox MT10C061 6A Single Pole 10kA C Curve MCB

FuseBox MT10C061 6A Single Pole 10kA C Curve MCB

6 In stock
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SKU: MT10C061
£3.22
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FuseBox RTA105030B FuseBox RTA105030B 50A 10kA 30mA B Curve Type A RCBO

FuseBox RTA105030B 50A 10kA 30mA B Curve Type A RCBO

11 In stock
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SKU: RTA105030B
£17.44
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FuseBox TPNSPLFB Fusebox TPNSPLFB 125A Single Phasing Conversion Kit

Fusebox TPNSPLFB 125A Single Phasing Conversion Kit

11 In stock
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SKU: TPNSPLFB
£1.99
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Live Electrical RD440-100 Live Electrical 4 Pole Type A 40A 100mA RCD

Live Electrical RDA440-100 4 Pole Type A 40A 100mA RCD

1 In stock
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SKU: RDA440-100
£15.99
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Hager ADC916R Hager 30mA Type A 16A 6kA C Curve 1M 1P+N Bi-Directional RCBO

Hager ADC916R 30mA Type A 16A 6kA C Curve 1M 1P+N Bi-Directional RCBO

1 In stock
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SKU: ADC916R
£19.43
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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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