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Lew Hartswick Lew Hartswick is offline
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Default Power feed Wiring for Bridgeport Mill

F. George McDuffee wrote:
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In the US it is common that these mills are wired to run off 220
volts 3 phase. Any one of the hot 3 phases should produce 110
volt single phase to neutral. If you are running 220v 3 phase 50
cycles, you only alternative may be to get a transformer,
although I would check to see if you have a dual voltage motor on
the Align power feed.

Unka' George [George McDuffee]

George, Strictly speaking if you refer to the 3 phase power that
has available 120 nominal from phase to neutral then the phase to
phase voltage should be refered to as 208. This is Y connected.
There is the Delta connected that does indeed produce 220
or 240 but then the neutral is the centertap of one leg and the
voltage from the other (wild leg) will be a lot higher than
120
Maybe I shouldn't get involved in this.
...lew...