In last month’s column, I introduced the traditional approach to hazardous locations. This month, I discuss hazardous materials grouping with some specific occupancy requirements, and I compare the traditional way of...

My 40-year career using the National Electrical Code (NEC) began in an unusual place, toward the center of the Code book, specifically Chapter 5. I began that phase of my career working for the research arm of a large...

Many of the articles I write for ELECTRICAL CONTRACTOR originate as questions from people who read my columns or attend my workshops. This article is based on a question from an electrical contractor friend who is doing an...