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Circuit Protection

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Live Electrical 10kA RCBO 40A Curve C Type A 30mA 1P+N

Live Electrical 10kA RCBO 40A Curve C Type A 30mA 1P+N

32 In stock
More available within 1-3 working days*
SKU: RA140C-030
£10.99
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WCED WMEPME10/LB PME Fault Detection Unit with Load Management 10 Mod c/w C40 RCBO Relays and SPD 1WCED WMEPME10/LB PME Fault Detection Unit with Load Management 10 Mod c/w C40 RCBO Relays and SPD 2

PME / PEN Fault Detection Unit with Load Management 10 Mod c/w C40 RCBO Relays and SPD

Delivery usually within 1-3 working days*
SKU: WMEPME10/LB
£127.40

2-£124.85£2.55£127.40
3-£123.58£3.82£127.40
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FuseBox RTAMC40 FuseBox RTAMC40 40A Mini Type A RCBO 1

FuseBox RTAMC40 40A Mini Type A RCBO

37 In stock
More available within 1-3 working days*
SKU: RTAMC40
£13.50
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WCED WAC4P125 WCED 4 Pole 125A 4NO AC Contactor 1

WCED 4 Pole 125A 230V/400V NO Normally Open AC Modular Contactor

9 In stock
This item cannot be back-ordered
SKU: WAC4P125
£49.99

3-£48.74£1.25£49.99
5-£47.49£2.50£49.99
10-£46.24£3.75£49.99
20-£44.99£5.00£49.99
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3 Phase PME / PEN Fault Detection Unit for 2 x 3 Phase Car ChargersWCED WMTP28-R40CSP 3 Phase PME Fault Detection Unit for 2 x 3 Phase Car Chargers 2

3 Phase PME / PEN Fault Detection Unit for 2 x 3 Phase Car Chargers

Delivery usually within 1-3 working days*
SKU: WMTP28-R40CSP
£248.50

2-£243.53£4.97£248.50
3-£241.05£7.46£248.50
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WCED WMIP40CSP IP65 Metal A Type 40A C Curve RCBO EV Protection Unit Plus Surge Protection 1

IP65 Metal A Type 40A C Curve RCBO EV Protection Unit Plus Surge Protection

Delivery usually within 1-3 working days*
SKU: WMIP40CSP
£49.99

2-£48.89£1.10£49.99
3-£47.49£2.50£49.99
5-£46.24£3.75£49.99
10-£44.99£5.00£49.99
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WCED WARB5100C/PMESP WARB5100C/PMESP 3 Phase PME Fault Detection Unit

3 Phase PME / PEN Fault Detection Unit c/w 5 Pole 100A MCB Type 2 SPD and PME Relay

Delivery usually within 1-3 working days*
SKU: WARB5100C/PMESP
£110.25

2-£108.05£2.21£110.25
3-£106.94£3.31£110.25
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Live Electrical CB163B Live Electrical CB163B 63A Curve B 10kA MCB 1Live Electrical CB163B Live Electrical CB163B 63A Curve B 10kA MCB 2

Live Electrical CB163B 63A Curve B 10kA MCB

13 In stock
More available within 1-3 working days*
SKU: CB163B
£2.95
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FuseBox MT06B501 FuseBox MT06B501 50A MCB Curve B 1

FuseBox MT06B501 50A MCB Curve B

21 In stock
More available within 1-3 working days*
SKU: MT06B501
£1.95
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WCED WME14/SP/9RCBO WCED Consumer Unit Kit with SPD and 9 RCBOs 1

WCED Consumer Unit Kit with SPD and 9 RCBOs

Delivery usually within 1-3 working days*
SKU: WME14/SP/9RCBO
£119.45
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FuseBox Bi-Directional Mini RCBO 06A C Curve 30mA Type A - Compact and Reliable Protection

FuseBox Bi-Directional Mini RCBO 32A C Curve 30mA Type A

35 In stock
More available within 1-3 working days*
SKU: RTAMC32BD
£16.95
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Live Electrical EN4030/200 Live Electrical Metal Enclosure IP65 H:400 x W:300 x D:200mm 1Live Electrical EN4030/200 Live Electrical Metal Enclosure IP65 H:400 x W:300 x D:200mm 2

Live Electrical EN4030/200 IP65 Metal Enclosure H:400 x W:300 x D:200mm

Delivery usually within 1-3 working days*
SKU: EN4030/200
£46.75
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Live Electrical SAMODKIT240 Live Electrical SPD Kit SA240 Type 2

Live Electrical SA240 SPD Type 2 Kit

Delivery usually within 1-3 working days*
SKU: SAMODKIT240
£25.90 £21.90
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Live Electrical RI440 40A Weatherproof Rotary Isolator Switch 4 Pole 1Live Electrical RI440 40A Weatherproof Rotary Isolator Switch 4 Pole 2

Live Electrical RI440 4 Pole 40A IP65 Rotary Isolator Switch

7 In stock
More available within 1-3 working days*
SKU: RI440
£15.90
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Live Electrical CB140C Live Electrical CB140C 40A Curve C 10kA MCB 1Live Electrical CB140C Live Electrical CB140C 40A Curve C 10kA MCB 2

Live Electrical CB140C 40A Curve C 10kA MCB

14 In stock
More available within 1-3 working days*
SKU: CB140C
£2.95
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Timeguard IS3N-32 Timeguard Weathersafe Rotary Isolator Switch – 3 Pole 32A

Timeguard IS3N-32 3 Pole 32A IP65 Rotary Isolator Switch

1 In stock
This item cannot be back-ordered
SKU: IS3N-32
£13.50
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WCED WME44100 WCED 4 Module Metal Enclosure and 100A 4P Metal Meter Isolator 1

WCED WME44100 4 Pole 100A Metal Meter Isolator

Delivery usually within 1-3 working days*
SKU: WME44100
£17.09

3-£16.24£0.85£17.09
5-£15.81£1.28£17.09
10-£15.38£1.71£17.09
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WCED WPGU04/616 Plastic IP65 Garage Consumer Unit - 63A Type A RCD 6A/16A B MCBs Cost-Effective Consumer Unit for Internal or External Use – Includes 63A RCD and Pre-Fitted MCBs

WCED WPGU04/616 Plastic IP65 Garage Consumer Unit – 63A Type A RCD 6A/16A B MCBs

Delivery usually within 1-3 working days*
SKU: WPGU04/616
£23.66

3-£23.07£0.59£23.66
5-£22.48£1.18£23.66
10-£21.89£1.77£23.66
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WCED WAC2P125 WCED 2 Pole 125A 2NO AC Contactor

WCED 2 Pole 230V 125A NO Normally Open AC Modular Contactor

5 In stock
More available within 1-3 working days*
SKU: WAC2P125
£30.60

3-£29.84£0.77£30.60
5-£29.07£1.53£30.60
10-£28.31£2.30£30.60
20-£27.54£3.06£30.60
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FuseBox RTA102030C FuseBox RTA102030C 20A 10kA 30mA C Curve Type A RCBO

FuseBox RTA102030C 20A 10kA 30mA C Curve Type A RCBO

22 In stock
More available within 1-3 working days*
SKU: RTA102030C
£17.44
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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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