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physicists: a quiz?
when we want to weld a machine,for example a grinding machine arc welding, we must disconnect electric power. Why?please explain exactly.
3 Answers
- druidLv 71 decade agoFavorite Answer
Arc welding is an electrical welding process. The power to the machine must be disconnected because any electrical fields would interfere with the fields created by the welding process.
- Anonymous1 decade ago
To avoid sneak paths by which the welding current could get into the power lines, or power line current get into the welding circuit. This applies only to electric welding; if you use gas, it doesn't matter.
