VAT:
Wishlist 0
Quotes 0
Electrical4less Logo
0
Electrical4less Reviews4.9 Based on 1612 reviews
UK Mainland Free Delivery £100 + VAT
30 Day Return Policy
Next Day Delivery Cut Off Time 3PM

Circuit Protection

Circuit Protection by Brand

Circuit Protection by Brand (1941)

Consumer Units

Consumer Units (477)

Circuit Protection Devices

Circuit Protection Devices (1068)

EV Circuit Protection

EV Circuit Protection (109)

SPD Surge Protection Devices

SPD Surge Protection Devices (124)

Three Phase Distribution Boards

Three Phase Distribution Boards (93)

Switch Fuses - Isolators

Switch Fuses - Isolators (176)

Switch Gear

Switch Gear (266)

Street Lighting Circuit Protection

Street Lighting Circuit Protection (13)

Showing 1721–1740 of 2370 results

Live Electrical CZ4125C 4P 125A MCB 10kA Curve C

Live Electrical | CZ4125C | 10kA | Curve C | 4 Pole Bi-Directional MCB | 125A
Out of Stock
This item cannot be back-ordered
SKU: CZ4125C
£27.68
Read more
Live Electrical MDAC4P20/24V 4 Pole 20A 4NO AC Contactor/24V DC Coil

Live Electrical MDAC4P20/24V 4 Pole 20A 4NO AC Contactor/24V DC Coil
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: MDAC4P20/24V
£14.10
Live Electrical MDAC4P25/24V 4 Pole 25A 4NO AC Contactor/24V DC Coil

Live Electrical MDAC4P25/24V – 4 Pole 25A 4NO 24V DC Coil Modular Contactor
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: MDAC4P25/24V
£14.80
Live Electrical LS-MB04 4 Module LSMC Mounting Bracket

Live Electrical LS-MB04 4 Module LSMC Mounting Bracket
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: LS-MB04
£6.48
Live Electrical LS-MB06 6 Module LSMC Mounting Bracket

Live Electrical LS-MB06 6 Module LSMC Mounting Bracket
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: LS-MB06
£6.80
Live Electrical LS-MB22 22 Module LSMC Mounting Bracket

Live Electrical LS-MB22 22 Module LSMC Mounting Bracket
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: LS-MB22
£12.73
Live Electrical LSMC16 16 Module Metal Enclosure

Live Electrical LSMC16 16 Module Metal Enclosure
2 In Stock
More available within:
Usually 1 - 3 Working Days
Read More
SKU: LSMC16
£36.20
Live Electrical FMC10 10 Module Flush Mounted Metal Enclosure

Live Electrical FMC10 10 Module Flush Mounted Metal Enclosure
2 In Stock
More available within:
Usually 1 - 3 Working Days
Read More
SKU: FMC10
£34.30
Live Electrical FMC22 22 Module Flush Mounted Metal Enclosure

Live Electrical FMC22 22 Module Flush Mounted Metal Enclosure
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: FMC22
£98.23
WCED WKC340B 10kA 3 Pole MCB Curve B 40A

WCED | WKC340B | 10kA | Curve B | 3 Pole Bi-Directional MCB | 40A
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: WKC340B
£8.61
WCED WKC363B 10kA 3 Pole MCB Curve B 63A

WCED | WKC363B | 10kA | Curve B | 3 Pole Bi-Directional MCB | 63A
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: WKC363B
£8.61
WCED WFD106B-030 Bi-Directional Type A 30mA B Curve 6A AFDD

WCED WFD106B-030 Bi-Directional Type A 30mA B Curve 6A AFDD
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: WFD106B-030
Quantity Discount
Quantity Price
1 - 2 £61.99
3+ £59.51
5+ £57.65
£61.99
WCED WFD110B-030 Bi-Directional Type A 30mA B Curve 10A AFDD

WCED WFD110B-030 Bi-Directional Type A 30mA B Curve 10A AFDD
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: WFD110B-030
Quantity Discount
Quantity Price
1 - 2 £61.99
3+ £59.51
5+ £57.65
£61.99
WCED WFD140B-030 Bi-Directional Type A 30mA B Curve 40A AFDD

WCED WFD140B-030 Bi-Directional Type A 30mA B Curve 40A AFDD
Available to Order
Estimated Lead Time:
Usually 1 - 3 Working Days
Read More
SKU: WFD140B-030
Quantity Discount
Quantity Price
1 - 2 £61.99
3+ £59.51
5+ £57.65
£61.99
Hager CZ001 Auxiliary Contact for RCCB 2(1C+1O) 6A 240V AC

Hager CZ001 Auxiliary Contact for RCCB 2(1C+1O) 6A 240V AC
Available to Order
Estimated Lead Time:
Usually 3 - 4 Working Days
Read More
SKU: CZ001
£28.44
Hager LZ060 Heat Dissipation Insert

Hager LZ060 Heat Dissipation Insert
Available to Order
Estimated Lead Time:
Usually 3 - 4 Working Days
Read More
SKU: LZ060
£7.32
Hager MZ201 Auxiliary Contact 1C+1O 6A 240V AC

Hager MZ201 Auxiliary Contact 1C+1O 6A 240V AC
Available to Order
Estimated Lead Time:
Usually 3 - 4 Working Days
Read More
SKU: MZ201
£42.88
Hager MZ202 Alarm Contact 1C+1O 6A 240V AC

Hager MZ202 Alarm Contact 1C+1O 6A 240V AC
Available to Order
Estimated Lead Time:
Usually 3 - 4 Working Days
Read More
SKU: MZ202
£58.02
Hager MZ204 Shunt Trip 24-48V AC / 12-48V DC

Hager MZ204 Shunt Trip 24-48V AC / 12-48V DC
Available to Order
Estimated Lead Time:
Usually 3 - 4 Working Days
Read More
SKU: MZ204
£42.88
Hager MZN121 Inter-Pole Barrier Set for MCB (1 Set of 3)

Hager MZN121 Inter-Pole Barrier Set for MCB (1 Set of 3)
Available to Order
Estimated Lead Time:
Usually 3 - 4 Working Days
Read More
SKU: MZN121
£28.44

Showing 1721–1740 of 2370 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.

Thousands of products in stock ready for next day delivery. Friendly and reliable service, competitive prices.

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.

 






© 2026 Electrical4less
We accept Visa We accept Mastercard We accept Maestro We accept PayPal We use Amazon Pay We use Apple Pay We use Google Pay
Next Day Delivery

Cut-Off Time and Order Information
To ensure your order qualifies for next day delivery, please place your order by 3:00 PM. This is subject to all items being available on the shelf at the time of your order. For orders where the total value exceeds £200 + VAT (double our standard carriage-paid order value of £100 + VAT), we are happy to split the delivery into two shipments if some items are needed urgently and others are not immediately available. If you have any questions or need further assistance, feel free to reach out to us via WhatsApp for live support. We’re here to help!

In Stock Delivery Policy

Free Next-Day Delivery Over £100 + VAT:
Orders above £100 + VAT qualify for free next-day delivery via DPD for in-stock items. While we strive for timely dispatch, we recommend placing orders early to avoid potential delays. Once dispatched, unexpected issues may arise despite the courier’s efforts.

Orders Below £200 + VAT:
To keep costs manageable, we dispatch your order once all items are ready, including products with longer lead times.

Need items faster? You can pay for an additional delivery service to receive in-stock items sooner. Simply email us with your order details, and we’ll send you a payment link for the extra delivery cost.

Orders Above £200 + VAT:
For larger orders, we can split delivery at no extra cost. In-stock items will be sent immediately, with the remaining items dispatched once available.

Supplier Lead Time & Availability

This item may be sourced from our supplier before dispatch.
The lead time shown is an estimate only and is based on the usual supplier timeframe. It is subject to supplier availability and is not a guaranteed delivery date.
We do not have a live supplier stock feed, so supplier stock can change without notice.
Delivery timers and courier estimates apply once the item is available for dispatch.
If the item is unavailable, we will contact you with the available options, including waiting for stock, choosing an alternative product, cancellation, or a refund for the unavailable item.
This does not affect your statutory rights.

Didn't find what you're looking for?

No problem — message us directly on WhatsApp and we’ll help you out.

We usually respond within minutes during working hours.

Cookie Preferences
We use cookies to enhance your browsing experience, serve personalised content, and analyse our traffic. By clicking "Accept All", you consent to our use of cookies. To find out more about how we use cookies please view our Privacy Policy.

Cookie Preferences

We use cookies to help you navigate the site and use its features. Below you will find details about each cookie category.

Cookies marked as "Necessary" are stored in your browser and are required for the site to function properly.

We also use third-party cookies to analyse site usage, remember your preferences, and show you relevant content and ads. These are only stored with your consent.

You can enable or disable optional cookies below. Turning some off may affect how the site works for you.

Necessary Always Active

Necessary cookies are needed for core site features, such as secure login and saving your cookie preferences. They do not store personal data.