Class 1 – Earthed Appliances - Washing machines and dryers, free-standing printers, desktop IT equipment, vending machines, industrial machinery, fridges and freezers, toasters, dishwashers, microwaves, toasters, kettles, irons, electric heaters, laptop cables, extension leads, etc.;
These are grounded electrical appliances and a full PAT testing should be performed on them.
Class 2 – Double Insulated Appliances - Hedge trimmers, desktop printers, lawnmowers, food mixers, lamps, TV sets, DVD player, handheld devices like hair dryers and drills;
These require only a reduced PAT test, called insulation test, because the devices are not earthed but are extra insulated for protection.
Class 3 – Low Voltage Devices - Laptops, mobile phone chargers, cameras, LED light bulbs, torches.
As the above appliances are considered low voltage (under 50 V), PAT testing is not applicable to them.