Two short videos that I made a few years ago discussing transformer theory.
This is a one hour webinar that I gave for my friends at Redvector.com. I am a content provider for RedVector, who supplies educational materials for many different industries. They contacted me in 2016 to ask if I would provide most of the 2017 NEC changes changes content, and we created a great relationship. The courses that I created for RedVector can be found here, and there are four more that are currently in post-production and should be available soon. These courses are approved for continuing education in most states.
Want to make a change to the National Electrical Code? Here's how you do it.