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 NEC cycle. 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 mjohnston@necanet.org.

Articles by Michael Johnston

March 2014
Energy management is becoming commonplace in today’s electrical infrastructures through the control of utilization equipment, energy storage and power production. Yet, limited consideration is found in electrical installation standards to actively manage these systems. READ MORE
February 2014
At a recent National Electrical Code (NEC) update seminar, 
I was asked about the new requirements to install a grounded (neutral) conductor in a box for switches that control lighting loads. READ MORE
January 2014
At some properties, a single electric utility service supplies multiple buildings or structures. The service could directly supply one of the buildings, and feeders or branch circuits supply other buildings from that service equipment. READ MORE
  • Figure 1: 10-foot feeder tap
December 2013
Someone recently asked me to explain the differences between the 10-foot tap rule and the 25-foot tap rule as they apply to feeders. An additional question was raised about connecting multiple taps to the same feeder using both the 10- and 25-foot tap rules. Using examples helps simplify the approach to properly applying the National Electrical Code (NEC) tap rules. 
 Conductor protection
 READ MORE
November 2013
This article is a continuation of a concise and complete review of some of the more significant changes that have been incorporated into the 2014 edition of the National Electrical Code (NEC). This segment takes a look at some significant revisions in chapters 4 through 6. READ MORE
November 2013
Many buildings and structures are supplied by power from a source other than a utility service. If the supply—such as a transformer or generator—is customer-owned, it is not a service and, therefore, is either a feeder or branch circuit. READ MORE
October 2013
Part I of this series reviewed some Code-wide revisions and some of the significant changes in Chapter 1 of the National Electrical Code (NEC). This segment takes a look at some significant revisions in chapters 2 and 3 (with the comment or proposal number cited after each listing). READ MORE
October 2013
Someone recently inquired about the proper wiring methods in a patient care location of a healthcare facility. A few factors relate to this determination. One of the first things is knowing the type of construction for the facility, since the wiring method must be suitable for use where it is installed. READ MORE
September 2013
It seems like just yesterday that the NFPA Standards Council issued the 2011 National Electrical Code (NEC). However, we’ve moved on to the next one; the 2014 edition was up for approval in August. Revising the NEC is a ton of work for the 19 technical committees during each three-year development cycle. The NEC is in a continuous revision process due to its inherent dynamics. READ MORE

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