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Circuit Protection

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WCED WKB232C WCED 2 Pole 32A C Curve 10 kA MCB 1WCED WKB232C WCED 2 Pole 32A C Curve 10 kA MCB 2

WCED 2 Pole 32A C Curve 10 kA MCB

Delivery usually within 1-3 working days*
SKU: WKB232C
£6.99

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WCED WMEV225B WCED A-Type Electric Vehicle 2 Module Enclosure - 25A RCBO B Curve 1WCED WMEV225B WCED A-Type Electric Vehicle 2 Module Enclosure - 25A RCBO B Curve 2

WCED A-Type Electric Vehicle 2 Module Enclosure – 25A RCBO B Curve

2 In stock
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SKU: WMEV225B
£25.99

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WCED WMEV220C WCED A-Type Electric Vehicle 2 Module Enclosure - 20A RCBO C Curve 1WCED WMEV220C WCED A-Type Electric Vehicle 2 Module Enclosure - 20A RCBO C Curve 2

WCED A-Type Electric Vehicle 2 Module Enclosure – 20A RCBO C Curve

4 In stock
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SKU: WMEV220C
£25.99

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WCED WMEV225C WCED A-Type Electric Vehicle 2 Module Enclosure - 25A RCBO C Curve 1WCED WMEV225C WCED A-Type Electric Vehicle 2 Module Enclosure - 25A RCBO C Curve 2

WCED A-Type Electric Vehicle 2 Module Enclosure – 25A RCBO C Curve

4 In stock
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SKU: WMEV225C
£25.99

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WCED WKB350C WCED 3 Pole 50A C Curve 10 kA MCB 1WCED WKB350C WCED 3 Pole 50A C Curve 10 kA MCB 2

WCED 3 Pole 50A C Curve 10 kA MCB

4 In stock
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SKU: WKB350C
£9.99

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10-£9.34£0.65£9.99
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WCED WKB363C WCED 3 Pole 63A C Curve 10 kA MCB 1WCED WKB363C WCED 3 Pole 63A C Curve 10 kA MCB 2

WCED 3 Pole 63A C Curve 10 kA MCB

5 In stock
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SKU: WKB363C
£9.99

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Axiom SF20 Axiom SF20 20A TPN Switch Fuse with Fuses

Axiom SF20 20A TPN Switch Fuse with Fuses

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SKU: SF20
£64.50
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Axiom SF32 Axiom SF32 32A TPN Switch Fuse with Fuses

Axiom SF32 32A TPN Switch Fuse with Fuses

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SKU: SF32
£85.95
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WCED ATDR480-100 Time Delay Type A 4 Pole 80A 100mA RCD

WCED ATDR480-100 Time Delay Type A 4 Pole 80A 100mA RCD

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SKU: ATDR480-100
£34.88

2-£33.14£1.74£34.88
3-£32.26£2.62£34.88
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Axiom SD100 Axiom 100A Isolator TPN Grey Steel Enclosure

Axiom 100A Isolator TPN Grey Steel Enclosure

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SKU: SD100
£165.50
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Axiom RS254SE Axiom Rotary Isolator - 415V 25Amp 4P

Axiom RS254SE 4 Pole 25A Rotary Isolator – 415V

1 In stock
This item cannot be back-ordered
SKU: RS254SE
£20.95
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Axiom THR133.6 Axiom Thermal Overload Relay 2.8 - 4.2A

Profix THR133.6 Thermal Overload Relay 2.8 – 4.2A

1 In stock
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SKU: THR133.6
£12.50
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Hager ARR916U Hager ARR916U AFD with 30mA RCBO 16A Curve B Type A

Hager ARR916U AFD with 30mA RCBO 16A Curve B Type A

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SKU: ARR916U
£91.50
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Deligo GS1/10M-1 0.4mm-1.0mm Grommet PE Strip - 10 metres 1

0.4mm-1.0mm Grommet PE Strip – 10 metres

3 In stock
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SKU: GS1/10M-1
£5.60
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Europa ECLR01 Europa Latching Relay - 1P C/O 16A 12-240V AC/DC

Europa ECLR01 Latching Relay – 1P C/O 16A 12-240V AC/DC

Out of stock
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SKU: ECLR01
£17.35
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Europa ECPF05 Europa Phase Failure Relay - 10A 220-460V AC Adjustable Phase Loss / Sequence Under and Over Voltage

Europa ECPF05 Phase Failure Relay – 10A 220-460V AC Adjustable Phase Loss / Sequence Under and Over Voltage

1 In stock
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SKU: ECPF05
£25.62
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Europa GZS92-BLACK Europa 5 Pin Slimline Low Profile Relay - 1P CO 12A 300V AC

Europa GZS92-BLACK 5 Pin Slimline Low Profile Relay – 1P CO 12A 300V AC

1 In stock
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SKU: GZS92-BLACK
£3.55
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WCED WAC4P25NC/24 WCED 4 Pole 25A 24V Normally Closed AC Contactor 1

WCED 4 Pole 25A 24V NC Normally Closed AC Modular Contactor

4 In stock
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SKU: WAC4P25NC/24
£13.49

3-£13.15£0.34£13.49
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Wago 788-303 Wago 788 Relay Module with 1 Changeover Contact - 12V DC 16A 2.5 mm² Grey 1Wago 788-303 Wago 788 Relay Module with 1 Changeover Contact - 12V DC 16A 2.5 mm² Grey 2

Wago 788-303 Relay Module with 1 Changeover Contact – 12V DC 16A 2.5mm² Grey

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SKU: 788-303
£8.75
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FuseBox TPN16FB Fusebox TPN16FB 16 Way 125A Three Phase Board 1FuseBox TPN16FB Fusebox TPN16FB 16 Way 125A Three Phase Board 2

Fusebox TPN16FB 16 Way 125A Three Phase Board

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SKU: TPN16FB
£265.11
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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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