Examples Class 1 Electrical Appliances

Class 1 appliances are as follows.

Examples class 1 electrical appliances.

When pat testing class 1 appliances earth continuity and insulation resistance tests are carried out. Class iii appliances are identified by the class iii symbol. Any appliance with 3 core cable live neautral and earth cable. The class 2 label is related to power supply not safety.

The point is you need to look at the markings on the appliances the flex used and inside the plug to determine what class an appliance is. Some examples of class 1 appliances are toasters kettles washing machines and irons. This makes electrical equipment very safe to use. These appliances do not have their chassis connected to electrical earth.

These appliances are known as double insulated due to the presence of at least two layers of insulation. Examples of class iii appliances are laptops mobile phones and low energy light bulbs. Appliances without the double box symbol are of class 1 construction and need the earth continuity and the insulation resistance tests carried out during pat testing. If it is made of metal it must be a.

With class 1 appliances the user is protected by a combination of basic insulation and the provision of an earth connection thus providing two levels of protection. Appliances can be class 1 or class 2. Of course you could look inside the plug a class 2 appliance should only have 2 wires brown and blue whereas a class 1 will have 3 wires brown blue and green yellow however it is not unusual to find appliances which have been rewired or modified bodged with the wrong cable so the only way to. There is no symbol for class 1.

This is to ensure that if one of the protection layers were to fail there is the back up of the second layer still in place. Class 2 equipment has supplementary insulation and therefore does not rely on an earth for protection and is easily identified by the double square symbol and will receive an insulation test. All electrical appliances using mains voltage have to provide at least 2 levels of protection to the user. It is not a simple as it s an extension lead therefore it is class 1 etc.

If the appliance is in a metal enclosure like an electric fire or a washing machine then it is relatively easy to clip the earth test lead to a metal point. However equipment of this class is common in some 110 v countries and in much of the 220 v developing world whether permitted officially or not. A typical example of a class 0 appliance is the old style of christmas fairy lights. I have come across a few instances of a two core extension lead powering a desk complete with computers monitors printers etc.

It also follows another standard ul 1310. The symbol for class i items looks like this and should be found somewhere on the appliance.