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Some countries (Europe, Japan) use 120 volt systems. Australia uses 240 volt. One way of find out what voltage is used is to have a look at the pins on the appliances in the same area. 120 volt has round pins on the plug socket. 240 volt systems have 3 flat blades with rounded ends set at 30 degrees to each other around the centre of the socket

If you are in the US and have a residential 120/240 volt system and want to know if you should use 120 to ground or 240 volts phase to phase. You should check the voltage rating of the equipment you are wanting to use. Never exceed the voltage rating.

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15y ago

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