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Circuit Protection

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Hager VMLF120 Hager VMLF120 20 Way Main Switch Flush Consumer Unit

Hager VMLF120 20 Way Main Switch Flush Consumer Unit

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SKU: VMLF120
£91.54
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Hager JK112BA3 Hager JK112BA3 125A 12 Way TPN Board with Plain Door (Amendment 3)

Hager JK112BA3 125A 12 Way TPN Board with Plain Door (Amendment 3)

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SKU: JK112BA3
£224.16
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Hager JK11253S Hager JK11253S 125A 3 Pole Mains Switch Incomer Kit 1Hager JK11253S Hager JK11253S 125A 3 Pole Mains Switch Incomer Kit 2

Hager JK11253S 125A 3 Pole Mains Switch Incomer Kit

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SKU: JK11253S
£67.54
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Hager NBN306A Triple MCB

Hager NBN316A 3 Pole MCB Type B 16A 10kA

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SKU: NBN316A
£35.99
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Hager NCN132A Hager NCN132A Single Pole Type C MCB 32A 10kA

Hager NCN132A Single Pole Type C MCB 32A 10kA

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SKU: NCN132A
£8.94
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Hager NCN106A Hager NCN106A Single Pole Type C MCB 6A 10kA

Hager NCN106A Single Pole Type C MCB 6A 10kA

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SKU: NCN106A
£8.94
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Hager NBN140A Hager NBN140A Single Pole Type B MCB 40A 10kA

Hager NBN140A Single Pole Type B MCB 40A 10kA

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SKU: NBN140A
£8.94
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Hager VML110 10 Way RCBO Consumer Unit Hager VML110RK 10 Way Main Switch Consumer Unit with 100A switch disconnector, multiple knockouts, and Amendment 3 compliance for safe and efficient installations.

Hager VML110RK 10 Way Main Switch Consumer Unit with Round Knockouts

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SKU: VML110RK
£43.39
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FuseBox INC402 FuseBox INC402 Contactor DP 40A 230V 1

FuseBox INC402 NO Normally Open 2 Pole Modular Contactor 40A 230V

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SKU: INC402
£11.55
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Live Electrical EN4040/200 IP65 Metal Enclosure, 400x400x200mm, steel construction with RAL7035 epoxy powder coat, includes galvanised mounting plate and polyurethane foamed gasket for watertight sealing.Live Electrical EN4040/200 Live Electrical Metal Enclosure IP65 H:400 x W:400 x D:200mm 2

Live Electrical EN4040/200 IP65 Metal Enclosure H:400 x W:400 x D:200mm

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SKU: EN4040/200
£53.79
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Live Electrical WS18-32 Live Electrical Single Pole 32A Rail Mount Fuse Holder Without Fuse 1Live Electrical WS18-32 Live Electrical Single Pole 32A Rail Mount Fuse Holder Without Fuse 2

Live Electrical Single Pole 32A Rail Mount Fuse Holder Without Fuse

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SKU: WS18-32
£2.50
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Live Electrical RDA425-030 Live Electrical 4 Pole Type A 25A 30mA RCD

Live Electrical RDA425-030 4 Pole Type A 25A 30mA RCD

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SKU: RDA425-030
£22.50
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FuseBox F2030MDT Fusebox F2030MDT 30 Way Dual Tariff Consumer Unit 1

FuseBox F3032MDT 32 Way 2x100A Dual Tariff Consumer Unit

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SKU: F3032MDT
£147.10
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FuseBox F2044MX FuseBox F2044MX 44 Way RCBO Consumer Unit With SPD 1

FuseBox F2044MX 44 Way RCBO Consumer Unit With SPD

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SKU: F2044MX
£176.77
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WCED Metal Garage Unit - 63A Type A RCD 6A/32A B MCBs

WCED WMGU04/632 Metal Garage Consumer Unit – 63A Type A RCD 6A/32A B MCBs

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SKU: WMGU04/632
£25.09

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WCED WME12/MS100 WCED 10 Way Main Switch RCBO Consumer Unit

WCED 20 Way Main Switch Consumer Unit

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SKU: WME22/MS100
£44.75
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WCED WME22 WCED 22 Way Metal Enclosure 1WCED WME22 WCED 22 Way Metal Enclosure 2

WCED 22 Way Metal Enclosure

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SKU: WME22
£39.36

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WCED WMC163C WCED Miniature Circuit Breaker 6kA Curve C - 63A 1WCED WMC163C WCED Miniature Circuit Breaker 6kA Curve C - 63A 2

WCED Miniature Circuit Breaker 6kA Curve C – 63A

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£1.53
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WCED WMC116C WCED Miniature Circuit Breaker 6kA Curve C - 16A 1WCED WMC116C WCED Miniature Circuit Breaker 6kA Curve C - 16A 2

WCED Miniature Circuit Breaker 6kA Curve C – 16A

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WCED WMC106C WCED Miniature Circuit Breaker 6kA Curve C - 6A 1WCED WMC106C WCED Miniature Circuit Breaker 6kA Curve C - 6A 2

WCED Miniature Circuit Breaker 6kA Curve C – 6A

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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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