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Circuit Protection

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SPD Surge Protection Devices

SPD Surge Protection Devices (109)

Live Electrical CB110B Live Electrical CB110B 10A Curve B 10kA MCB 1Live Electrical CB110B Live Electrical CB110B 10A Curve B 10kA MCB 2

Live Electrical CB110B 10A Curve B 10kA MCB

16 In stock
More available within 1-3 working days*
SKU: CB110B
£2.95
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FuseBox MT06B201 FuseBox MT06B201 20A MCB Curve B 1

FuseBox MT06B201 20A MCB Curve B

27 In stock
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SKU: MT06B201
£1.95
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WCED WRCUSP440C 4 Pole SPD + 4 Pole 40A C Curve Type A RCBO with Metal Enclosure

WCED WRCUSP440C 4 Pole SPD + 4 Pole 40A C Curve Type A RCBO with Metal Enclosure

Delivery usually within 1-3 working days*
SKU: WRCUSP440C
£80.25

3-£76.24£4.01£80.25
5-£74.23£6.02£80.25
10-£72.23£8.03£80.25
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Live Electrical 80A Fuse

Live Electrical 80A Fuse

25 In stock
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SKU: FU80A22
£1.99
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WCED WKB416C WCED 4 Pole 16A C Curve 10 kA MCB 1WCED WKB416C WCED 4 Pole 16A C Curve 10 kA MCB 2

WCED 4 Pole 16A C Curve 10 kA MCB

3 In stock
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SKU: WKB416C
£13.45

5-£12.91£0.54£13.45
10-£12.58£0.87£13.45
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Live Electrical CB363C Live Electrical CB363C 3 Pole 63Amps C Curve 10kA MCB 1Live Electrical CB363C Live Electrical CB363C 3 Pole 63Amps C Curve 10kA MCB 2

Live Electrical CB363C 3 Pole 63Amps C Curve 10kA MCB

15 In stock
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SKU: CB363C
£10.99
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Live Electrical AFD32B Live Electrical AFDD Combined with Type A 30mA RCBO - 32A

Live Electrical AFDD Combined with Type A 30mA RCBO – 32A

1 In stock
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SKU: AFD32B
£81.50
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FuseBox MT06B401 FuseBox MT06B401 40A MCB Curve B 1

FuseBox MT06B401 40A MCB Curve B

14 In stock
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SKU: MT06B401
£1.95
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WCED WSPD240 Type 2 40kA Surge Arrestor (SPD) 1

Type 2 40kA Surge Arrestor (SPD)

5 In stock
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SKU: WSPD240
£17.16

3-£16.30£0.86£17.16
5-£15.87£1.29£17.16
10-£15.44£1.72£17.16
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Hager ADA310G Hager ADA310G RCBO 10A B Type 30mA 6kA

Hager ADA310G RCBO 10A B Type 30mA 6kA

8 In stock
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SKU: ADA310G
£12.99
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Live Electrical CB163C Live Electrical CB163C 63A Curve C 10kA MCB 1Live Electrical CB163C Live Electrical CB163C 63A Curve C 10kA MCB 2

Live Electrical CB163C 63A Curve C 10kA MCB

6 In stock
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SKU: CB163C
£2.95
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FuseBox EV32AX Fusebox EV32AX EV Charger Supply Unit 32A With SPD 1

Fusebox EV32AX EV Charger Supply Unit 32A With SPD

12 In stock
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SKU: EV32AX
£59.99
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Live Electrical EMCU2-A Live Electrical 2 Way Empty DIN Rail Metal Enclosure With Lid EMCU2-A

Live Electrical EMCU5-A5 Way Empty DIN Rail Metal Enclosure With Lid

6 In stock
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SKU: EMCU5-A
£10.45
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Live Electrical AMR140B-030 40A RCBO with 30mA Type A earth leakage protection and bi-directional functionality for solar and domestic use Live Electrical AMR140B-030 30mA Type A 40A 6kA B Curve Bi-Directional RCBO

Live Electrical AMR140B-030 30mA Type A 40A 6kA B Curve Bi-Directional RCBO

224 In stock
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SKU: AMR140B-030
£9.88

10-£8.89£0.99£9.88
20-£8.40£1.48£9.88
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FuseBox F2011M FuseBox F2011M 11 Way RCBO Consumer Unit 1

FuseBox F2011M 11 Way RCBO Consumer Unit

2 In stock
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SKU: F2011M
£32.90
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FuseBox IT1002 FuseBox IT1002 100A Double Main Switch 1FuseBox IT1002 FuseBox IT1002 100A Double Main Switch 2

FuseBox IT1002 100A Double Main Switch

1 In stock
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SKU: IT1002
£4.15
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WCED WAC4P32NC WCED WAC4P32NC 4 Pole 32A Normally Closed AC Modular Contactor 1

WCED WAC4P32NC 4 Pole 32A Normally Closed AC Modular Contactor

8 In stock
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SKU: WAC4P32NC
£13.50

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20-£12.15£1.35£13.50
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Live Electrical MMGU40B-SP 4-Way EV Consumer Unit with RCBO, SPD, and Busbar – White Metal Enclosure Live Electrical MMGU40B-SP EV Consumer Unit with RCBO, SPD & Busbar – 2P 40A B Curve Type A

Live Electrical MMGU40B-SP EV Consumer Unit with RCBO SPD & Busbar – 2P 40A B Curve Type A

18 In stock
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SKU: MMGU40B-SP
£30.99

3-£29.44£1.55£30.99
5-£28.67£2.32£30.99
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20-£26.34£4.65£30.99
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WCED WAC2P63 WCED 2 Pole 63A 2NO AC Contactor

WCED 2 Pole 230V 63A NO Normally Open AC Modular Contactor

10 In stock
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SKU: WAC2P63
£10.43

3-£10.17£0.26£10.43
5-£9.91£0.52£10.43
10-£9.65£0.78£10.43
20-£9.39£1.04£10.43
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WCED WKB463C WCED 4 Pole 63A C Curve 10 kA MCB 1WCED WKB463C WCED 4 Pole 63A C Curve 10 kA MCB 2

WCED 4 Pole 63A C Curve 10 kA MCB

Delivery usually within 1-3 working days*
SKU: WKB463C
£13.45

5-£12.91£0.54£13.45
10-£12.58£0.87£13.45
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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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