Steve, Your electric utility might be a good source of information. BTW, The New England Blacksmiths is holding it's Fall Meet on Oct. 3-5 in Brentwood, New Hampshire. Nol Putnam will be the featured demonstrator. Send me your mailing address off-line and I will send you a registration package, if you are interested. Also see: www.newenglandblacksmiths.org Regards, -Rick Korinek