Matthew writes: > In the US most 240V outlets are 3 phase... They are 240 V center-tap grounded. That is what is provisioned to most residences in the USA, usually from a single-phase transformer on a pole (or on a pad if distribution is underground). 120 V branch circuits are distributed equally between the two 120 V lines in the breaker panel. Electricians incorrectly refer two the two 120 V lines as phases and the grounded conductor as the neutral.
Three phase is perfectly legal if you are willing to pay for it, though. -- John Hasler jhas...@newsguy.com Elmwood, WI USA
