Jake Green, Head of Technical Engagement at Scolmore Group, briefly considers one aspect of selectivity as it relates to overcurrent protective devices (OCPD), and in particular circuit-breakers conforming to BS EN 60898. Selectivity is one element that designers must consider as part of the coordination requirement detailed in Regulation 536.3 (Fig 1). Selectivity is defined ...

The post Determining selectivity for circuit-breakers conforming to BS EN 60898 appeared first on Professional Electrician.

Are you involved directly with heat pump installations or expecting to deal with an existing installation? A better understanding of RCD requirements associated with HPs can save time and money for you and your customers, as Chaz Andrews, Technical Manager at Doepke UK, explains. ASHPs (air source heat pumps) contain large inverters in comparison to ...

The post 18th Edition RCD Requirements for Heat Pump Installations | Doepke appeared first on Professional Electrician.

In this article, originally written for the IET Wiring Matters publication, James Eade looks to dispel some of the myths surrounding the use of flexible cables in fixed installations. The content for this piece was inspired by a comment that was posted on the IET EngX Forum which stated: ‘Flexible cables are not permitted in ...

The post Mythbusting: The use of flexible cables in fixed installations appeared first on Professional Electrician.

Hager’s Technical Training Manager, Paul Chaffers, shares the importance of observing protective device terminal markings and discusses the requirements for disconnecting all live conductors, including the neutral conductor for certain applications. Usually, we consider the current flowing through a protective device to be in one direction only, i.e. from the distribution board to the load. ...

The post What are the requirements for disconnecting all live conductors? | Hager appeared first on Professional Electrician.

Q. My apprentice has completed his AM2S but I’ve not got the apprenticeship certificate yet. Why is this? There can often be confusion around which certificates NET issue directly and what is issued by other bodies. When your apprentice passes their AM2S this is the final piece of their apprenticeship training. They will receive two ...

The post The Training Ground: what certificates should apprentices get when they complete their AM2S? appeared first on Professional Electrician.

John Hayhurst, Electrical Tutor at City Skills SCC, provides a guide to navigating electrical reflections in circuits. In this article, I’m looking to challenge your grasp of electromagnetism and explore the intricate realm of electrical reflections in circuits. This guide aims to provide an introduction to the subject, with a special emphasis on incorporating the ...

The post How to navigate electrical reflections in circuits appeared first on Professional Electrician.

Need help with cracking those EICR codes? The technical team at NAPIT, with the help of the 18th Edition Codebreakers publication, answer your latest coding queries. Click on the photos for a closer look! IAIN NORMAN: WE WERE RECENTLY ASKED TO PROVIDE A 32 A SUPPLY FOR THE FIRST OF MANY SMALL SAUNAS TO BE ...

The post Codebreakers #76 appeared first on Professional Electrician.

Steve Humphreys, Technical Commercial Manager at NAPIT, throws light on the battle to use self-generated green energy. With the continuing rise in energy costs, consumers are looking at ways to mitigate against rising bills and recoup some benefits through renewable technologies. Solar PV systems have been on the market for many years with homes fitted ...

The post What are the benefits of Electrical Energy Storage Systems? | NAPIT appeared first on Professional Electrician.

Michael Coupland of Aico offers advice to ensure you’re not caught off-guard in the future. Even if you’re familiar with BS 7671 and the electrical wiring regulations, you might be missing a crucial detail lurking within its pages. This seemingly innocuous line tucked away at the back holds major implications for electricians – and your ...

The post Smoke alarm installations: The hidden requirement in BS 7671 | Aico appeared first on Professional Electrician.

Need help with cracking those EICR codes? The technical team at NAPIT, with the help of the 18th Edition Codebreakers publication, answer your latest coding queries. Click on the photos for a closer look! JOSH COOK: THESE ARE JUST A FEW FINDS FROM A TYPICAL WEEK ON THE JOB… During an EICR there are often ...

The post Codebreakers #75 appeared first on Professional Electrician.