[asmithmd1]

"Engineering is a thing you do. It is not the name of a course, a piece of paper, or a certification exam."

Actually it is a piece of paper. In every state in the United States you have licensed by the state to call yourself and engineer and sell engineering services. The same as doctors, nurses, lawyers, barbers, and whatever other professions states deem required to have licenses.

[Daniel_Newby]

"In every state in the United States you have licensed by the state to call yourself and engineer and sell engineering services."

And those laws almost universally ignored.

The trouble is that the laws are so overbearing that they choked off the supply of new licensees. The first people to get licensed, because that was the entire industry at the time, were things like boiler and power engineers. Suppose you were a young engineer and you wanted your PE license to design metal detectors "properly". You'd have had to specialize in something like power systems, sign up with whoever had a PE on staff, spend 6-12 months sizing transformer windings and designing 50 kV relays (because most PEs worked at places like that). Then you have to jump ship to work with a different PE, because you need to accumulate an apprenticeship under four PEs before you can get a license. Only then can you get your license and go back to school to specialize in what you actually want to do. Finally, in your late 20s, with no job longer than a year, and just starting work on your passion, you can try to get a job in metal detection.

Most new engineers sensibly decided to just break the law. Even if the engineering board were certain to catch up with you, it would be easier to quietly move to another state in the middle of the night and start over. And the actual odds are more like one in 10,000.

P.S. IIRC Texas scrapped a lot of their silly PE laws.

[assemble]

For a PE in KS, you complete an engineering curriculum. Take the FE test. Then you study under any PE for four years. (Not four different ones for one year, but I suppose that would work.) Finally, you have to pass another test. It's not really too much to ask for the guy signing the blueprint that says the power lines or building being put up won't kill anybody.

[Daniel_Newby]

That's a step in the right direction, and many jurisdictions seem to be doing it lately. However it is still too much. They need more gradations, like how medicine has a spectrum from phlebotomists (people who draw blood) to board certified neurosurgeons. As it is, a handyman who uses Ohm's law to choose the size of a wire has committed illegal engineering.

[assemble]

Generally, Electricians can do things similar to that if they follow the local electric code. I've watched them work--they don't consult the building drawings or whatever, and they can make some pretty extensive changes.

The PE license gets you the ability to sign off on drawings, so if there isn't a drawing change involved, there isn't any engineering to sign off on.

[Daniel_Newby]

Read the actual laws. They generally require a licensed PE for any task that (1) requires engineering or technical knowledge to complete correctly, and (2) has an influence on life, health, or property, no matter how trivial. It's like requiring personal trainers to be board-certified cardiologists. Naturally everybody ignores this, and compliance consists of not drawing the attention of the state engineering board.

Electricians follow a handbook rather than derive results from general knowledge, so the PE laws don't apply. As long as the electrical code handbook allows it, they can do it. Possibly at enormous expense, which is why you want a power engineer to plan your factory wiring.

[assemble]

The laws vary from state to state. I'm not going to read them all. Here are the laws in my state: http://www.kansas.gov/ksbtp/statutes.html Specifically pertaining specifically to who does or doesn't need a license: http://www.kansas.gov/ksbtp/74-7035.pdf

I've always thought a phlebotomist is similar to a licensed electrician. (Assuming an MD is similar to a PE)