Here are two examples:
Originally Posted by Tigerracer
In each example, the shared neutral will only carry current if there is an unequal load on the two (or three) phase conductors.
- On a 120/240 volt, single phase system, bring two ungrounded conductors and one shared neutral to outlet for an electric range.
- On a 120/208 volt, three phase system, bring three ungrounded conductors and one shared neutral to an office area, and feed a number of receptacle outlets for computers and table lamps.
Charles E. Beck, P.E., Seattle
Comments based on 2014 NEC unless otherwise noted.