One of the more accepted hookups is to connect the output of the variac to the input of a 24v or 40v transformer, of sufficient power handling capacity, and then hook the hot wire to the output of the transformer. This way you get isolation and a fine vernier control of the actual cutting voltage. Bob > >------------------------------ > >Date: Thu, 19 Jul 2001 23:44:55 EDT >From: [EMAIL PROTECTED] >To: [EMAIL PROTECTED] >Subject: Re: how to make variac safe? >Message-ID: <[EMAIL PROTECTED]> > >I've used a variac for cutting foam for a couple years, no problems, but I'm >ALWAYS very careful and methodical. Still, is there a way to add something to >it that would make it safer? Keeping it simple. ------------------------------------------------------------------------- Robert P. Andris 12155 Terrence Ave. Saratoga, CA 95070 USA (408) 252-5469 LSF 004, AMA 5055 RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]