If my employer asks me to change a light switch I don't have a problem. But he has asked me to change 240v breakers and I don't like to. Is there a standard, ordinance, law or anything available on line that I can show him that says I cannot do that. I called OSHA but they said they did not regulate that. They sent me to the NEC website but I don't know where to start. Can someone quote me or lead me to somewhere that I can show him to prove to him this is not right? I think I posted this in the wrong place first...Sorry Thanks