What You Need To Know About SPDs

Gary Parker, ECA Technical Manager, presents a short history of surge protection devices and discusses where and when to use them. Since their invention in the 1970s (initially patented as the delightfully named Zap Trap), surge protection devices (SPDs) have become essential in many lightning protection systems (LPS). Nowadays, SPDs are used in electrical installation systems to protect against transient overvoltages (also called voltage spikes) that can damage electrical equipment and sensitive components. All electrical components are susceptible to surges, and these can be natural (from lightning) or man-made (from overloading or switching). The function of the modern SPD is threefold. They: provide equipotential bonding to the services, reducing the risk of flashovers when current is injected into the ground reduce transient energy entering into a facility from a direct or indirect flash to the service protect internal electrical and electronic equipment An easy way to remember these functions is to recall that SPDs protect equipment, whereas RCDs protect people. When and where to use them As mentioned above, SPDs are not new, and neither is the concept of lightning protection. The 18th Edition of the IET Wiring Regulations (BS 7671:2018), which has been in effect for over a year now, has highlighted some important points to consider regarding SPDs and their use in today’s world. But does it demand their use on all installations? While BS 7671 now has a much stronger focus on the use of SPDs, it would be wrong to say that some 27 million installations in the UK are suddenly at risk. First and foremost, a designer or installer should consider if protection against transient overvoltage is needed. Installations should be functional, useful and always safe. SPDs are not the be-all and end-all of safety, but any decision to use them should be based on thorough, fact-based risk assessment. 18th Edition considerations What the regulations say: Protection against overvoltages shall be provided where the consequences could result in serious injury to, or loss of, human life. Gary’s note: Where an overvoltage poses a risk to life, they must be fitted. However, hospitals have a lot of protection and supplies in place. It is not the case that simply all systems must have SPDs. What the regulations say: Protection against overvoltages shall be provided where the consequences could result in interruption of public services and/or damage to cultural heritage. Gary’s note: Safety critical or relevant parts of museums etc. would require protection. However, not all public services are critical. What the regulations say: Protection against overvoltages shall be provided where the consequences could result in interruption of commercial or industrial activity. Gary’s note: The risk is different in various commercial sites; some have a tolerable risk. What the regulations say: Protection against overvoltages shall be provided where the consequences could affect a large number of co-located individuals. Gary’s note: This is covered by the notes above. If in doubt, calculator out! While not all installations require SPDs, a risk assessment should always be considered. This involves a calculation based on the Calculated Risk Level. This requires knowledge of figures including environmental factor (fenv), risk assessment length in km (LP), and lightning ground flash density (Ng). If all the required data is at hand, the calculation is simple enough – ECA members can even use our handy SPD calculator to do so (simply visit eca.co.uk/spd on desktop or mobile). CRL = fenv / (LP x Ng) Exceptions to the Regs The Regulations also allow for SPDs to be omitted from a so-called single dwelling, where ‘The total value of an installation and the equipment therein does not justify such protection’. This does not mean that simply adding up the cost of equipment is the way to calculate the benefit of SPDs. A ‘single dwelling’ can be a one bedroom flat, a part of a tower block or a country mansion – the risks are highly variable and should be considered carefully in each case. Find out more For more information on SPDs, the 18th Edition and other technical guidance, visit eca.co.uk/technical.

Schneider Electric Specification Tool Surpasses 1,000 Creations

Following the launch of Schneider Electric's online specification tool for designers, specifiers and consulting engineers in 2019, the company is now reporting that over 1,000 specifications have been created with the tool. The free online tool aims to make the process of generating specification for tenders quicker, simpler and much easier. It provides a platform for users to create and store their specifications, and instantly access all the information they need on solutions and digital architectures. Available through the company’s specifier/consultant mySchneider Partner Portal, the platform allows users to create specifications from scratch or pre-existing templates. The platform provides simple functionality, allowing its users take product information from a vast library of industry solutions and quickly drop it into their specification templates. "The new tool brings M&E Design into the digital age," says Andrew Wakeley, Customer Channel Marketing Manager in the UK for Consultants/Specifiers at Schneider Electric. "Our platform seeks to streamline the process while also being educational. In design, speed is of the essence and the specification tool helps its users get their ideas out the door quickly while giving them back precious time to grow their business and learn. We’re delighted to have reached 1,000 specifications and we expect that number to grow exponentially in the coming years. To use the tool, register via Schneider Electric's dedicated portal: https://www.se.com/uk/en/partners/consultant-engineers/

Britain’s Top Tradesperson Featured in Screwfix Catalogue

The latest Screwfix catalogue features Britain’s Top Tradesperson, Darren McGhee, who's included to recommend an exclusive Milwaukee brushless twin pack priced at £249.99. The Screwfix exclusive, Milwaukee 18 M18 brushless twin pack includes a combi drill, impact driver, two 5.0Ah batteries and a carry case. The pack also includes Milwaukee’s RedLink intelligence system, which delivers advanced digital overload protection and enhances performance under load. Priced at £249.99, the system comes with a three-year warranty and an introductory saving of £80. Trusted by the trade since 1979, Screwfix continues to invest in its product ranges to support the needs of busy tradespeople, helping them to get jobs done quickly, affordably and right first time. The new catalogue offers quality products, from power tools and workwear to electrical and lighting. The ‘Trade Rated’ endorsement provides confidence and reassurance, having been independently tried and tested by Screwfix customers. Britain’s Top Tradesperson 2019, Darren McGhee, says, “It’s overwhelming to be the first winner of Britain’s Top Tradesperson to be featured in the Screwfix catalogue. Winning the competition has opened so many doors for me and given me opportunities that I couldn’t have dreamt of.” Matt Compton, Trading Director at Screwfix, adds, “This is an exciting catalogue release for us, with Darren on the front cover alongside the fantastic Milwaukee twin pack. Our latest catalogue has more new products to give our customers what they need, when they need it. Our trade-rated badge ensures our customers can be confident they’re getting the best each, and every time.” In addition to thousands of products and special offers from leading brands, the new Screwfix catalogue also features deals on everyday essentials, offered at low prices. To obtain a copy of the new catalogue, visit your local Screwfix store, head to Screwfix.com or call 03330 112 112.

Underfloor Heating Continues To Be Fast Growing Sector

The UK underfloor heating market continues to be one of the fastest growing sectors of the UK heating industry, accounting for around 7.7% share by value in 2019 according to the latest Underfloor Heating Market Report from AMA Research. The performance of the UK underfloor heating market in the last five years has been positive, reflecting buoyant activity within some sectors of the non-residential construction industry and relative stability in residential homebuilding and renovation.  The increasing focus on energy efficiency and the environment has supported demand for UFH systems. It is estimated that water-based UFH is around 25% more efficient than radiators when used with a condensing boiler and up to 40% more efficient when running from a heat pump. Another positive influence on the underfloor heating market is the growing number of plumbing & heating engineers which have been trained in the installation of UFH. Greater product awareness and knowledge amongst installers is likely to boost recommendations to customers. One effect of rising awareness of UFH and its benefits has been the rapid growth in online sales. Although end-users account for the bulk of online customers, an increasing number of installers are also purchasing UFH systems via this channel.   Consumer awareness of UFH is increasing, a factor which is likely to result in further penetration in domestic properties and hence market growth. This is being driven by the rising number of online retailers selling UFH systems, as well as efforts to stimulate the self-build and custom-build sectors. Product developments have made underfloor heating systems easier to install, broadening their appeal for the retrofit market. This has led to the emergence of systems (both water-based and electric) which can be laid over existing floors, thereby minimising disruption and speeding up installation. Market growth is expected during the Brexit transition period, with a more stable UK economy. Growing consumer awareness of the benefits of UFH, coupled with the ongoing emphasis on low-carbon heating systems, is expected to keep annual growth rates at 4-6% to the end of the forecast period. The information was taken from the Underfloor Heating Market Report – UK 2020-2024 by AMA Research, which is available to purchase now at www.amaresearch.co.uk.

SELECT’s Inspection Service Maintains UKAS Accreditation

SELECT has announced that it has once again successfully renewed accreditation with the United Kingdom Accreditation Service (UKAS) for its inspection activities. Accreditation against the internationally recognised standard for inspection bodies ISO/IEC 17020:2012 means SELECT continues to be officially recognised for the quality of its electrical installation inspection service. In order for accreditation to be maintained, SELECT has been subject to rigorous annual assessment by UKAS since first attaining accredited status in 1998. Dave Forrester, Director of Technical Services at SELECT, says: “Being UKAS accredited is extremely important to us, our Members and the wider public. Holding UKAS accredited status is a key part of our inspection work and brings great confidence to consumers and the wider industry. It demonstrates that our Technical Advisers have proved their competence to carry out low voltage electrical installation inspections safely, impartially and to the highest possible standard.” This year’s UKAS assessment was coordinated by Malcolm Duncan, Training and Development Adviser and Quality Assurance Manager at SELECT.  He comments: “Regular periodic inspection by skilled personnel is essential for the integrity of any electrical installation throughout the course of its life. Having UKAS accreditation provides confidence that these inspections have been considered properly. “Using a UKAS accredited inspection body like SELECT helps consumers reduce the risk of accidents and injuries, improves productivity and also sends the right message about maintaining best practice, professionalism and integrity.” UKAS is the only national accreditation body in the United Kingdom, which is recognised by the government to assess, against internationally agreed standards, organisations that provide certification, testing, inspection and calibration services. Accreditation provides assurance of the consistency and quality of the inspections performed by competent organisations and consequently gives the consumer greater confidence in the safety of their environment. Wisdom Gasu, Assessment Manager at UKAS, adds: “Congratulations to everyone at SELECT for maintaining its accredited status for 22 years. Accreditation assessments are continuous, rigorous and impartial processes. Users of UKAS accredited services can therefore have confidence in both an organised management system and the independence and technical competence of a UKAS accredited organisation to deliver those accredited services.” For further information about UKAS and the importance of UKAS accreditation, visit www.ukas.com.

C.K Cable routing solutions to the rescue

All tradesmen are familiar with cable routing and know the risks of splinters with some cable rods. That has become a painful reality for professionals who have experienced injury when using cable rods by other brands. Recently, C.K has come to the rescue of tradesmen who have sustained bad injuries when using cheaper cable rod sets, made worse by the loss of valuable work time. C.K’s innovative range of quality cable routing products offer unrivalled features to ensure the needs of professional tradesmen are more than met, including vital safe and efficient working conditions. The C.K MightyRods Pro range is specifically designed to combat the issues of painful splintering and snapping, thanks to an innovative SplinterShield coating – Europe’s first splinter-proof material – that fully protects the rods and allows for longer cable runs. Flexibility is also key to successful cable routing and, with that in mind, C.K introduced its super-flexible Spira-Flex rod, perfect for accessing tight corners, bends and other obstacles. The SpiraFlex draw tapes offer fantastic benefits when it comes to hassle-free cable routing. The super flexible and extremely tough 4mm Ø draw tape offers a major improvement on standard nylon and steel draw tapes. The C.K Gloworm cable router adds another dimension to the range and is perfect for running cables around tight corners, through insulation filled walls, underneath flooring and across ceilings. Gloworm’s clever glow in the dark phosphorescent polymer construction aids routing in low light conditions and easier navigation towards exit points. When charged under natural light, Gloworm provides an effective glow for up to 30 minutes. For further information, visit carlkammerling.com

The Pro Wheeled Case lightens the load

Set to be a firm favourite with professionals whose work requires them to regularly transport a heavy toolkit, C.K Magma’s new Technician’s Pro Wheeled Case fits the bill perfectly, combining great features and benefits to make every task that much easier. Ideal for all terrain use, this innovative wheeled case offers more storage than ever before and will effortlessly transport a fully laden toolkit which, with test equipment and power tools, can top 20kg. Regular research with professionals has highlighted the demand for wheeled storage instead of having to carry a heavy toolkit, which can carry the risk of injury. With back problems a significant cause of loss of working days for all trades, the C.K Magma Technician’s Pro Wheeled Case has been designed to take the strain, providing quick and easy transportation of a heavy toolkit to any location. Great features and benefits The C.K Magma Technician’s Pro Wheeled Case offers a fantastic range of features and benefits. Its balanced design includes a rugged and durable chassis, wheels and a telescopic handle, ideal for effortless movement of larger toolkits, test equipment and power tools, whether on a factory site, or commercial premises. More storage now includes 50 pockets/compartments, with handy vertical pockets for clear visibility and organisation of tools, with other quality features including: adjustable straps for easier access to main pocket compartment; lockable zip system for extra security; an extra wide main compartment with a red lining for high visibility; a hard protective divider between tools and test equipment; and a zip down front panel for A4 document storage. If you’re looking for the perfect solution to transport a fully laden toolkit to complete your work, then look no further than the C.K Magma Technician’s Wheeled Toolcase. For further information, visit carlkammerling.com

Stretch trousers with detachable holster pockets

Snickers Workwear’s hi-tech fabrics and body-mapping designs give plenty of scope for every professional craftsman and woman to stretch their performance on site comfortably. Designed for a wide variety of jobs on site, these LiteWork four-way stretch work trousers are the ideal choice if you’re working hard in warmer weather. For maximum flexibility in getting work done, these new trousers feature detachable holster pockets; while the trousers themselves are made from full-stretch material for maximum mobility wherever you’re working. Meanwhile, the Cordura-reinforced Kneeguard pockets offer additional comfort and protection. For maximum functionality, there’s also ruler and cargo pockets for easy access to tools and fixings. They’re all Cordura reinforced for durability, so check out these newest designs – the optimal choice for craftsmen and women who need to get the job done quickly efficiently on site.

Bureau Veritas Urges Industry To Examine 18th Edition

With the IET releasing its first 18th Edition amendment this month, Bureau Veritas is urging the industry to examine the changes in detail, especially in light of the UK’s recent pledge to phase out petrol and diesel vehicles by 2035. Earlier this month, the Institution of Engineering and Technology (IET) published Amendment 1 to BS 7671:2018, setting out changes designed to make the installation of electrical vehicles (EV) charging points quicker and easier, and cheaper for both installers and consumers.  The amendment, which is free to download from the IET website or available to purchase in hard copy, includes changes on supplying EV charging points outside on PME (Protective Multiple Earthing arrangements). The changes are in response to emerging EV charging technologies that monitor fluctuations in voltage and automatically disconnects the supply if it goes outside of 207-253 volts to Earth – essentially providing protection against the risks posed by a broken PEN conductor. It comes as the UK confirmed recently it would be bringing forward its ban on the sale of new petrol and diesel cars by five years to 20351. The move will require tens and thousands of new charging points to be installed across the UK as the government seeks to encourage more people to buy EVs. Michael Kenyon, Technical Manager at electrical safety expert Bureau Veritas says: “The UK’s announcement to bring forward its ban on the sale of new petrol and diesel cars to 2035 reflects the government’s ambitions to reach its net zero emissions target by 2050. “To achieve this will require a societal shift to using electric vehicles – supported by world-class charging infrastructure, which given the accelerating ban, will need to be deployed quicker than expected, but also cost-effectively. Understandably, as technology in this area is moving at such a fast pace, the IET has done a good job of getting on the front foot to ensure the wiring regulations adequately reflect these advancements. “The IET has also sought to future-proof these guidelines. For instance, regulation 722.411.4.1(v) is written to allow other technologies to be compliant by using the phrase ‘alternative devices’, which will avoid the need to reissue another amendment EV charging technology continues to evolve. “However, there are also some points that require careful consideration. A good example of this is regulation 722.411.4.1 Note 6 –states that creating a TT system ‘may’ not be a suitable solution, which conflicts with the previous regulations This may become an issue when assessing compliance as in some instances creating a TT system was the recommended guidance at the time.” “Hence, for many, this amendment, while welcome, may be hard to decipher at first glance. We’d certainly advise those that haven’t done so already to examine the amendment in greater detail and truly understand how the changes will work in practice.” According to Bureau Veritas, it’s also worth noting that unlike previous amendments, and given the special nature of this update, current 18th edition certificates from institutions such as the City and Guilds are still valid. This means electrical contractors will not be required to re-sit their courses in order to be able to carry out work in line with the new amendment. Bureau Veritas offers a range of testing and certification services to support customers in managing compliance around electrical safety for new and existing installations or for specific areas, such as electric vehicle charging points.  

Wolverhampton Electrician Wins Toolstation Van and Tools

Alan Fitzgerald, an electrician and plumber from Wolverhampton, has won first prize in Toolstation’s national competition to win a Ford Transit Custom van worth over £26,000, plus £4,000 worth of Makita power tools. The sole trader, a former maintenance engineer who retrained following redundancy and now works as an electrician and plumber fitting kitchens and bathrooms, collected the keys to his brand-new van from Pete Walker, Divisional Director for the Central Division at Toolstation’s Dudley branch. Reflecting on his win, Fitzgerald expressed his surprise when hearing he’d scooped the top prize, saying: “It came as a real shock! I’d seen a poster in the Dudley branch advertising the competition so entered whilst I was waiting to collect an order, and then just forgot about it because I thought the van was unattainable. When I got the voicemail saying I’d won I had to replay the message three times! You never think the winner will be someone local, let alone yourself.” Over 110,000 people entered the competition, which Toolstation runs each year as a thank you to its customers. Previous prizes have included Milwaukee-branded BMW superbike and a set of DeWalt tools.  Pete Walker congratulated Alan on his win and encouraged customers to keep an eye out for more competitions this year, saying: “Our ‘Win a Van’ competition always proves incredibly popular with our trade customers and is our opportunity to say thanks for choosing Toolstation. In the past 12 months we’ve opened 67 new branches, bringing our total to over 400, and introduced over 3,000 new products which are proving to be a big hit with the trade. We’re predicting further growth this year, so look out for more competitions in branch and online!"