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Circuit Protection

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SPD Surge Protection Devices

SPD Surge Protection Devices (107)

Hager MZN176 Locking Wire for Modular Products

Hager MZN176 Locking Wire for Modular Products

Delivery usually within 1-3 working days*
SKU: MZN176
£6.15
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Hager CZN006 Sealable Terminal Cover Set for RCCB (25-63A, 4M)

Hager CZN006 Sealable Terminal Cover Set for RCCB (25-63A, 4M)

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SKU: CZN006
£4.85
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Hager MZN130 Terminal Cover 1P (Pack of 4)

Hager MZN130 Terminal Cover 1P

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SKU: MZN130
£18.62
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Hager L14700 Spare Cartridge Fuses Box (Pack of 10)

Hager L14700 Spare Cartridge Fuses Box

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SKU: L14700
£7.55
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Hager KDN263B Insulated Busbar 2P 63A Fork 10mm² 57M - 1 Meter

Hager KDN263B Insulated Busbar 2P 63A Fork 10mm² 57M – 1 Meter

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SKU: KDN263B
£39.90
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Hager KDN363B Insulated Busbar 3P 63A Fork 10mm² 57M

Hager KDN363B Insulated Busbar 3P 63A Fork 10mm² 57M

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SKU: KDN363B
£56.76
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Hager KDN463B Insulated Busbar 4P 63A Fork 10mm² 57M - 1 Meter

Hager KDN463B Insulated Busbar 4P 63A Fork 10mm² 57M – 1 Meter

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SKU: KDN463B
£76.60
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Hager KZ023A End Caps for Busbars (Pack of 10)

Hager KZ023A End Caps for 2P and 3P Busbars (Pack of 10)

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SKU: KZ023A
£6.10
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Hager KZN021 End Cap for Busbar 1P

Hager KZN021 End Cap for Busbar 1P

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SKU: KZN021
£2.05
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Niglon CS204P 20A 440V IP65 Changeover Switch

Niglon CS204P 20A 440V IP65 Insulated Changeover Switch

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SKU: CS204P
£36.99
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Niglon CS634P 63A 440V IP65 Insulated Changeover Switch

Niglon CS634P 63A 440V IP65 Insulated Changeover Switch

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SKU: CS634P
£119.42
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Niglon CS804P 80A 440V IP65 Enclosed Manual 4 Pole Changeover Switch

Niglon CS804P 80A 440V IP65 Enclosed Manual 4 Pole Changeover Switch

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SKU: CS804P
£148.64
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Niglon MS1250MC 1250A 690V IP65 Mild Steel Enclosed Manual 4 Pole Changeover Switch

Niglon MS1250MC 1250A 690V IP65 Mild Steel Enclosed Manual 4 Pole Changeover Switch

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SKU: MS1250MC
£2,812.30
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Niglon EDB10D-8 800A 10-Way Earthing Busbar with Link

Niglon EDB10D-8 800A 10-Way Earthing Busbar with Link

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SKU: EDB10D-8
£134.50
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Niglon SP12S-1PN 50kA Type 1+2 Surge Protection Device

Niglon SP12S-1PN 50kA Type 1+2 Surge Protection Device

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SKU: SP12S-1PN
£139.26
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Niglon SP12S-3PN 50kA Type 1+2 Surge Protection Device

Niglon SP12S-3PN 50kA Type 1+2 Surge Protection Device

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SKU: SP12S-3PN
£386.68
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Niglon SP23S-1PN 40kA Type 2 Surge Protection Device

Niglon SP23S-1PN 40kA Type 2 Surge Protection Device

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SKU: SP23S-1PN
£41.91
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Niglon SP23S-1PN 40kA Type 2 Surge Protection Device

Niglon SP23S-1PN/C40KA 40kA Type 2 Surge Protection Device

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SKU: SP23S-1PN/C40KA
£31.10
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Niglon SP23S-3PN/40KA 40kA Type 2 Surge Protection Device

Niglon SP23S-3PN/40KA 40kA Type 2 Surge Protection Device

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SKU: SP23S-3PN/40KA
£83.24
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Niglon SP23S-3PN/C40KA 40kA Type 2 Surge Protection Device

Niglon SP23S-3PN/C40KA 40kA Type 2 Surge Protection Device

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SKU: SP23S-3PN/C40KA
£79.78
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Showing 1541–1560 of 1808 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.

 

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