Yes it was a two night a week schooling. While I was working. The three year's I spent could have been an engineering course. That is the way it felt. I covered all kinds of electrical application's even A/C and heat. My book is an engineering hand book. National electrical code cover's every thing. You have Hydro plant. Steam plant's. Also worked on Nuclear plant. Had a lot of Engineering firms try to get me to go to work for them but liked building. I got to travel every where. I was in charge of over 3 hundred men on one job. I thought I was a baby sitter most of the time. Russ.