Code Hunter — Annexes, 2014 NEC
The Questions To play this game, you need a sharp eye, a quick mind and a 2014 National Electrical Code book. (Fill-in-the-blank questions are looking for the exact word(s) used in the NEC.) 1) This...
View ArticleMaking the Jump: Bonding Basics
Belly Up: The Stark Reality When a contractor defaults on a building project, there are no winners. The contractor has lost his livelihood, reputation, and future ability to be trusted. The project...
View ArticleWhen is overcurrent protection required for current-carrying conductors?
This article will explore the need for overcurrent protection for current-carrying tap conductors. CE Code Rule 14-100 requires overcurrent protection where a conductor receives a supply of current and...
View ArticleMedical Grade Strip Requirements, an Overview
Due to the many safety standards that apply to medical grade power strips, identifying the correct set of standards for a patient care application can be burdensome. This article will attempt to...
View ArticleQuestions from the Field: We are seeing many more supply-side PV Systems
PV system prices continue to drop, the 30% Federal Investment Tax Credit has been extended for another three years, and PV modules and inverters continue to increase in size. Inspectors are seeing more...
View ArticleDesign, installation, and inspection of fire alarm system audible signal...
Requirements for audibility of a fire alarm system (FAS) are governed by Article 3.2.4.19. of the National Building Code of Canada (NBCC). So, why is this subject being discussed in a purely electrical...
View ArticleUL Question Corner: Are there “UL Authorized” Service People?
Are there “UL Authorized Service People” who can modify UL Listed equipment in the field with no need of a UL field inspection or a field evaluation? Answer No. See the Guide Information for...
View Article100% vs 80%: Choosing the right OCPD solution
We make decisions every day, both personally and professionally, with our checkbook in mind. When decisions are made to “value engineer” or cost out a design to save money on a project, attention is...
View ArticleHow electricians test continuity of protective conductors
For all protective conductors, including main and supplementary bonding conductors, electricians must perform a continuity test using a low-reading ohmmeter. For main equipotential bonding, there is no...
View ArticleInspecting Power Generating Substations
I remember many years ago working at a nuclear generating facility and being surprised that there was very little of the NEC being applied to the installation. It was mostly engineered design utilizing...
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