http://www.uptonaustralia.com.au/gf12.htm Bottom of the page: Electrical Power 220 VAC, 50/60 Hz 1=D8 (3=D8 option) 5.5 Kw That would be single phase, 220. Black is one phase, white is the other phase, and green is earth. Quick google keywords: APS GF-12 power Andrew Kelley -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist