Ashley, > The other alternative is that the standard was written between rounds > at the > pub. ;) Taking work to the pub? Fair go, mate. How Australian is that? More like the standard was going to press at 2:00pm on a Friday and they pulled the number out of a hat - just to get to the pub! But seriously though, if the US is running at 7mA and we use 30mA and still see trips on refrigeration equipment, does it come down to our dirty power that Roman already pointed out? Or is this simply due to inherent operating characteristics of refrigeration equipment? I am curious if they run refrigeration compressors through protected circuits without nuisance trips in the US. Cheers, Sean -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body