Mark Hilbert was the former chief electrical inspector for the state of New Hampshire and now operates a private electrical inspection, training, and consulting business. He is a licensed master electrician in three states, a certified electrical inspector by the International Association of Electrical Inspectors, and a Certified Electrical Safety Compliance Professional. Mark is a former member of NEC Code-Making Panel 4 and NEC CMP 2. He is currently a principle member of NEC CMP 15 and the NFPA 79 and NFPA 70E Committees. He is an IAEI and NFPA seminar instructor and has taught the NEC, NFPA 79, and NFPA 70E domestically and internationally for over 19 years.
In order to truly understand the implications of the changes to the measuring provisions of Section 210 in the 2020 National Electrical Code (NEC), one must go back and review how we arrived at that point.
In addition to home safety, electrical inspectors and other industry professionals can also work to promote workplace safety both at work and out in the field to keep their businesses healthy and safe.
Selective coordination ensures proper isolation and localization for all possible overcurrents (from overloads to maximum short-circuit currents at the point of application) to the nearest upstream overcurrent protective device and…