How would you hook 208 three phase into 120 - 240 volt dwelling?

Answer for USA, Canada and countries running a 60 Hz supply service You would use a 1 Phase, 208 input, 120/240 output transformer No! This question is really asking how to obtain a 3-phase supply inside a dwelling that currently has only 120/240v single phase. The answer is to ask your electricity supply utility company for a quotation to install all 3 phases onto a new breaker panel.

Then, to provide the 3-phase circuit(s) you want to use, you can have appropriate 3-phase breakers, cable runs and outlets installed by any licensed electrician IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS If you do this work yourself always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use an electricians test meter having metal-tipped probes to insure the circuit is, in fact, de-energized.

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