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There are a number of excellent proving devices available to ensure voltage indicators and test lamps can be checked prior to, and immediately after, a circuit has been proved. And as manufacturers become more and more aware of the importance of confi rmation by proving devices, they are often supplied as bundles, with voltage testers and lamps to encourage routine testing of the indicators every time they are used. Nowadays, the bundles even include lock off kits to ensure that the supply cannot be re-energised while you are working.


What about multifunction testers and their suitability for the domestic and industrial market? Multifunction test instruments can perform all the tests required to evaluate the safety of an electrical installation in accordance with UK and international standards covered by Part P and the 17th Edition of IEE Wiring Regulations. However, multifunctional devices are not, in our opinion, as good as a simple, dedicated voltage indicator or lamp for proving dead. The testing and measuring function are a different job to proving dead, and separate instruments are better. After all, multi-function testers have to be used on both live and dead circuits for different tests, and proving dead is a task where absolute clarity is key. Similarly, multimeters, with many ranges, are not recommended, as it’s too easy to select the wrong range by mistake. Because of all the other functions these sophisticated instruments can perform, it can sometimes be easy to misinterpret the information received. Where operator safety is of prime importance, we have


to realise the most important factor is the electrician’s safety, and this is why we fi rmly believe that simplistic testing using a voltage indicator or lamp and proving device will clearly highlight any testing problems.


The proving device will prove that the voltage indicator is working, which is the most important consideration.


Reliable Power for a Sustainable World


Now available


The ECA is now offering a range of domestic and professional lock off and isolation kits, and to complement these, the ECA has introduced a range of high quality Martindale voltage testers and proving units, at competitive prices for ECA registered members. Visit www.eca.co.uk or www.elecsa.co.uk or call 0333 321 8225. Martindale Testers currently available from the ECA and ELECSA online shops are listed below: MARVIPD safety voltage and combined proving unit, including carry case (Manufacturer’s recommended retail price (MRRP)) – £130; ECA offer – £99 MARVI voltage indicator – Model 13700/2 (MRRP) – £43.75; ECA offer – £36 MARPD440 – 44O Volt proving unit (MRRP) – £81.52; ECA offer – £68 MARTC69 – soft carry case (MRRP) = £19.85; ECA offer – £14 (MARVIPD includes this for free)  All prices exclude VAT. Postage and packing free on all orders over £50 to a UK delivery address.


At the very core of Riello UPS is our commitment to Service, Efficiency and the Environment. That’s why datacentres and industrial installations across the world rely on the MASTER range of Uninterruptible Power Supplies. Providing maximum resilience and up to 98.5% efficiency in a compact and flexible design, the MASTER range represents the ultimate in power protection.


Master MPS & Master HP


Call: 0800 269 394


email: sales@riello-ups.co.uk www.riello-ups.co.uk


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