Delmar's Standard Textbook of Electricity, Cengage International Edition

Stephen L. Herman was an electrician and proficient instructor with over 30 years of practical experience and was known for his reader-friendly approach. A seasoned author, Mr. Herman wrote leading books on electricity and mathematics that are popular with students and instructors alike. For two decades, Mr. Herman served as lead instructor for the Electrical Technology Curriculum at Lee College in Baytown, Texas, where he received an Excellence in Education Award from the Halliburton Education Foundation. He also taught at Randolph Community College in Asheboro, North Carolina, for nine years and helped pioneer an electrical curriculum for Northeast Texas Community College in Mount Pleasant, Texas. His additional publications include ELECTRIC MOTOR CONTROL, ELECTRICITY AND CONTROLS FOR HVAC/R, INDUSTRIAL MOTOR CONTROLS, UNDERSTANDING MOTOR CONTROLS, ELECTRONICS FOR ELECTRICIANS, ALTERNATING CURRENT FUNDAMENTALS, DIRECT CURRENT FUNDAMENTALS, ELECTRICAL STUDIES FOR TRADES, ELECTRICAL PRINCIPLES, EXPERIMENTS IN ELECTRICITY FOR USE WITH LAB VOLT EQUIPMENT, THE COMPLETE LABORATORY MANUAL FOR ELECTRICITY and PRACTICAL PROBLEMS IN MATHEMATICS FOR ELECTRICIANS.

Derek Vigstol is an electrical safety consultant for e-Hazard Management, LLC, where he provides training and other consulting services such as electrical safety audits and electrical safety program development based on OSHA and NFPA 70E®: Standard for Electrical Safety in the Workplace®. Derek earned his master electrician license in the state of Minnesota, where he began his journey into the world of electrical construction. He was also the founder and President of Rum River Home Inspections, LLC. He found his way into a classroom for the Minneapolis Electrical JATC, where he taught both pre-apprentice and apprentice-level electrician students. As an instructor, he participated in the first-ever NEC® Challenge hosted by the National Fire Protection Association (NFPA). Derek became the inaugural NEC Challenge Champion after competing against electrical code experts from across the country. This title then earned him a position working as a member of the technical staff at NFPA. Starting in a staff liaison role guiding NFPA members and AHJs on all things electrical-related, Derek worked his way up to electrical technical lead and eventually senior electrical content specialist. In these roles, he had the opportunity to act as a technical contributor to several key projects -- most notable was his role in the 2017 and 2020 editions of the NEC® Handbook. He is a member of the International Association of Electrical Inspectors (IAEI), the Institute of Electrical and Electronics Engineers (IEEE) and the National Fire Protection Association. Derek has presented on various electrical topics at conferences around the globe and is a regular contributor to several publications in the electrical industry.