Quentin wrote: > Put spark suppressors over the relay contacts. Either an RC circuit > and/or a spiketrap (forgot the name now: Varistor?) over the AC supply. The 45Vac go through the normally open contact of the relay and the common contact using them as a switch for an other machine (the welding gun switch). The AC is not in the coil side. > Oh, and welcome to the real world (and its problems). Thanks, this is my second real-world circuit, so I expected this kind of out-of-the-lab problems :) Jaume. ---------------------- Jaume Aragay Badia aragay@email.com ----------------------