> Don't know if this applies but SOME ships have/had floating > mains systems with neither side earthed. Could make life > exciting construction wise The ship's engineer has faxed that the mains is produced by "a standard method", his words, varying from 58Hz to 61Hz -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body