How often do I need to test my electrical appliances?

This is an interesting question as the perception is that everything should be tested every year, if only this was the case, it would make life a lot easier for those doing the tests. The fact is that there are no hard and fast rules as to when or how often items should be tested.

Let’ s look at the whole picture first, portable electrical appliances need to be inspected and tested on a regular basis, inspection frequency need not be the same as the testing frequency, in fact they should be inspected by the operator every time they are used (is the plug damaged? are there any breaks in the cable? is there any damage to the appliance casing?) In other words a common sense approach to using any electrical item. This said not every fault will be spotted by a simple inspection, therefore it is essential that a regime of thorough inspections and testing be set up.

Now we go back to the original question, how often? Although there is no hard and fast rule, there is a code of practice produced by the IEE which provides guidance for qualified testers to use, to answer this question, however the final frequency will depend upon many factors, which an experienced tester will take into account and come up with a sensible schedule.

There are three main considerations when deciding how often to test an electrical appliance:

1.    Type of premises: The conditions or type of premises will have a major effect on the frequency of testing, imagine using something as simple as an extension lead, these can be found in every environment, however we would not expect one in an office to be subject to damage as much as one in a fabrication workshop. In general we would categorise the premises into 6 sections; Construction, Industrial, Public, Schools, Hotels and Shops & Offices.

2.    Type of Equipment: The appliance itself will also dictate the frequency in which it is to be tested, some equipment is more susceptible to damage than others, for example an electric drill is more at risk than say a refrigerator, in general terms the more portable an appliance is, the more it is likely to get damaged. Appliances are generally split into 5 categories; Stationary, IT, Moveable, Portable and Hand-held.

3.    Equipment Construction: When we say construction, we mean how well the live electrical parts are separated from being able to be touched, in other words how well they are insulated. An appliance which is well insulated will need a less frequent inspection regime than one that only has basic insulation. There are four classes of insulation, class 0 which has only basic insulation and no earth, class 1 which has basic insulation and a facility to connect to earth, class 2 which has enhanced double insulation but with no earth and finally class 3 or separated extra low voltage , which uses low voltage power fed from a double insulated transformer and no earth.

As can be seen here, there are many permutations to be taken into consideration when deciding how often to test an electrical appliance, which is why a qualified PAT tester will have been trained not only how to check the equipment, but also how to manage the testing regime. So going back to the original question “how often do I need to test my electrical appliances” there are 120 possible answers for each and every appliance, so please let the experts sort it out for you.

We hope that we have been able to answer the question and demonstrate that having your appliances tested at the correct intervals is not a cost, but an investment in your company’s future prosperity. Should you have further questions about this subject or any other health and safety issues, then please do not hesitate to contact us via www.anchorhands.co.uk