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Wednesday, May 24, 2017

Monthly Archives: July 2016

Inspecting 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...

How 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,...

Don’t Worry About Arc Flash: Control IT!

At some point in our life we have all heard, or perhaps stated, variations of the common phrase, “Don’t worry about things you can’t...

100% 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...

UL 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...

Design, installation, and inspection of fire alarm system audible signal devices — consistency of...

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...

UL Question Corner: Generator Enclosures

I have a typical UL 2200 Listed generator installation set on a concrete pad. The generator has an overall enclosure, and inside that enclosure...

Section Meetings: August 21 through October 12

Holy Mackerel! It seems like only a few months ago that we attended the IAEI Section meetings. Where does the time go? As we prepare...

Questions 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...

Medical 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...
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