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Circuit Protection

Showing 1601–1620 of 2375 results

Wago 788-515 Relay Module with 2 Changeover Contacts – 115V AC 8A 2.5mm² Grey

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Usually 3 - 5 Working Days
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SKU: 788-515
£10.07

Wago 288-437 Relay Module with Driven Contacts – 2 Changeover Contacts – 24V DC 5A 2.5mm²

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SKU: 288-437
£64.14

FuseBox TPN Modbus Meter Board 125A

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Usually 2 - 4 Working Days
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SKU: TPNMMB
£343.14

FuseBox MT10D101 10A Single Pole 10kA D Curve MCB

12 In Stock
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SKU: MT10D101
£3.22

FuseBox MT10D062 6A Double Pole 10kA D Curve MCB

6 In Stock
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SKU: MT10D062
£6.68

FuseBox MT10D252 25A Double Pole 10kA D Curve MCB

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SKU: MT10D252
£6.68

FuseBox MT10D632 63A Double Pole 10kA D Curve MCB

21 In Stock
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SKU: MT10D632
£6.95

FuseBox MT10B103 10A Triple Pole 10kA B Curve MCB

21 In Stock
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SKU: MT10B103
£9.51

FuseBox MT10D403 40A Triple Pole 10kA D Curve MCB

25 In Stock
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SKU: MT10D403
£9.51

Live Electrical | Metal Enclosure with SPD | 4P 20-40kA | For 250A TPN Boards

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Usually 2 - 3 Working Days
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SKU: TPN-250S
£144.24

Surge Devices 800912 50kA Type 1+2+3 Single Phase SPD with Window Indication

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Usually 3 - 4 Working Days
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SKU: 800912
£219.00

Surge Devices 10020/4 Industrial 50kA Type 1+2+3 Three Phase Surge Protection Device

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Usually 3 - 4 Working Days
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SKU: 10020/4
£306.00

Surge Devices 10020/2 Type 1+2+3 SPD for TN-S and TNC-S systems

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SKU: 10020/2
£153.00

Surge Devices 381649S Type 1+2+3 50kA Three Phase Lightning and Surge Arrester

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SKU: 381649S
£354.00

Surge Devices 10812/LED/ENC 50kA Type 1+2+3 Single Phase SPD with LED Indication in IP65 Enclosure

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Usually 3 - 4 Working Days
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SKU: 10812/LEDENC
£267.00

Surge Devices 10812/LED/ENCM 50kA Type 1+2+3 Single Phase SPD with LED Indication & 63A MCB

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Usually 3 - 4 Working Days
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SKU: 10812/LEDENCM
£273.00

Surge Devices 800914ENCM Type 1+2+3 SPD – 3-Phase Lightning Arrester in IP65 Enclosure with 63A MCB

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Usually 3 - 4 Working Days
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SKU: 800914ENCM
£483.00

Surge Devices 800912/ENC 50kA Type 1+2+3 Single Phase SPD in IP65 Enclosure

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Usually 3 - 4 Working Days
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SKU: 800912ENC
£243.00

Surge Devices 800912/ENCM 50kA Type 1+2+3 Single Phase SPD in IP65 Enclosure with MCB

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SKU: 800912ENCM
£249.00

Surge Devices 10020/4ENCM Industrial 50kA Type 1+2+3 Three Phase Surge Protection Kit with MCB & IP65 Enclosure

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Usually 3 - 4 Working Days
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SKU: 10020/4ENCM
£384.00

Showing 1601–1620 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.