In St. Louis we only have contractor licenses but as a contractor I can tell that there is a major difference between a good commerical or general electrician and an individual who is rated for residential. The residential electrical is good with romex and single phase. I have an individual who is a great residential guy but don't ask him to work solo in a commerical job. He just doesn't understand three phase and would have trouble with laying out circuits and motor loads. There any people who work in residential new construction all the time and there skills are good for what they do , just as a good commerical guy doesn't do well in the residential setting.
