I believe the device you're reffering to is called a GFCI or Ground Fault Circuit Interrupter here in North America. Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams On Sat, 26 Jun 2004 16:13:37 +0100, Howard Winter wrote: > An RCCD (Residual Current Circuit Device - I forget what they're called Stateside - trips when an imbalance of > Line/Neutral current happens) for when I'm working on something that's mains-powered. -- 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