This video is extracted from Mike Holt's Understanding Electrical Theory Library https://www.mikeholt.com/Theory. For additional information call 888.632.2633.

For almost 50 years, Mike Holt Enterprises has been providing quality training products for the electrical industry that help people learn the Code, prepare for exams, fulfill continuing education, and improve their electrical knowledge.

Visit https://www.MikeHolt.com for exam preparation tips and training, instructor and curriculum support, continuing education options, free videos and graphics, and so much more.