On Tue, 19 Jul 2016, Paul Koning wrote: > Yes, and time dependent as well. I grew up in Holland; in the 1970s, we > had 3 phase in our house because we had an electric cooking range.
As you probably know, that's not usual the setup in North America, even for folks with electric ranges. > In the USA, if you're a home owner with a need for 3 phase power, you > probably have to get a phase converter. Fortunately those are not hard > to get, and solid state ones (variable frequency motor controllers) can > be rather inexpensive. I've been responsible for bringing 3-phase into several new buildings. I'd totally endorse a VFC in most cases (except that it's one more part to break if that's a concern). The reason is that the lowest cost I've seen in Colorado was $4500 and the most is $7000 from Xcel. I've *never* heard of them simply saying "Oh your old transformer will handle that just fine." YMMV -Swift
