Pat Testing Classes


PAT testing is a procedure that you conduct on electrical appliances to ascertain their safety. It is a legal requirement in a number of countries that this kind of test be conducted to ensure that the safety of the workers and other business stakeholders are guaranteed. This will serve to prevent a vast majority of electrical accidents which are caused by faulty electrical appliances. It is quite noting that the kind of testing that you will conduct on your electrical equipment will highly depend on the class that your electrical equipment actually falls in. this is defined by the IEC or the international electrotechnical commission. It is thus of great importance to know how you are supposed to identify the various electrical equipment into their different classes. In fact, you will learn how to identify them in the short training course that you will undergo.


Class 1 electrical appliances: these refers to those equipment that have only a single box label on top of them. These appliances have an insulation that is only a layer thick and it can only be checked for safety by earthing.

Class 2 appliances: these items have a double label of boxes on top of them. They have a double layer of insulating material thus do not have to undergo the earthing test.

Class 3 appliances: these appliances come together with a transformer that is labelled. They have a voltage supply that is low and could deep as low as 50 V. these appliances are often said to be supplied with separated extremely low voltage.

NB: both the last two classes i.e. class 2 and class 3 appliances have to have the appropriate labelling. Appliances without any labelling can be assumed to be those of class 1 type. Previously, we used to have class 0(not earthed) and class 01(earthed); these used to use two cables although they have been banned ever since.

Pat testing equipment.

You can be able to use a variety of tools to conduct the pat test. It is important to note that you will not use your normal plugs and cables to conduct the pat test; you will have to look for more specialized equipment which are meant to be specifically used in the process.

These pat testing equipment that are mainly in use are those that can indicate whether the appliance has failed or passed the test. These equipment are highly preferable because of their simplicity as they do not require the user to be highly trained to operate it. The equipment can use earth continuity, wiring tests and insulation resistance testing to ascertain whether they are safe for use or not. Some of the equipment have even some more advanced options which give you the choice of having to label on the appliance the appropriate test result. Some of the appliances are battery powered which makes them quite portable for use in areas that are far from their organization. It is however important to note that the labelling of the testers on the appliances will not have any logs stored on them hence need to do this elsewhere. Usually, professional testers have highly advanced equipment which they can use to conduct very comprehensive tests. Thy can possess computerized testers which can give you a wide functionality including storing the logs on the barcodes on the appliances.