Class 1 2 3 Electrical Appliances

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Class 1 2 3 electrical appliances.

Just thinking of getting into pat testing and was wondering if anybody has or can give me advice on what are class 1 2 3 items. There is no symbol for class 1. Surrey fire safety ltd london office communications house 26 york street london w1u 6pz. Knowing the power source will help you to identify the circuit classification 1 2 or 3 as well as the code requirements regarding use and.

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. Posted on february 9 2017. These are now listed in appendix b of as nzs 4417 2 and take effect on 2 july 2018. A class ii or double insulated electrical appliance is one which has been designed in such a way that it does not require a safety connection to electrical earth ground.

The class 2 label is related to power supply not safety. The iee s code of practice for in service inspection and testing of electrical equipment 3rd edition states that there are 5 classifications of electrical appliances these are class 0 01 1 2 3. Class iii appliances use an isolating transformer. Class 1 2 and 3 of remote control circuitry shall be classified as class 1 only if the interruption or failure of equipment on these conductors could impose a direct fire hazard or life hazard.

As they only have 1 level of protection class 01 appliances are not. Any appliance which plugs into the mains will be either class 1 or class 2. Surrey fire safety ltd basingstoke branch. The basic requirement is that no single failure can result in dangerous voltage becoming exposed so that it might cause an electric shock and that this is achieved without relying on an earthed metal casing.

Kettle pc monitor lamp fridge ac adapter. As nzs 4417 2 2018 was published on 2 july 2018. It also follows another standard ul 1310. In simple terms a class 1 appliance has an earth connection whereas a class 2 appliance will have two layers of insulation protecting the user from the mains inside.

Class 1 and class 2. Class iii appliances are identified by the class iii symbol. This publication introduced eight modifications and additions to the classes of prescribed electrical equipment categories. Examples of class iii appliances are laptops mobile phones and low energy light bulbs.

As in class 0 equipment one is dependent only on basic insulation for protection from electric shock. Pat testing list of class 2 electrical appliances. Class 2 appliances are sometimes referred to as double insulated. Classification and types of appliances.