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Circuit Protection

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Fusebox FMS080

Fusebox FMS080 80A Main Switch Fused

Delivery usually within 1-3 working days*
SKU: FMS080
£14.95

10-£14.43£0.52£14.95
20-£13.68£1.27£14.95
40-£13.23£1.72£14.95
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WCED WAC2P40 WCED 2 Pole 40A 2NO AC Contactor

WCED 2 Pole 230V 40A NO Normally Open AC Modular Contactor

8 In stock
More available within 1-3 working days*
SKU: WAC2P40
£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 WAC4P25 WCED 4 Pole 25A 4NO AC Contactor 1

WCED 4 Pole 230/400V 25A NO Normally Open AC Modular Contactor

4 In stock
More available within 1-3 working days*
SKU: WAC4P25
£10.99

3-£10.72£0.27£10.99
5-£10.44£0.55£10.99
10-£10.17£0.82£10.99
20-£9.89£1.10£10.99
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WCED WKB120C WCED 1 Pole 20A C Curve 10 kA MCB 1WCED WKB120C WCED 1 Pole 20A C Curve 10 kA MCB 2

WCED 1 Pole 20A Curve C 10kA MCB

7 In stock
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SKU: WKB120C
£3.35

5-£3.22£0.13£3.35
10-£3.13£0.22£3.35
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WCED WKB332C WCED 3 Pole 32A C Curve 10 kA MCB 1WCED WKB332C WCED 3 Pole 32A C Curve 10 kA MCB 2

WCED 3 Pole 32A C Curve 10 kA MCB

Delivery usually within 1-3 working days*
SKU: WKB332C
£9.99

5-£9.59£0.40£9.99
10-£9.34£0.65£9.99
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WCED WKB432B WCED 4 Pole 32A B Curve 10 kA MCB 1WCED WKB432B WCED 4 Pole 32A B Curve 10 kA MCB 2

WCED 4 Pole 32A B Curve 10 kA MCB

5 In stock
More available within 1-3 working days*
SKU: WKB432B
£13.45

5-£12.91£0.54£13.45
10-£12.58£0.87£13.45
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Live Electrical RI20DC Live Electrical 4 Pole 20A DC Rotary Isolator Switch 1Live Electrical RI20DC Live Electrical 4 Pole 20A DC Rotary Isolator Switch 2

Live Electrical RI20DC 4 Pole 20A DC Rotary Isolator Switch

5 In stock
More available within 1-3 working days*
SKU: RI20DC
£20.99 £16.10
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WCED WER06C-030 WCED Double Pole Type A 30mA RCBO Curve C - 6A

WCED Double Pole Type A 30mA RCBO Curve C – 10A

1 In stock
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SKU: WER10C-030
£16.80
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Europa ECPF03 Europa Phase Failure Relay - 10A 220-460V AC Phase Loss / Sequence

Europa ECPF03 Phase Failure Relay – 10A 220-460V AC Phase Loss / Sequence

Out of stock
This item cannot be back-ordered
SKU: ECPF03
£15.43
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WCED WAC4P25/24 WCED 4 Pole 25A 24V Normally Open AC Contactor 1

WCED 4 Pole 25A 24V NO Normally Open AC Modular Contactor

17 In stock
More available within 1-3 working days*
SKU: WAC4P25/24
£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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WCED WAC4P63NC/24 WCED 4 Pole 63A 24V Normally Closed AC Contactor 1

WCED 4 Pole 63A 24V NC Normally Closed AC Modular Contactor

3 In stock
More available within 1-3 working days*
SKU: WAC4P63NC/24
£14.50

3-£14.14£0.36£14.50
5-£13.78£0.73£14.50
10-£13.41£1.09£14.50
20-£13.05£1.45£14.50
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FuseBox TPN12FB Fusebox TPN12FB 12 Way 125A Three Phase Board 1FuseBox TPN12FB Fusebox TPN12FB 12 Way 125A Three Phase Board 2

Fusebox TPN12FB 12 Way 125A Three Phase Board

Delivery usually within 1-3 working days*
SKU: TPN12FB
£225.32
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FuseBox MT10B251 FuseBox MT10B251 25A Single Pole 10kA B Curve MCB

FuseBox MT10B251 25A Single Pole 10kA B Curve MCB

21 In stock
More available within 1-3 working days*
SKU: MT10B251
£3.22
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FuseBox MT10B501 FuseBox MT10B501 50A Single Pole 10kA B Curve MCB

FuseBox MT10B501 50A Single Pole 10kA B Curve MCB

21 In stock
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SKU: MT10B501
£3.34
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FuseBox MT10C202 FuseBox MT10C202 20A Double Pole 10kA C Curve MCB

FuseBox MT10C202 20A Double Pole 10kA C Curve MCB

16 In stock
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SKU: MT10C202
£6.68
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FuseBox MT10B203 FuseBox MT10B203 20A Triple Pole 10kA B Curve MCB

FuseBox MT10B203 20A Triple Pole 10kA B Curve MCB

17 In stock
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SKU: MT10B203
£9.51
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FuseBox MT10D253 FuseBox MT10D253 25A Triple Pole 10kA D Curve MCB

FuseBox MT10D253 25A Triple Pole 10kA D Curve MCB

3 In stock
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SKU: MT10D253
£9.51
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FuseBox MT10D503 FuseBox MT10D503 50A Triple Pole 10kA D Curve MCB

FuseBox MT10D503 50A Triple Pole 10kA D Curve MCB

7 In stock
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SKU: MT10D503
£9.88
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FuseBox RTA102530C FuseBox RTA102530C 25A 10kA 30mA C Curve Type A RCBO

FuseBox RTA102530C 25A 10kA 30mA C Curve Type A RCBO

15 In stock
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SKU: RTA102530C
£17.44
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FuseBox ARCDLKTPN Fusebox ARCDLKTPN 4 Pole TPN RCD Link Fitting Kit

Fusebox ARCDLKTPN 4 Pole TPN RCD Link Fitting Kit

1 In stock
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SKU: ARCDLKTPN
£6.50
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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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