|  | | | | | In last month’s column, I addressed the question of what harmonics is and why you should care. In this installment of our multi-part series on power quality topics, we’ll move on to how to identify, monitor, diagnose, and deal with harmonics in electrical power systems. |
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| | | Just how well do facility managers understand power surges and surge protective devices (SPDs), otherwise known as transient voltage surge suppressors (TVSSs)? According to a survey conducted by the Electrical Safety Foundation International (ESFI) and National Electrical Manufacturers Association’s (NEMA) Low Voltage Surge Protective Devices Section... |
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| | | In Episode 14 of “EC&M Asks,” a video series featuring subject matter experts (SMEs) answering reader-submitted questions regarding popular electrical topics, Ron Widup, vice chairman, board of directors, and senior advisor of technical services for Shermco Industries covers bus duct basics. He addresses the basic construct of a bus duct, how to avoid... |
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| | | The figures contained in this article show how the voltage level in a facility was affected by a fault condition that occurred on an electric utility feeder that is adjacent to the utility feeder serving the facility. The unexpected disturbance resulted in a voltage unbalance on the facility’s 3-phase electrical system. |
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| | | The U.S. Occupational Safety and Health Administration’s (OSHA) Acting Director of OSHA's Directorate of Enforcement Programs Patrick Kapust presented OSHA’s Top 10 most frequently cited safety standards for 2022. Announced on Sept. 20, 2022 during the 2022 National Safety Council (NSC) Safety Congress & Expo, the list remains relatively unchanged ... |
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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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| | | It's that time of year again — time to reveal EC&M's highly anticipated Top 40 electrical design firms list for 2023, ranked specifically by electrical design revenue earned in 2022. This photo gallery offers a sneak peek at the companies making it into the top 10 spots, listed in descending order. |
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| | | As more electric vehicles hit the road, more drivers seem to be hitting a wall with the battery charging experience. Media coverage and studies of the problem of malfunctioning charging stations have been growing, feeding the narrative that electric vehicles aren’t ready for prime time. And that’s a potentially critical issue given commitments that... |
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| | | In this episode of EC&M Code Conversations, Editor-in-Chief Ellen Parson and Code Consultant Russ LeBlanc discuss the evolution of bathroom branch circuit requirements in the NEC and the confusion this subject has caused over the years. |
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| | | This gallery features new product innovations in metering and monitoring equipment. Click through the following four slides to see the latest products, including a fire alarm system, power quality meter, data acquisition server, and more. |
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| | | A snapshot of which U.S. states rank highest when it comes to mass adoption and preparedness of electric vehicles |
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| | | In Episode 21, we highlight an audio-only version of a popular training video featuring reader Q&A’s. In case you missed it, this content was originally brought to you in our EC&M Asks Q&A video series. This week, we’re featuring subject matter expert Randy Barnett, who addresses some of our readers’ most pressing questions about grounding and bonding... |
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| | | Case study demonstrates the importance of looking before you leap when investigating PQ problems. The operator of a large solar farm was experiencing nuisance interruptions, causing significant downtime. Read on to see what the power quality investigation uncovered. |
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| | | Test your knowledge of the NEC with this challenging quiz question from NEC Consultant John Lupacchino. True or false? A receptacle located within 6 ft of the top of an aquarium located in an office building requires GFCI protection. |
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| | | One of the most often mentioned and misunderstood power quality issues we see with commercial, industrial, and power-generating electrical equipment is harmonics. This is Part 1 of a multi-part series to discuss how to identify, monitor, diagnose, and deal with harmonics in large electrical systems. |
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| | | Take this quiz about grounding/bonding basics and enter for a chance to win a $25 gift card to Amazon, iTunes, or Cabela’s! |
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