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Circuit Protection

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SPD Surge Protection Devices

SPD Surge Protection Devices (107)

Hager VC02SW 100A MeterBox Switch

Hager VC02SW 100A MeterBox Switch

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SKU: VC02SW
£31.16
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Hager KF81A Connection Terminal 1P Prong 1x25mm² - Pack of 1

Hager KF82A Connection Terminal 1P Prong 2 Cable 16mm² – Pack of 1

3 In stock
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SKU: KF82A
£9.56
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Hager EMN001 Stair Case Time Lag Switch

Hager EMN001 Stair Case Time Lag Switch

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SKU: EMN001
£79.73
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Hager EGN103 1 Channel Digital Time Switch Weekly Cycle

Hager EGN103 1 Channel Digital Time Switch Weekly Cycle

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SKU: EGN103
£94.10
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Hager EHN110 Daily Time Switch 1 Channel 3 Modules

Hager EHN110 Daily Time Switch 1 Channel 3 Modules

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SKU: EHN110
£145.27
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Hager EHN010 Daily Time Switch 1 Channel 1 Module

Hager EHN010 Daily Time Switch 1 Channel 1 Module

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SKU: EHN010
£122.65
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Hager EGN200 Multi-Function Time Switch 2 Channels Bluetooth

Hager EGN200 Multi-Function Time Switch 2 Channels Bluetooth

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SKU: EGN200
£165.60
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Hager EGN400 Multi-Function Time Switch 4 Channels Bluetooth

Hager EGN400 Multi-Function Time Switch 4 Channels Bluetooth

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SKU: EGN400
£303.37
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Hager CDB540E RCCB 1P+N 40A 30mA B Class

Hager CDB540E RCCB 1P+N 40A 30mA B Class

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SKU: CDB540E
£178.76
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Hager CDF540U RCCB 1P+N 40A 30mA F Class

Hager CDF540U RCCB 1P+N 40A 30mA F Class

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SKU: CDF540U
£94.93
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Hager CDF525U RCCB 1P+N 25A 30mA F Class

Hager CDF525U RCCB 1P+N 25A 30mA F Class

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SKU: CDF525U
£82.68
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Hager CFA263U RCCB 2P 63A 300mA A Class 

Hager CFA263U RCCB 2P 63A 300mA A Class 

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SKU: CFA263U
£100.21
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Hager CEA584U RCCB 1P+N 100A 100mA A Class

Hager CEA584U RCCB 1P+N 100A 100mA A Class

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SKU: CEA584U
£146.98
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Hager ESC225 - Contactor 25A, 2NO, 230V~50Hz

Hager ESC225 – Contactor 25A 2NO 230V 50Hz

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SKU: ESC225
£32.58
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Hager ESC125 - Contactor 25A, 1NO, 230V~50Hz

Hager ESC125 – Contactor 25A 1NO 230V 50Hz

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SKU: ESC125
£30.40
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Hager ESC425 – Contactor 25A 4NO 230V 50Hz

Hager ESC425 – Contactor 25A 4NO 230V 50Hz

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SKU: ESC425
£58.24
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Live Electrical 3P+N 6A B Curve 30mA Type A RCBO

Live Electrical 3P+N 6A B Curve 30mA Type A RCBO

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SKU: RTN306B-030N
£79.95
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Live Electrical 3P+N 25A B Curve 30mA Type A RCBO

Live Electrical 3P+N 25A B Curve 30mA Type A RCBO

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SKU: RTN325B-030N
£79.95
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Live Electrical 3P+N 40A B Curve 30mA Type A RCBO

Live Electrical 3P+N 40A B Curve 30mA Type A RCBO

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SKU: RTN340B-030N
£79.95
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Live Electrical 3P+N 50A B Curve 30mA Type A RCBO

Live Electrical 3P+N 50A B Curve 30mA Type A RCBO

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SKU: RTN350B-030N
£79.95
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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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