Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; electronic control devices, namely, isolation switches, electronic cut-out devices; electronic hazard control devices, namely, isolation switches, electronic cut-out devices; electronic switches, namely, cut-out switches, on/off switches, remote switches; electronic switches, namely, cut-out switches, on/off switches, remote switches; electric breakers, namely, electric circuit breakers, trip units for circuit breakers, isolator switches, cut-out switches, electric relays, protection relays, power interrupters, current interrupters, circuit interrupters; isolators, namely, mechanical and semiconductor relays for isolation of imbalanced electrical circuits; electronic trigger switches, namely, battery operated or hand operated switches for switching on welding power supplies; electronic hazard control devices comprising automated isolation switching and hand-piece trigger switches for shutting off the voltage output of a welding power supply; electronically controlled power supply apparatus, namely, power supplies with remote switches; protection systems comprised of electronic switches for zero voltage open circuit voltage for electronically controlled power supply apparatus, namely, electronic welding power supplies; electronically controlled welding power supply apparatus, namely, welding transformers, electronic welding power supplies; electronically controlled protection systems comprised of remote switches for reducing open circuit voltage of welding power supplies to zero volts for electronically controlled welding power supply apparatus, namely, electronic welding power supplies; electronic power measuring apparatus for welding apparatus, namely, power meters for welding power supplies; apparatus and electronic instruments, namely, remote and manual switches for controlling welding equipment; computer software for use with welding machines to isolate the power output of the welding machines; electric and electronic components, namely, mechanical and semiconductor relays for the isolation of the power output of welding power supplies; electric and electronic control apparatus for controlling welding machines, welding power supplies and switches for welding machines and welding electric power supplies; electric and electronic control welding apparatus, namely, welding transformers, welding power supplies; electronically controlled protective and safety equipment, namely, remote cut-off switches for power supplies, mechanical cut-off switches for power supplies; replacement parts, for all of the aforementioned goods