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IAEI Magazine | Author: George Gregory
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George Gregory

George Gregory is manager of Industry Standards, Square D Company, Cedar Rapids, Iowa. He is a registered P. E. in Iowa, Illinois and Puerto Rico. He is chair of the NEMA Circuit Breaker Section, chair of IEEE Power Systems Protection Committee and has been an associate member of IAEI since 1972. He also serves on NEC Panel 10 representing NEMA.


The Truth About AFCIs, Part III

Is it a requirement that AFCIs be installed at the time of an electrical service change or upgrade to an existing installation? The enforcement of the AFCI requirements is a common question that must be communicated by the authority having jurisdiction. New dwelling construction or the addition of a bedroom is being consistently enforced as requiring AFCI protection of the branch circuit. The two questions that arise are: 1) Is AFCI required for the addition of an outlet in an existing bedroom? 2) Is the AFCI protection required when a service change / upgrade occurs and the protection of those branch circuits are re-inspected?

The Truth About AFCIs (Part 2)

AFCIs are not new, but they are newly applied under the NEC rules. A variety of questions have arisen regarding where they must be applied, whether to expect unwanted operation, and how to test and service installations. This part of the two-part article answers some of those questions.

The Truth About AFCIs (Part 1)

Arc-fault circuit interrupters (AFCIs) have just become required for installation in residences under the 2002 National Electrical Code (NEC). Not surprisingly, questions have been raised regarding their application and even the need for them. There have been marketing pitches, technical opinions and, quite frankly, intentional misinformation floating around various industry channels. The intent of this article is to bring out the truth about what AFCIs are and what they are not.

Overcurrent Protection and the NEC

The fundamental purpose of overcurrent protection is to protect conductors and equipment against the effects of excessive temperature on conductors and conductor insulation from overcurrent.

Arc Detection with the AFCI

The arc-fault circuit interrupter (AFCI) is emerging as a new device in the National Electrical Code and in residential installations to enhance electrical safety. New technology generally fosters questions and concerns about the workings and application of the technology and this article will address some of the most frequently asked questions surrounding AFCI...