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Circuit Protection

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SPD Surge Protection Devices

SPD Surge Protection Devices (109)

WCED WME12/MS100 WCED 10 Way Main Switch RCBO Consumer Unit

WCED 6 Way Main Switch Consumer Unit

Delivery usually within 1-3 working days*
SKU: WME08/MS100
£27.11

2-£24.40£2.71£27.11
3-£23.86£3.25£27.11
4-£23.31£3.80£27.11
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WCED WMMS/620 WCED Metal Garage Unit - 100A Main Switch 6A/20A B MCB

WCED Metal Garage Unit – 100A Main Switch 6A/20A B MCB

Delivery usually within 1-3 working days*
SKU: WMMS/620
£19.88
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WCED WME08/SP WCED 5 Way SPD Metal Consumer Unit

WCED 5 Way SPD Metal Consumer Unit

1 In stock
More available within 1-3 working days*
SKU: WME08/SP
£43.50

2-£39.15£4.35£43.50
3-£38.28£5.22£43.50
4-£37.41£6.09£43.50
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WCED WME22/SP WCED 19 Way SPD Metal Consumer Unit

WCED 19 Way SPD Metal Consumer Unit

4 In stock
More available within 1-3 working days*
SKU: WME22/SP
£59.00

2-£53.10£5.90£59.00
3-£51.92£7.08£59.00
4-£50.74£8.26£59.00
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WCED WMC120C WCED Miniature Circuit Breaker 6kA Curve C - 20A 1WCED WMC120C WCED Miniature Circuit Breaker 6kA Curve C - 20A 2

WCED Miniature Circuit Breaker 6kA Curve C – 20A

3 In stock
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SKU: WMC120C
£1.53

5-£1.47£0.06£1.53
10-£1.43£0.10£1.53
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WCED WMEV240C WCED A-Type Electric Vehicle 2 Module Enclosure - 40A RCBO C Curve 1WCED WMEV240C WCED A-Type Electric Vehicle 2 Module Enclosure - 40A RCBO C Curve 2

WCED A-Type Electric Vehicle 2 Module Enclosure – 40A RCBO C Curve

1 In stock
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SKU: WMEV240C
£25.99

2-£24.69£1.30£25.99
3-£24.04£1.95£25.99
5-£23.39£2.60£25.99
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WCED WKB450C WCED 4 Pole 50A C Curve 10 kA MCB 1WCED WKB450C WCED 4 Pole 50A C Curve 10 kA MCB 2

WCED 4 Pole 50A C Curve 10 kA MCB

2 In stock
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SKU: WKB450C
£13.45

5-£12.91£0.54£13.45
10-£12.58£0.87£13.45
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Live Electrical RA240C-030 Live Electrical Double Pole Type A RCBO - Curve C - 40A 1Live Electrical RA240C-030 Live Electrical Double Pole Type A RCBO - Curve C - 40A 2

Live Electrical Double Pole Type A RCBO – Curve C – 40A

6 In stock
More available within 1-3 working days*
SKU: RA240C-030
£16.06

3-£15.74£0.32£16.06
5-£15.26£0.80£16.06
10-£14.78£1.28£16.06
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WCED ATDR280-100 WCED Time Delay Type A 2 Pole 80A 100mA RCD

WCED ATDR280-100 Time Delay Type A 2 Pole 80A 100mA RCD

Delivery usually within 1-3 working days*
SKU: ATDR280-100
£27.23

2-£25.87£1.36£27.23
3-£25.19£2.04£27.23
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Wiska 10111773 Wiska 10 Way Consumer Unit Relocation Kit CUR 818 1Wiska 10111773 Wiska 10 Way Consumer Unit Relocation Kit CUR 818 2

Wiska CUR 818 10 Way Consumer Unit Relocation Kit

1 In stock
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SKU: 10111773
£58.95
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FuseBox TPN03FBX Fusebox TPN03FBX 3 Way 125A Three Phase Board 1FuseBox TPN03FBX Fusebox TPN03FBX 3 Way 125A Three Phase Board 2

Fusebox TPN03FBX 3 Way 125A Three Phase Board

1 In stock
This item cannot be back-ordered
SKU: TPN03FBX
£195.64
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FuseBox RTA104030C FuseBox RTA104030C 40A 10kA 30mA C Curve Type A RCBO

FuseBox RTA104030C 40A 10kA 30mA C Curve Type A RCBO

31 In stock
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SKU: RTA104030C
£17.44
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Live Electrical RD480-030 Live Electrical 4 Pole Type A 80A 30mA RCD

Live Electrical RDA480-030 4 Pole Type A 80A 30mA RCD

8 In stock
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SKU: RDA480-030
£19.99
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WCED BBP2100 WCED 2 Pin 100A Busbar Pin Type - 13 Ways

WCED 2 Pin 100A Busbar Pin Type – 13 Ways

19 In stock
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SKU: BBP2100
£8.40
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FuseBox RCBO

FuseBox RTA064530B 45A 30mA Type A RCBO

Delivery usually within 1-3 working days*
SKU: RTA064530B
£9.99
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WCED WME22/SP/15RCBO WCED Consumer Unit Kit with SPD and 15 RCBOs 1

WCED Consumer Unit Kit with SPD and 15 RCBOs

Delivery usually within 1-3 working days*
SKU: WME22/SP/15RCBO
£177.91
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Hager ADC416U Hager ADC416U RCBO 10kA C-16A 30mA Type A

Hager ADC416U RCBO 10kA C-16A 30mA Type A

7 In stock
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SKU: ADC416U
£35.76
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Hager VML110 10 Way RCBO Consumer Unit

Hager VML110 10 Way RCBO Consumer Unit

1 In stock
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SKU: VML110
£43.39
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Hager VM04CB Hager VM04CB 25mmx30mm Closed Meter Tail Plate

Hager VM04CB 25mmx30mm Closed Meter Tail Plate

19 In stock
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SKU: VM04CB
£1.50
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Live Electrical CB132D Live Electrical CB132D 32A Curve D 10kA MCB 1Live Electrical CB132D Live Electrical CB132D 32A Curve D 10kA MCB 2

Live Electrical CB132D 32A Curve D 10kA MCB

20 In stock
More available within 1-3 working days*
SKU: CB132D
£2.95
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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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