On Sep 16, 2010, at 9:24 AM, Johnny Rosenberg wrote: > Den 2010-09-16 06:35:15 skrev terry l <xtlynne at charter.net>: > >> 311 volts is 220, peak to peak >> Actually it's not. 220 VAC RMS is the same as (assuming a nice clean sine wave) 311 volts PEAK or 622V Peak to Peak.