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Circuit Protection

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Live Electrical MAC2P63 Live Electrical MAC2P63 63A Modular AC Contractor 2 Pole NO 1Live Electrical MAC2P63 Live Electrical MAC2P63 63A Modular AC Contractor 2 Pole NO 2

Live Electrical MAC2P63 63A Modular AC Contractor 2 Pole NO

10 In stock
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SKU: MAC2P63
£9.79
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FuseBox MT06C161 FuseBox MT06C161 16A MCB Curve C 1

FuseBox MT06C161 16A MCB Curve C

30 In stock
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SKU: MT06C161
£1.95
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FuseBox F2014DT Fusebox F2014DT 14 Way Dual Tariff Consumer Unit 1

Fusebox F2014DT 14 Way Dual Tariff Consumer Unit

4 In stock
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SKU: F2014DT
£53.70
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Live Electrical SC440 Live Electrical 4 Pole 20kA/40kA Type 2 Surge Protective Device

Live Electrical 4 Pole 20kA/40kA Type 2 Surge Protective Device

9 In stock
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SKU: SC440
£37.55
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Live Electrical LSMC14M-SP Live Electrical 11 Way SPD Metal Consumer Unit 1Live Electrical LSMC14M-SP Live Electrical 11 Way SPD Metal Consumer Unit 2

Live Electrical 11 Way SPD Metal Consumer Unit

9 In stock
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SKU: LSMC14M-SP
£46.12

2-£45.20£0.92£46.12
4-£44.74£1.38£46.12
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 Hager MZN175 Padlockable Locking Kit MCB, RCCB, RCBO (padlock not included)

 Hager MZN175 Padlockable Locking Kit MCB, RCCB, RCBO (padlock not included)

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SKU: MZN175
£7.90
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Live Electrical TPN06-125 Live Electrical TPN06-125 125A 6 Way TPN Distribution Board 1Live Electrical TPN06-125 Live Electrical TPN06-125 125A 6 Way TPN Distribution Board 2

Live Electrical TPN06-125 125A 6 Way TPN Distribution Board

2 In stock
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SKU: TPN06-125
£112.90
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Live Electrical CB106D Live Electrical CB106D 6A Curve D 10kA MCB 1Live Electrical CB106D Live Electrical CB106D 6A Curve D 10kA MCB 2

Live Electrical CB106D 6A Curve D 10kA MCB

20 In stock
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SKU: CB106D
£2.95
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Live Electrical RDA440-030 Live Electrical 4 Pole Type A 40A 30mA RCD

Live Electrical RDA440-030 4 Pole Type A 40A 30mA RCD

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SKU: RDA440-030
£22.50
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Live Electrical IS4N-20 Timeguard Weathersafe Rotary Isolator Switch – 4 Pole 20A

Timeguard IS4N-20 4 Pole 20A Rotary Isolator Switch

7 In stock
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SKU: IS4N-20
£10.90
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FuseBox ACCF Fusebox ACCF Tail Clamp

Fusebox ACCF Tail Clamp

13 In stock
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SKU: ACCF
£1.95
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FuseBox TPN07FBX Fusebox TPN07FBX 7 Way 125A Three Phase Board 1FuseBox TPN07FBX Fusebox TPN07FBX 7 Way 125A Three Phase Board 2

Fusebox TPN07FBX 7 Way 125A Three Phase Board

1 In stock
This item cannot be back-ordered
SKU: TPN07FBX
£219.40
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Live Electrical MMGU40C-SP 4-Way EV Consumer Unit with 40A C Curve RCBO, Surge Protection, and Busbar – White Metal Enclosure EV Consumer Unit - Front Straight Open

Live Electrical MMGU40C-SP EV Consumer Unit with RCBO SPD & Busbar – 2P 40A C Curve Type A

8 In stock
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SKU: MMGU40C-SP
£30.99

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20-£26.34£4.65£30.99
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WCED WMTP36-R40CSP WCED 3-Phase 36 Ways PME Protection Board 1WCED WMTP36-R40CSP WCED 3-Phase 36 Ways PME Protection Board 3

3-Phase PME / PEN Fault Detection Consumer Unit for 3 x 3 Phase EV Charges

Delivery usually within 1-3 working days*
SKU: WMTP36-R40CSP
£284.40

2-£278.71£5.69£284.40
3-£275.87£8.53£284.40
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WCED WME06/SP WCED 3 Way SPD Metal Consumer Unit

WCED 3 Way SPD Metal Consumer Unit

7 In stock
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SKU: WME06/SP
£37.01

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WCED WME18/SP WCED 15 Way SPD Metal Consumer Unit

WCED 15 Way SPD Metal Consumer Unit

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SKU: WME18/SP
£53.75

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FuseBox RTB630302M FuseBox RTB630302M 63A Double Pole Type B RCD

FuseBox RTB630302M 63A Double Pole Type B RCD

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SKU: RTB630302M
£114.00
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WCED WAC4P40 WCED 4 Pole 40A 4NO AC Contactor 1

WCED 4 Pole 230/400V 40A NO Normally Open AC Modular Contactor

9 In stock
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SKU: WAC4P40
£14.99

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WCED WMCUSP432B 3 Phase SPD with 32A Curve B 4 Pole MCB

WCED WMCUSP432B 3 Phase SPD with 32A Curve B 4 Pole MCB

Delivery usually within 1-3 working days*
SKU: WMCUSP432B
£59.90

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5-£55.41£4.49£59.90
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WCED RCD For Consumer Units

WCED Double Pole Type A 30mA RCBO Curve B – 20A

9 In stock
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SKU: WER20B-030
£16.80
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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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