Trying to make a table-mounted hot knife for rope cutting
I'm wanting to build a mountable hot knife for cutting climbing rope, similar to the ones at http://www.wirecare.com/hot-knives.asp and http://www.rocknrescue.com/acatalog/Table-Hot-Knife.html, using a method similar to flywoodkb's https://www.instructables.com/id/Hot-wire-foam-cutter/. How should I go about keeping the "prongs" coming out of the box from electrocuting me/causing a short? I'm hoping to use a jigsaw blade for the blade part.Also, I have a handful of transformers from disassembling some electronics. Is there a way to tell what voltage and amperage they are? Any help would be appreciated. Thanks!