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Circuit Protection

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Live Electrical TPN14-125 Live Electrical TPN14-125 125A 14 Way TPN Distribution Board 1Live Electrical TPN14-125 Live Electrical TPN14-125 125A 14 Way TPN Distribution Board 2

Live Electrical TPN14-125 125A 14 Way TPN Distribution Board

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Live Electrical TPN08-250 250A Live Electrical 8 Way TPN Distribution Board 1Live Electrical TPN08-250 250A Live Electrical 8 Way TPN Distribution Board 2

250A Live Electrical 8 Way TPN Distribution Board

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Hager MTN150 MCB 6kA B-50

Hager MTN150 MCB 6kA B-50

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Live Electrical CB350D Live Electrical CB350D 3 Pole 50A D Curve 10kA MCB 1Live Electrical CB350D Live Electrical CB350D 3 Pole 50A D Curve 10kA MCB 2

Live Electrical CB350D 3 Pole 50A D Curve 10kA MCB

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Hager NBN306A Triple MCB

Hager NBN310A 3 Pole Type B MCB 10A 10kA

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Hager NBN306A Triple MCB

Hager NBN363A MCB 3 Pole Type B 63A 10kA

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Hager NCN306 MCB

Hager NCN340A 3 Pole MCB Type C 40A 10kA

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Hager NCN140A Hager NCN140A Single Pole Type C MCB 40A 10kA

Hager NCN140A Single Pole Type C MCB 40A 10kA

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Hager NBN120A Hager NBN120A Single Pole Type B MCB 20A 10kA

Hager NBN120A Single Pole Type B MCB 20A 10kA

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Hager VML120 20 Way RCBO Consumer Unit

Hager VML120RK 20 Way Main Switch Consumer Unit with Round Knockouts

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SKU: VML120RK
£66.80
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Live Electrical TPN24-125S Live Electrical 125 Amp 24 Way TPN Distribution Board with SPD 1Live Electrical TPN24-125S Live Electrical 125 Amp 24 Way TPN Distribution Board with SPD 2

Live Electrical TPN24-125S 125 Amp 24 Way TPN Distribution Board with SPD

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£339.90
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FuseBox AFDD064030B FuseBox AFDD064030B 40amp AFDD RCBO 30mA 1FuseBox AFDD064030B FuseBox AFDD064030B 40amp AFDD RCBO 30mA 3

FuseBox AFDD064030B 40amp AFDD RCBO 30mA

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Live Electrical 18 Edition 32 Way Dual Row SPD Consumer Unit Live Electrical 18 Edition 32 Way Dual Row SPD Consumer Unit

Live Electrical 18 Edition 32 Way Dual Row SPD Consumer Unit

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SKU: MCU36M-SP
£129.00
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Live Electrical EN5040/250 IP65 Metal Enclosure, 500x400x250mm, steel construction with RAL7035 epoxy powder coat, includes galvanised mounting plate and polyurethane foamed gasket for watertight sealing.Live Electrical EN5040/250 Live Electrical Metal Enclosure IP65 H:500 x W:400 x D:250mm 2

Live Electrical EN5040/250 IP65 Metal Enclosure H:500 x W:400 x D:250mm

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Live Electrical EN6050/250 Live Electrical Metal Enclosure IP65 H:600 x W:500 x D:250mm 1Live Electrical EN6050/250 Live Electrical Metal Enclosure IP65 H:600 x W:500 x D:250mm 2

Live Electrical EN6050/250 IP65 Metal Enclosure H:600 x W:500 x D:250mm

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Deligo GS3/10M 1.6mm-2.0mm Grommet PE Strip - 10 metres 1

1.6mm-2.0mm Grommet PE Strip – 10 metres

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Live Electrical CEV240B-030 2 Pole 40A 30mA Type B RCCB Live Electrical CEV240B-030 Live Electrical 2 Pole 40A Type B RCCB 2

Live Electrical CEV240B-030 2 Pole 40A 30mA Type B RCCB

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FuseBox INC634 FuseBox INC634 63A 4 Pole Contactor 230V 1

FuseBox INC634 63A 4 Pole 230V NO Normally Open AC Modular Contactor

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

WCED 16 Way Main Switch Consumer Unit

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WCED WME4 WCED 4 Way Metal Enclosure 1WCED WME4 WCED 4 Way Metal Enclosure 2

WCED 4 Way Metal Enclosure

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5-£18.54£0.48£19.02
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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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