Examples Class 1 Electrical Appliances

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.

Examples class 1 electrical appliances.

If it is made of metal it must be a. Class iii appliances are identified by the class iii symbol. Class 1 appliances are as follows. Some examples of class 1 appliances are toasters kettles washing machines and irons.

A typical example of a class 0 appliance is the old style of christmas fairy lights. 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. I have come across a few instances of a two core extension lead powering a desk complete with computers monitors printers 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.

These appliances do not have their chassis connected to electrical earth. All electrical appliances using mains voltage have to provide at least 2 levels of protection to the user. Typical class 1 items toasters kettles washing machines irons and many more. When pat testing class 1 appliances earth continuity and insulation resistance tests are carried out.

Class iii appliances use an isolating transformer. Examples of class 1 equipment are kettles toasters irons microwaves electric heaters fridges freezers washing machines and tumble dryers etc. These appliances are known as double insulated due to the presence of at least two layers of insulation. The class 2 label is related to power supply not safety.

Appliances can be class 1 or class 2. Examples of class iii appliances are laptops mobile phones and low energy light bulbs. 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. 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.

This makes electrical equipment very safe to use. The symbol for class i items looks like this and should be found somewhere on the appliance. There is no symbol for class 1. 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.

It also follows another standard ul 1310. 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.