| | | | | | Equipment that fails without warning can hide a deeper issue: electrical transients. This article walks through a real-world investigation, showing contractors how to detect these hidden power quality problems and apply targeted solutions before they cause costly downtime. |
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| | Sponsored | | Our solenoid interlock door prevents access to temporary cable connections while the unit is energized, preventing access to connection points while the unit is under load. Access is allowed in the breaker section for monitoring, adjustments or service as needed via the secondary door. When the cables are de-energized, the lock is disengaged, and users can now safely remove or install their cables. |
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| | | | This article explores the design and importance of emergency automatic power transfer systems in mission-critical facilities like hospitals, emphasizing the need for proper testing, maintenance, and staff training to prevent catastrophic failures during outages. |
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| | Sponsored | | METSyS is a true RMS current-only data logger, no voltage hookup needed. Ideal for NEC 220.87 studies, breaker/circuit evaluations, and troubleshooting, it’s portable, affordable, and ready in minutes. Small, flexible Rogowski coil current sensors and a mobile app make setup fast, safe, and easy. Made for jobs where you need current data quickly and safely. |
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| | | | In this EC&M Tech Talk Randy Barnett discusses in five different sections the concepts and rules of overcurrent protection. Overcurrent protective devices include the fuses and circuit breakers installed to open circuits in the event of a short circuit or ground fault. Operation of electrical equipment above its rating is an overload. |
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| | Sponsored | | For electrical contractors, among the highest priorities is balancing complex project needs while addressing customer expectations. Solutions such as integrated switchboard displays and mobile apps can simplify commissioning, reduce complexity, and help meet customers’ expectations. As a global technology leader in electrical distribution and management... |
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| | | In this episode of EC&M Code Conversations, Editor-in-Chief Ellen Parson and Code Consultant Russ LeBlanc contemplate a common concept that can sometimes cause confusion. When is ampacity not really ampacity? |
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| | Sponsored | With a special focus for electrical professionals, the Facilities Expo has solutions for any building challenges you might face. Here you will learn from industry experts, network, and explore our solution packed exhibitor floor—all for free! |
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| | | Branch-circuit failures are one of the most common causes of electrical trouble calls in both residential and commercial settings. Learn how to identify and fix issues like short circuits, ground faults, and overloads with expert troubleshooting tips and Code-compliant maintenance practices. |
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| This photo gallery offers a sneak peek at the companies making it into the Top 20 out of 50 spots, listed in descending order and based on their 2024 electrical sales data. Find out more about the driving forces behind the key players in the electrical contracting business. |
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| A facility recently transferred from their temporary power feed to a new permanent feed. The facility’s hydraulic pump ran smoothly when connected to the temporary feed, along with other construction equipment. However, when the pump was connected to the new switchgear, it would no longer start. |
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| | | For this “Members Only Quiz”, we decided to test your NEC knowledge on grounding and bonding performance requirements. This is an important and popular topic for our readers. The five-question quiz offers a chance to either learn more about these requirements or to refresh yourself. |
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| Power quality primarily encompasses short-duration events on the electrical system that cause equipment to misoperate or shutdown. The time delineation between a power quality event and a steady-state condition is 1 min. |
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| From scheduled shutdowns to emergency repairs, understanding the distinct risks of planned vs. unplanned maintenance is key to safe execution. And when you find yourself “in the moment,” take a few minutes to step back and slow down to think things through and get a renewed view of the big picture. |
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