Mar 11, 2009 06:45:59 AM, [email protected] wrote:
Please explain European (house) power. It is "220V", is one side grounded?
Is it 220/440 like US power is 120/240 with grounded center tap?
Lee Haefele
The standard in Europe is 380/220/3PH/4wire "Y" with center tap grounded, thus 220 is a grounded single phase.
Here in USA, 480/277/3Ph/4 wire "Y" with center tap grounded, thus 277 is a grounded single phase.
The USA uses a lot of 120/240/1PH/3wire for single phase distribution, thus 240 phase to phase ungrounded and 120 phase to center tap ground.
This configuration is commonaly known as a "3 wire Edison".
It's a case of oranges and apples.
Lew
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