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Circuit Protection

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SPD Surge Protection Devices (109)

Live Electrical SPC100 Live Electrical Single Pole 100A Copper Busbar 1m 16mm² 54 Pin 1

Live Electrical Single Pole 100A Copper Busbar 1m 16mm² 54 Pin

20 In stock
More available within 1-3 working days*
SKU: SPC100
£9.60
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Live Electrical MCS125A Live Electrical Metal 125A Changeover Switch Box

Live Electrical MCS125A Metal 125A Changeover Switch

1 In stock
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SKU: MCS125A
£34.50
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FuseBox RTAMC06 FuseBox RTAMC06 6A Mini Type A RCBO 1

FuseBox RTAMC06 6A Mini Type A RCBO

83 In stock
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SKU: RTAMC06
£13.50
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Live Electrical CB110B Live Electrical CB110B 10A Curve B 10kA MCB 1Live Electrical CB110B Live Electrical CB110B 10A Curve B 10kA MCB 2

Live Electrical CB110B 10A Curve B 10kA MCB

4 In stock
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SKU: CB110B
£2.95
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WCED WRB132C-030 WCED Type A High Immunity Curve C 32A 30mA RCBO 1WCED WRB132C-030 WCED Type A High Immunity Curve C 32A 30mA RCBO 2

WCED Type A High Immunity Curve C 32A 30mA RCBO

22 In stock
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SKU: WRB132C-030
£9.99
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WCED WAC4P40NC WCED WAC4P40NC 4 Pole 40A Normally Closed AC Contactor 1WCED WAC4P40NC WCED WAC4P40NC 4 Pole 40A Normally Closed AC Contactor 2

WCED WAC4P40NC 4 Pole 40A Normally Closed AC Contactor

Delivery usually within 1-3 working days*
SKU: WAC4P40NC
£13.50

3-£13.16£0.34£13.50
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10-£12.49£1.01£13.50
20-£12.15£1.35£13.50
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Live Electrical MAC2P20 Live Electrical MAC2P20 20A Modular AC Contactor 2 Pole NO 1Live Electrical MAC2P20 Live Electrical MAC2P20 20A Modular AC Contactor 2 Pole NO 2

Live Electrical MAC2P20 20A Modular AC Contactor 2 Pole NO

10 In stock
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SKU: MAC2P20
£6.24
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Live Electrical CB120B Live Electrical CB120B 20A Curve B 10kA MCB 1Live Electrical CB120B Live Electrical CB120B 20A Curve B 10kA MCB 2

Live Electrical CB120B 20A Curve B 10kA MCB

5 In stock
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SKU: CB120B
£2.95
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FuseBox RTA102030B FuseBox RTA102030B 20A 30mA 10kA B Curve Type A RCBO

FuseBox RTA102030B 20A 30mA 10kA B Curve Type A RCBO

20 In stock
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SKU: RTA102030B
£17.44
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WCED WMCUSP463C 3 Phase SPD with 63A Curve C 4 Pole MCB

WCED WMCUSP463C 3 Phase SPD with 63A Curve C 4 Pole MCB

1 In stock
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SKU: WMCUSP463C
£59.90

3-£56.91£3.00£59.90
5-£55.41£4.49£59.90
10-£53.91£5.99£59.90
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WCED WRCUSP440C 4 Pole SPD + 4 Pole 40A C Curve Type A RCBO with Metal Enclosure

WCED WRCUSP440C 4 Pole SPD + 4 Pole 40A C Curve Type A RCBO with Metal Enclosure

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SKU: WRCUSP440C
£80.25

3-£76.24£4.01£80.25
5-£74.23£6.02£80.25
10-£72.23£8.03£80.25
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Live Electrical TPN06-125S Live Electrical 125 Amp 6 Way TPN Distribution Board with SPD 1Live Electrical TPN06-125S Live Electrical 125 Amp 6 Way TPN Distribution Board with SPD 2

Live Electrical TPN06-125S 125 Amp 6 Way TPN Distribution Board with SPD

4 In stock
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SKU: TPN06-125S
£159.00
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WCED WKB106B WCED 1 Pole 6A B Curve 10 kA MCB 1WCED WKB106B WCED 1 Pole 6A B Curve 10 kA MCB 2

WCED 1 Pole 6A Curve B 10kA MCB

Delivery usually within 1-3 working days*
SKU: WKB106B
£3.35

5-£3.22£0.13£3.35
10-£3.13£0.22£3.35
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Live Electrical PEN4100 100A 4 Pole Mains Supply Isolator and Enclosure

Live Electrical PEN4100 100A 4 Pole Mains Supply Isolator and Enclosure

8 In stock
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SKU: PEN4100
£12.63
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FuseBox RTAMB16BD Bi-Directional Mini RCBO 16A B Curve 30mA Type A

FuseBox RTAMB16BD Bi-Directional Mini RCBO 16A B Curve 30mA Type A

47 In stock
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SKU: RTAMB16BD
£14.95
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FuseBox F2007M FuseBox F2007M 7 Way RCBO Consumer Unit 1

FuseBox F2007M 7 Way RCBO Consumer Unit

10 In stock
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SKU: F2007M
£29.95
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WCED WPEPME08/SP/C40 PME Fault Detection IP65 Unit 8 Mod c/w C40 RCBO /4P63A Contactor SPD & PME Relays PME / PEN Fault Detection IP65 Unit 8 Mod c/w C40 RCBO /4P63A Contactor SPD & PME Relays

PME / PEN Fault Detection IP65 Unit 8 Mod c/w C40 RCBO /4P63A Contactor SPD & PME Relays

1 In stock
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SKU: WPEPME08/SP/C40
£97.50

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3-£94.58£2.93£97.50
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WCED RCD For Consumer Units

WCED Double Pole Type A 30mA RCBO Curve B – 16A

1 In stock
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SKU: WER16B-030
£16.80
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Live Electrical 80A Fuse

Live Electrical 80A Fuse

22 In stock
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SKU: FU80A22
£1.99
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WCED WME6 WCED 6 Way Metal Enclosure 1WCED WME6 WCED 6 Way Metal Enclosure 2

WCED 6 Way Metal Enclosure

13 In stock
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SKU: WME6
£22.33

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10-£21.21£1.12£22.33
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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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