| | | | | | Ferroresonance can be worsened by poor system grounding — through either ineffective ground connections or high soil resistivity. The high voltage created on the primary system during the resonance could cause a rise in ground potential, which would have subjected sensitive equipment to voltages that could have exceeded insulation levels. |
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| | | In this episode of “EC&M Tech Talks,” Randy Barnett, a journeyman electrician, inspector, author, trainer, and electrical safety expert, reviews the installation requirements for generators in Art. 445 of the National Electrical Code. However, there is much more in the NEC to installing a generator than what is in Art. 445. The application of the generator... |
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| | | Check out the latest product innovations in motors, drives, motor controls, and power distribution equipment. The following seven slides include the latest offerings from ABB, Briggs & Stratton, Eaton, Generac Power Systems, Nidec Motor Corp., Rockwell Automation, and Siemens. |
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| | | In Episode 34, we highlight one of Randy Barnett’s popular EC&M Asks videos in an audio-only format. |
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| | | EC&M’s second industry compensation survey reveals pay increases and satisfying work don’t necessarily alleviate job-related stress for electrical professionals. |
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| | | Date: December 14, 2023 Time: 11:00 AM EST / 10:00 AM CST / 8:00 AM PST / 3:00 PM GMT Duration: 1 HourRegister Today!Already registered? Please click here to log in! A certificate of attendance will be offered.Summary:The electric vehicle (EV) market seems to be exploding and rapidly increasing the presence of EVs on the streets. This rapid increase... |
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| | | Without question, electrical equipment that has not been maintained properly or is not functioning properly poses a significant additional risk to those who are working on that equipment and its associated systems. NFPA 70E states that we must address and consider conditions of maintenance for applications (e.g., estimating the likelihood of severity... |
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| | | With the holiday fast approaching, here's a little trivia to see how well you know your Thanksgiving facts. |
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| | | In Episode 33 of EC&M On Air, EC&M Editor-in-Chief Ellen Parson sits down with four of this year’s Under 30 Electrical All Stars. Their conversation went so great that we decided to split it into two parts. In Part 1, Ellen introduces the guests: Luke Snow, Toth & Associates; Maria Ellis, M.C. Dean; Ian Smith, CDM Smith; and Jordan Emch, Oak Ridge ... |
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| | | In Part 2 of Episode 33, Ellen Parson continues her conversation with four of this year’s Under 30 Electrical All Stars. They discuss industry trends, learning from older generations while embracing new technologies/methods, challenges faced as a young leader in the electrical industry, and the best advice they have received. |
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| | | During a power quality inspection to evaluate the integrity of a critical communication UPS system, a discovery was made in one of the 125A panelboards. After evaluating the UPS installation, we proceeded to inspect all the downstream panelboards. |
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| | | Changing the tap on a transformer can solve a problem at the time, especially in the summer when electric utility voltages start to sag a bit due to high electricity demands. It’s a reasonable fix, whereby the process of changing the tap requires only de-energizing the facility for a brief period. |
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| | | In this episode of EC&M Code Conversations, Editor-in-Chief Ellen Parson and Code Consultant Russ LeBlanc talk about whether duct seal can be used to cover the supply-side terminals to comply with Sec. 230.62(C) barrier requirements. |
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| | | Take this quiz about holiday electrical fire facts and enter for a chance to win a $25 gift card to Amazon, iTunes, or Cabela’s! |
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