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The electrical grid as we know it hasn’t changed much in the last 100 years, but we have changed as a society and so has the technology we use. According to SmartGrid.gov, today’s national grid has “more than 9,200 electric generating units with more than one million megawatts of generating capacity connected to more than 300,000 miles of transmission...
UL Question Corner
Q. I know cord and plug-connected appliances are tested for leakage current but are hard-wired appliances tested for leakage current, as well? A. No. Typically, safety standards only require cord and plug-connected appliances to be tested for leakage current. Permanently-connected (hard-wired) appliances are not required...
Nature preserve features advanced clean-energy microgrid
One of the most advanced microgrids in North America can be found at Bubolz Nature Preserve in Northeast Wisconsin. Faith Technologies CEO Mike Jansen initiated the project at the preserve and launched a microgrid that incorporates as many as five distributed energy resources (DERs) into one power production facility. The microgrid serves as a research and development project as...
Code Hunter
The Questions To play this game, you need a sharp eye, a quick mind and a 2017 National Electrical Code book. (Fill-in-the-blank questions are looking for the exact word(s) used in the NEC.) 1) GFCI protection shall be provided for outlets not exceeding __________ volts that supply boat hoists installed in dwelling unit locations. A) 120 B) 125 C) 150 D) 240 2) Ground-fault circuit-interrupter protected receptacles...
UL Question Corner
Q. Recent legislative changes in my state have resulted in many indoor horticultural grow operations. Does UL certify (list) grow lights and plant oil extraction booths that specifically address the hazards that may be associated with these grow operations? A. Yes, UL does certify (list)...
How secure is the national electrical grid?
Once upon a time, a long time ago—159 years ago to be exact—the sun spewed a solar flare that hit the earth. It was known as the Carrington Event, named after the English astronomer who observed a coronal mass ejection (CME) leaving the sun. The result of the impact was seen most prominently through the telegraph system, where lines...
IAEI Point in time
Those of you who attended the section meetings in 2018 know that this association has been in operation for 90 years. Our first International Office was in Chicago, and we moved to our current location in Dallas in 1992. While we have made good use of the building for nearly 30 years, it was deteriorating. We did...
IAEI News January/February 2019 issue
While members have already received their copy of the January/February issue, we often have requests for single issue copies.Get your copy (or copies to share) today.
UL Question Corner
Q. Do wire connectors used to make line side splices or taps need to have a short circuit current rating (SCCR)? If I use a power distribution block for line side conductor terminations does it need a SSCR? What is the difference? A. Wire connectors that connect...
UL Question Corner
Do wire connectors used to make line side splices or taps need to have a short circuit current rating (SCCR)? If I use a power distribution block for line side conductor terminations does it need a SSCR? What is the difference? Wire connectors that connect conductors of the same polarity or phase on the line side of the service are...
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