No written pages. Mike Holt's 2020 Understanding the NEC, Volume 1 Textbook is a trade paperback book written by Mike Holt, focusing on educating adults and those in further education on the National Electrical Code. The textbook covers Articles 90-480 of the 2020 NEC, providing a detailed understanding of electrical code requirements and regulations. With a clear and informative approach, this textbook serves as a valuable resource for individuals looking to enhance their knowledge in the field of electrical code compliance in the United States.