This package combines Mike's Best-Selling Illustrated guides into one great package. Find out why these books have become the standard for NEC training. Mike's ability to clarify the meaning of the Code with his clear concise writing style, along with his highly praised full-color detailed color illustrations is the reason that these books continue to grow in popularity around the industry. This bundle includes: · Understanding the NEC Volume 1 Textbook [Articles 90 - 480] · Understanding the NEC Volume 2 Textbook [Articles 500 - 820] Digital Answer Key(s) included with this product.