Part 4 of this series focuses on revisions in Chapter 2 of the 2020 NEC, “Wiring and Protection.” This article looks at some significant changes in Articles 210, 215, 230, 240 and 250. Section 210.8 GFCI Protection for...

Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Send questions to codefaqs@gmail.com. Answers are based on the 2017 NEC...

A long-standing requirement in the National Electrical Code (NEC) is to provide a service disconnecting means for each building or structure served by electricity. The concept is simple; the disconnecting means serves as a...