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    FuseBox Single Pole RCBOs Type A 6kA
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Related Articles

Residual Current Devices: A Crash Course in RCD's

Residual Current Devices - better known as RCD’s - are life-saving devices that protect against electrical shocks and fires. RCD’s are more sensitive and provide a higher level of protection than standard fuses or circuit breakers, with ratings measured in milliamps (mA) instead of amps (A). 

But with many different types of RCD available, selecting the correct model can be a confusing process.

With the help of our simple guide, we'll make it easy to choose the right model for the job. 

What Are RCD's?

In simple terms, RCD's monitor the electricity flowing through equipment and devices. They measure the current flowing in versus the current flowing out - and shut off the power if they detect an imbalance.

RCD's can be triggered by things such as faulty electrical equipment, water seeping into electrical connections, burnt-out sockets, or a person cutting into a live wire. 

RCD’s provide three types of safety protection: 

  • Fault protection: Any tripping current that relies on the resistance of the earth path (Regulations 411.4.204, 411.5.1, 531.2)
  • Additional protection: RCD's with a tripping current of less than 30 mA (Regulation 415.1)
  • Fire protection: A tripping current of less than 300 mA (Regulation 422.3.9)

What Are the Different Types of RCD's? 

While ‘RCD’ is often used to describe any device that provides residual current protection, there are three specific types: 

1) Fixed RCD’s are fitted into the consumer unit (fusebox), and provide the highest level of safety for one or multiple circuits. There are two types of fixed RCD's for use under varying standards: 

  • Residual Current Circuit Breaker (RCCB) without overload protection (BS EN 61008, BS 4293, BS EN 62423) 
  • Residual Current Circuit Breaker (RCBO) with overload protection (BS EN 61009) 

2) Socket-Outlet RCD’s feature built-in residual current devices and can be used instead of traditional socket-outlets (BS 7288) 

3) Portable RCD’s plug into any standard socket-outlet, allowing electrical appliances to be connected directly to the RCD (BS 7071) 

How Do You Select the Right RCD for the Job?

RCD's are required to comply with strict electrical and safety standards as identified in Regulation 531.3.3 of BS 7671:2018.

Where it is needed, equipment manufacturers must also specify (or make available) the correct type of RCD as a requirement under UK law. As it's not possible for electricians to know which equipment will be connected to an installation in the future, it's best practice to consult with clients to determine the most suitable RCD type.

Expert Electrical can also assist in selecting the correct type of RCD from a range of popular models and brands.

Need Expert Advice? We Can Help

RCD's are an essential component of electrical safety, and it's critical to use the right model for each type of installation. We supply a wide range of RCD's and RCBO's from many of the UK's leading brands, ensuring that you're always meeting the latest standards - and your customers stay safe.

One of the best and safest RCBO's on the market is the FuseBox mini RCBO which has Type A & AC protection in one. These are the perfect choice for use in FuseBox consumer units.

We encourage you to view our extensive selection of residual current devices, or if you need some expert advice, contact a member of our friendly and knowledgeable team.

AFDD Circuit Breakers

We are excited to introduce you to the world of AFDD devices, an innovative technology designed to provide maximum protection against electrical fires.

What is an AFDD?

An AFDD, or Arc Fault Detection Device, is an advanced device that repeatedly monitors the current flowing through a circuit. They identify any dangerous electrical arcs, which can lead to electrical fires if left unattended. They are also able to recognise the differences between a dangerous arc and a working arc, like the spark you see when you turn on a switch. Arc protection devices, such as the AFDD, are essential in protecting electrical circuits from the dangers of electrical arcs.

If a slight issue is detected, it reacts quickly, and cuts the power to help avoid an electrical fire. These faults can occur over time, from defective plugs and sockets, worn electrical contacts, damaged or frayed insulation around a cable, and many other reasons. AFDDs provide the additional safety beyond the traditional circuit breakers, and are seen as a small price to pay for keeping your family, employees and customers in safe hands.

Additional Safety

This state-of-the-art technology is critical for safety in both residential and industrial settings, offering an additional layer of protection that traditional circuit breakers or fuses may not provide. Certain locations are recommended to have an AFDD fitted. Sleeping accommodation like homes, hotels, buildings with a high risk due to the nature of its stored materials, locations with combustible constructional materials, thatched buildings and timber-framed buildings. Also, places that contain irreplaceable contents like museums and listed buildings.

Among the range of AFDD devices we offer, the AFDD RCBO stands out. An AFDD RCBO combines the functionality of a Residual Current Circuit Breaker with Overcurrent protection (RCBO) and an AFDD in one. This powerful combination ensures not only protection against earth leakage currents but also against potentially dangerous electrical arcs.

Expert Advice

At Expert Electrical, we understand the importance of safety in all electrical installations. That's why we are dedicated to providing a wide range of AFDD devices that cater to your specific needs. Our expert team are always on hand if you need to discuss the products, and we can help you decide on the most suitable.

As a trusted industrial electrical wholesaler, we strive to offer only the best arc fault detection devices on the market. We are always on hand to provide comprehensive information and expert advice to help you make the best choice for your safety and efficiency needs. We keep up to date with the latest products on the market, and keep our prices competitive.

Our AFDD devices are not just about protection; they're about peace of mind. Invest in the safety of your electrical installations with Expert Electrical's range of AFDD devices today. Discover a safer, more secure, and more efficient electrical experience with Expert Electrical. Explore our selection and find the right AFDD for your needs.