Answer to Question #116948 in Electric Circuits for James

Question

kettles and hairdryers are often ‘double insulated”, what is the significance of this?

Answer 1

An electrical appliance which is double insulated does not have an earth wire fitted. The appliance is designed in such a way that the electrical parts can never come into contact with the outer casing of the device. Common double insulated appliances are hair dryers, radios and cassette players.