three pin plug technical , also: three point plug

Alternatively, you could use a three pin plug with a built-in thermostat, available from electrical retailers.

Laws changed included bunk beds, cooker design, microwave controls, the use of plastic in kitchen equipment, three pin plugs and many more.

The other method of theft is committed by using a device having a three pin plug, which is inserted in the socket affixed on the electricity switch board of a house.

Electrical appliances were fitted with 2-pin plugs and quasi-UK three pin plugs (which meant they were compatible with BS 1363 or BS 546 sockets, but the plug itself did not comply with the British Standard).