> I am referring to as separate connection from neutral to ground at the > consumers board. Then from there, the consumer's ground distributed > throughout the building. And no, this is NOT done all over the world. > > A relatively recent introduction in North America, if I am not mistaken. Depends on what you mean by recent. Some very old systems actually ran one wire and used the earth as the other conductor. Apparently rare instances of these survived until the 1980s in remote areas, but new systems haven't been installed that way since long ago (back when Australians were referred to as "inmates" ). ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body