There is also a requirement for 4 wire 220V single phase wiring. A henry 2K4A is an example. Albeit it can be done with 3 wires. Hank -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com Search: http://www.contesting.com/km9p/search.htm