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Circuit Protection

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SPD Surge Protection Devices

SPD Surge Protection Devices (109)

Live Electrical CB140C Live Electrical CB140C 40A Curve C 10kA MCB 1Live Electrical CB140C Live Electrical CB140C 40A Curve C 10kA MCB 2

Live Electrical CB140C 40A Curve C 10kA MCB

21 In stock
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SKU: CB140C
£2.95
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Fusebox F100GRA Garage Consumer Unit 63A 1FuseBox F100GRA Fusebox F100GRA Garage Consumer Unit 63A 2

Fusebox F100GRA Garage 63A RCD Consumer Unit

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SKU: F100GRA
£28.42
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Live Electrical TIME16S Live Electrical Single Module Digital Timer

Live Electrical Single Module Digital Timer

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SKU: TIME16S
£24.90
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WCED WMEPME06/C40 PME Fault Detection Unit 6 Mod c/w C40 RCBO /4P63A contactor & PME Relays 1WCED WMEPME06/C40 PME Fault Detection Unit 6 Mod c/w C40 RCBO /4P63A contactor & PME Relays 2

PME / PEN Fault Detection Unit 6 Mod c/w C40 RCBO /4P63A contactor & PME Relays

2 In stock
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SKU: WMEPME06/C40
£91.50

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Live Electrical CB306B Live Electrical CB306B 3 Pole 6A B Curve 10kA MCB 1Live Electrical CB306B Live Electrical CB306B 3 Pole 6A B Curve 10kA MCB 2

Live Electrical CB306B 3 Pole 6A B Curve 10kA MCB

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SKU: CB306B
£9.99
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Live Electrical CB316B Live Electrical CB316B 3 Pole 16A B Curve 10kA MCB 1Live Electrical CB316B Live Electrical CB316B 3 Pole 16A B Curve 10kA MCB 2

Live Electrical CB316B 3 Pole 16A B Curve 10kA MCB

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SKU: CB316B
£9.99
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WCED WKB4100C WCED 100A C Curve 4 Pole MCB 10kA 1WCED WKB4100C WCED 100A C Curve 4 Pole MCB 10kA 2

WCED 100A C Curve 4 Pole MCB 10kA

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SKU: WKB4100C
£15.99

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WCED WMEPME06/C32 PME Fault Detection Unit 6 Mod c/w C32 RCBO /4P63A contactor & PME Relays

PME / PEN Fault Detection Unit 6 Mod c/w C32 RCBO /4P63A Contactor & PME Relays

1 In stock
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SKU: WMEPME06/C32
£91.50

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FuseBox MT10C402 FuseBox MT10C402 40A Double Pole 10kA C Curve MCB

FuseBox MT10C402 40A Double Pole 10kA C Curve MCB

13 In stock
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SKU: MT10C402
£6.68
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FuseBox MT06B101 FuseBox MT06B101 10A MCB Curve B 1

FuseBox MT06B101 10A MCB Curve B

23 In stock
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SKU: MT06B101
£1.95
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PME / PEN Fault Detection IP65 Unit 6 Mod c/w C40 RCBO /4P63A Contactor & PME Relays WCED WPEPME08/C40 PME Fault Detection IP65 Unit 6 Mod c/w C40 RCBO /4P63A contactor & PME Relays 4

PME / PEN Fault Detection IP65 Unit 6 Mod c/w C40 RCBO /4P63A Contactor & PME Relays

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SKU: WPEPME08/C40
£79.50

2-£77.91£1.59£79.50
3-£77.12£2.39£79.50
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WARB5100C/PME40RSP 3 Phase PME Fault Detection Unit SKU: WARB5100C/PME40RSP

WARB5100C/PME40RSP 3 Phase PME Fault Detection Unit

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SKU: WARB5100C/PME40RSP
£110.25

2-£108.05£2.21£110.25
3-£106.94£3.31£110.25
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Hager ADA106U Type A RCBO

Hager ADA106U RCBO 10kA B-6A 30mA Type A

10 In stock
This item cannot be back-ordered
SKU: ADA106U
£30.99
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Live Electrical TPN04-125 Live Electrical TPN04-125 125A 4 Way TPN Distribution Board 1Live Electrical TPN04-125 Live Electrical TPN04-125 125A 4 Way TPN Distribution Board 2

Live Electrical TPN04-125 125A 4 Way TPN Distribution Board

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SKU: TPN04-125
£99.90
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FuseBox MT06C061 FuseBox MT06C061 6A MCB Curve C 1

FuseBox MT06C061 6A MCB Curve C

22 In stock
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£1.95
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WCED WHA865 WCED 8 Way Empty Plastic Enclosure 1WCED WHA865 WCED 8 Way Empty Plastic Enclosure 2

WCED 8 Way Empty Plastic Enclosure

3 In stock
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SKU: WHA865
£13.07

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FuseBox AREG FuseBox AREG Rear Entry Push-In Cable Gland

FuseBox AREG Rear Entry Push-In Cable Gland

71 In stock
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SKU: AREG
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Live Electrical 7 Way SPD Metal Consumer Unit Kit with 5 RCBOs Live Electrical 7 Way SPD Metal Consumer Unit Kit with 5 RCBOs

Live Electrical 7 Way SPD Metal Consumer Unit Kit with 5 RCBOs

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SKU: LSMC10M-SP/5RCBO
£85.37
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Hager KRN190 Neutral Connecting Block 100A

Hager KRN190 Neutral Connecting Block 100A

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SKU: KRN190
£10.09
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Live Electrical LEVB440-MS 4 way Metal Enclosure Type A 40A Double Pole RCBO and DP 100A Main Switch 1Live Electrical LEVB440-MS 4 way Metal Enclosure Type A 40A Double Pole RCBO and DP 100A Main Switch 2

4 way Metal Enclosure Type A 40A Double Pole RCBO and DP 100A Main Switch

1 In stock
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SKU: LEVB440-MS
£31.99 £27.90
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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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