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Circuit Protection

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SPD Surge Protection Devices

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Surge Devices SY12350KA4P/ENCM Surge Devices Type 1+2+3 50kA 3 Phase Lightning and Surge Arrester with Window Indication & 3P 63A MCB in IP65 Polycarbonate Enclosure

Surge Devices SY12350KA4P/ENCM Type 1+2+3 50kA 3 Phase Lightning and Surge Arrester with MCB in IP65 Enclosure

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SKU: SY12350KA4P/ENCM
£416.97
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Live Electrical LSMC6M-SP Live Electrical 3 Way SPD Metal Consumer Unit 1Live Electrical LSMC6M-SP Live Electrical 3 Way SPD Metal Consumer Unit 2

Live Electrical 3 Way SPD Metal Consumer Unit

4 In stock
More available within 1-3 working days*
SKU: LSMC6M-SP
£39.65
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Live Electrical SP1401P+N/2 Type 2 SPD Surge Protection Device

Live Electrical SP1401P+N/2 Type 2 SPD Surge Protection Device

2 In stock
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SKU: SP1401P+N/2
£12.03
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Hager ADC432U Hager ADC432U RCBO 10kA C-32A 30mA Type A

Hager ADC432U RCBO 10kA C-32A 30mA Type A

8 In stock
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SKU: ADC432U
£35.76
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Live Electrical AGU4-SR/W IP65 Metal SPD Garage/EV Consumer Unit with 40A RCBO – White

Live Electrical AGU4-SR/W IP65 Metal SPD Garage/EV Consumer Unit with 40A RCBO – White

10 In stock
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SKU: AGU4-SR/W
£52.92

3-£51.60£1.32£52.92
5-£50.27£2.65£52.92
10-£48.95£3.97£52.92
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FuseBox A65GRAGY Metal IP65 Garage Consumer Unit - Grey Metal IP65 Garage Consumer Unit with 63A 30mA RCD and 6A & 16A MCBs

FuseBox A65GRAGY Metal IP65 Garage Consumer Unit – Grey

4 In stock
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SKU: A65GRAGY
£60.00

3-£59.10£0.90£60.00
5-£58.35£1.65£60.00
10-£57.00£3.00£60.00
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FuseBox Bi-Directional Mini RCBO 06A C Curve 30mA Type A - Compact and Reliable Protection

FuseBox Bi-Directional Mini RCBO 25A C Curve 30mA Type A

7 In stock
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SKU: RTAMC25BD
£16.95
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Hager ADA940U 1P+N 6kA B-40A 30mA Type A

Hager ADA940U 1P+N 6kA B-40A 30mA Type A

3 In stock
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SKU: ADA940U
£26.28
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Live Electrical LSFS100 - 6 Way Metal 125A Fuse Switch Box with 100A Main Switch and Surge Protection

Live Electrical LSFS100/3F – 6 Way Metal 125A Fuse Switch Box with 100A Main Switch and Surge Protection

15 In stock
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SKU: LSFS100/3F
£58.50
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20A Three Phase RCBO - Three Module - 3P+N Pole B Curve 10kA Type A 30mA

Live Electrical 3P+N 20A B Curve 30mA Type A RCBO

3 In stock
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SKU: RTN320B-030N
£79.95
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Live Electrical 3P+N 6A C Curve 30mA Type A RCBO

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

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SKU: RTN306C-030N
£79.95
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Live Electrical AFD40B-10 10kA AFDD with RCBO Type A 40A

Live Electrical AFD40B-10 10kA AFDD with RCBO Type A 40A

Out of stock
This item cannot be back-ordered
SKU: AFD40B-10
£84.85
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Live Electrical RNA6C-030 RCBO A Type DP Bi-Directional 6A C Curve 30mA

Live Electrical RNA6C-030 RCBO A Type DP Bi-Directional 6A C Curve 30mA

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SKU: RNA6C-030
£16.06
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Live Electrical RNA40C-030 RCBO A Type DP Bi-Directional 40A C Curve 30mA

Live Electrical RNA40C-030 RCBO A Type DP Bi-Directional 40A C Curve 30mA

8 In stock
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SKU: RNA40C-030
£16.06
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Live Electrical CB263B 2 Pole MCB 63A B Curve

Live Electrical CB263B 2 Pole 10kA MCB 63A B Curve

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SKU: CB263B
£6.40
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Live Electrical FMC12M-SP 9 Way Flush SPD Metal Consumer Unit

Live Electrical FMC12M-SP 9 Way Flush SPD Metal Consumer Unit

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SKU: FMC12M-SP
£64.88
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Unicrimp QGT3B Grommet Strip Edge Roll - 5mm x 8mm x 3M (Black)

Unicrimp QGT3B Grommet Strip Edge Roll – 5mm x 8mm x 3m (Black)

5 In stock
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SKU: QGT3B
£2.63
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Live Electrical LSMC10/100 100A Main Switch 8 Way Consumer Unit

Live Electrical LSMC10/100 100A Main Switch 8 Way Consumer Unit

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SKU: LSMC10/100
£27.52
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Live Electrical LSMC14/100 100A Main Switch 12 Way Consumer Unit

Live Electrical LSMC14/100 100A Main Switch 12 Way Consumer Unit

2 In stock
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SKU: LSMC14/100
£32.64
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WCED WKC150C 10kA 1 Pole MCB Curve C 50A

WCED WKC150C 10kA 1 Pole MCB Curve C 50A

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SKU: WKC150C
£2.65

5-£2.54£0.11£2.65
10-£2.48£0.17£2.65
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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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