It's my understanding that "officially" there is only one type of electrician. I'm referring to the official title. A licensed electrician needs to know how to install your light switch and provide power to a new shopping mall and everything in between.Without actually having been there, I suspect you'd have a pretty tough time becoming a qualified electrician without at least a modicum of formal coursework. OJT is fine for swinging a hammer, but there's a heckuva lot more theory involved in the electrical field.
Now I know people specialize, but the knowledge for the actual license requires that? Am I right?
I know a few actual electricians, but they're all college graduates with electrical engineering degrees. And they only do commercial/industrial. I actually don't know any residential licensed electricians. Not one.