Joe,
I received my BSEE in 1960 and received no training in the NEC until I took a refresher course for my PE license in the early 1970s.It was then I became aware of the importance and purpose of the NEC.Prior to that I was a RF transmitter/receiver designer for Microwave systems and had no reason to be interested in the NEC.When I took the PE exam in Florida there were several references to the NEC on the exam.
I continued on with RF design until 1999,retired and realized I could receive an Electrical Contractors license(if I passed the state exam)in the state of Florida with my PE license and was allowed to sit for the EC exam.With the help of Mike Holts crash course I passed and got my license.The only NEC I knew at that time was what Mike taught in his course and what I remembered from my PE studies.I have since worked with a few EC/Master Electricans that taught me the practical aspects.
ECN has been a valuable part of my continuing education in the EC and NEC world.
Chris