Thanks ! Nice link. But, in this case, you're expected to *know* which wire is "line" and which is "neutral". Here in Sweden, as in most parts of Europe, we can turn the plug anyway round, so there is no way of knowning what's "line" and whats "neutral". Jan-Erik. -----Original Message----- From: Anand Dhuru [mailto:ardhuru@VSNL.COM] Sent: den 17 februari 2003 09:38 To: PICLIST@MITVMA.MIT.EDU Subject: Re: [EE]: Measuring AC mains with a O-scope. Here's a page that addreses your issue, gives a neat solution too: http://www.geocities.com/ido_bartana/oscope.htm Regards, Anand Dhuru -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics