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Circuit Protection

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Hager MTN110 MCB 6kA B-10

17 In Stock
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SKU: MTN110
£2.45

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

4 In Stock
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SKU: MZN175
£7.55

Live Electrical | CB363B | 10kA | Curve B | 3 Pole Bi-Directional MCB | 63A

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SKU: CB363B
£9.07

WCED Fused Main Switch with 80 and 100A Fuses

19 In Stock
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SKU: WFIS100
£12.49

WCED Whitecliffe WSPD340 20kA/40kA 3 Pole Type 2 Surge Protection Device

1 In Stock
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SKU: WSPD340
£17.05

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

4 In Stock
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SKU: WER10B-030
£16.80

FuseBox MT10C101 10A Single Pole 10kA C Curve MCB

16 In Stock
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SKU: MT10C101
£3.22

FuseBox MT10C201 20A Single Pole 10kA C Curve MCB

14 In Stock
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SKU: MT10C201
£3.22

FuseBox MT10C322 32A Double Pole 10kA C Curve MCB

5 In Stock
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SKU: MT10C322
£6.68

Live Electrical ENC865 IP65 8 Way Plastic Enclosure

1 In Stock
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SKU: ENC865
£16.65

Niglon RCBO1-20/30SSAX 20A Curve B 30mA A Type RCBO

14 In Stock
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SKU: RCBO1-20/30SSAX
£11.12

Live Electrical Heat Pump SPD Consumer Unit with Type B RCD and C40 DP MCB

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SKU: LHP840MSB
£102.96

WCED | WSPV600 | 600V DC | Photovoltaic Surge Protection Device

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SKU: WSPV600
£13.66

Hager JK1PLATEM Spare Gland Plate 1.2mm

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SKU: JK1PLATEM
£25.97

Live Electrical RI425 4 Pole 25A Rotary Isolator Switch

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SKU: RI425
£10.80

WCED WAC2P100 – 2 Pole 100A 2NO 230V AC Modular Contactor

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SKU: WAC2P100
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£17.80

WCED Double Pole Type A 30mA RCBO Curve C – 16A

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SKU: WER16C-030
£15.09

FuseBox MT10C102 10A Double Pole 10kA C Curve MCB

18 In Stock
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SKU: MT10C102
£6.68

Live Electrical 15 Way SPD Metal Consumer Unit

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SKU: LSMC18M-SP
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G-ProBox Plus Consumer Unit Relocation Box

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SKU: GPROBOX-PLUS
£48.30

Showing 441–460 of 2375 results

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.