One of my best customers would like to learn more about electrical systems as they would apply to his plant. It's a company that manufactures small medical items, so the main focus would be the 480/277 distribution system, xfrmrs, the office power, etc.
He already knows the first rule: Call the electrician
Does any one know of an online "basic" class that would fit the bill? This guy's smart as a whip, and College courses would I'm sure move too slowly for him.