Michael Johnston

Executive Director of Standards, NECA

Michael Johnston is NECA’s executive director of standards and safety. He is chair of the NEC Technical Correlating Committee. He served as a principal representative on NEC CMP-5 representing IAEI for the 2002, 2005, and 2008 cycles and is currently the chair of CMP-5, representing NECA for the 2011, 2014 and 2017 NEC cycles. Mike is a member of the IBEW and has experience as an electrical journeyman wireman, foreman and project superintendant. Mike worked for the International Association of Electrical Inspectors (IAEI) as the director of education, codes and standards for almost 10 years. He also worked as an electrical inspector and electrical inspection field supervisor for the city of Phoenix, Ariz. Johnston is an active member of IAEI, the NFPA Electrical Section, Education Section, the UL Electrical Council, and National Safety Council. Reach him at mj@necanet.org.

Articles by Michael Johnston

November 2014
What does the National Electrical Code (NEC) require when installing isolated/insulated grounding-type receptacles and auxiliary grounding electrodes? Some manufacturers threaten to void warranties unless equipment is connected only to a driven ground rod and not the branch-circuit equipment grounding conductor. This article provides clarification regarding this misinformation. READ MORE
October 2014
The 2014 National Electrical Code (NEC) has new requirements for field-applied hazard warning markings, signs and labels. Throughout the NEC, rules that required signs, labels and other markings also required a specific signal word be included in the sign, label or marking. READ MORE
September 2014
In a recent training presentation, a question came up about the new identification requirements for automatically controlled receptacles. Does the marking need to be on the receptacle face, or is a marking on the faceplate in compliance? Let’s look at these new requirements and the rules that apply. 
August 2014
Traditional construction methods and techniques have evolved to be more efficient and cost-effective. Technology affords the construction industry the ability to model projects remotely and prefabricate many of the construction elements off-site. READ MORE
July 2014
Grounding electrode conductor connections are an important part of any electrical safety system. These connections ensure the path to ground through any of the grounding electrodes identified in Section 250.52(A). At a recent training session, several questions came up about grounding electrode conductor connections to electrodes. Do they always have to be accessible? Do they have to be listed? READ MORE
June 2014
An electrical contractor recently requested information about the required emergency disconnects for a motor-fuel-dispensing facility. The questions related to whether the emergency power off (EPO) had to disconnect the neutral (usually the grounded conductor) in addition to all the circuit conductors feeding the dispensers and fuel pumps. READ MORE
  • The NEC requires an effective ground-fault current path for medium- and high-voltage services.
May 2014
Part X of Article 250 in the National Electrical Code (NEC) provides the grounding requirements for systems and circuits of greater than 1,000 volts (V). There are various methods to accomplish the grounding required for medium- and high-voltage systems, and Part X also includes important rules for grounding medium-voltage cable shields. READ MORE
May 2014
During a recent training program on the National Electrical Code (NEC), a question arose about panelboards and whether they could be installed in a horizontal orientation rather than vertically. This has come up often, probably due to various home-improvement broadcasts that are produced in Canada. READ MORE
April 2014
Recently, a question came up regarding installing overcurrent protection for dry-type transformers rated less than 1,000 volts (V). The transformer installation is a 150-kilovolt-ampere, three-phase unit with a 480V primary and a 208Y/120V secondary. The transformer is being installed in a mechanical room, and the ambient temperature in the room will normally be kept at or below 86°F. READ MORE