Mar
17 | Code WatchKeeping an eye on your most important electrical standard | |  | | |
Members Only |  PREMIUM CONTENT: In this video, Russ shows us a violation of Sec. 230.28 in the 2020 NEC. The Code specifically states that only power service drop or overhead service conductors can be attached to a service mast. |
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|  Test your knowledge of the NEC with this challenging quiz question from NEC consultant John Lupacchino. What is the minimum number of receptacles required at a patient bed location in a Category 1 (Critical Care) space? |
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|  Suspended ceilings in commercial buildings have grown in purpose and importance over the past few decades. Today, even the lighting is going the low-voltage route due to LED lighting technology. To prevent a hodgepodge of power supplies and a bird’s nest of wiring, manufacturers started building low-voltage power distribution systems. The key to getting a good layout is planning. |
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|  Often used and frequently misapplied, the rules for tapping feeders (NEC Sec. 240.21) continue to confuse many installers. First and foremost, it’s important to recognize these rules do not apply to service conductors and other conductors that do not meet the definition of a feeder as outlined in Art. 100. |
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|  As your career advances, it’s crucial that you understand how to properly perform basic branch-circuit calculations and select appropriately sized branch-circuit conductors. You must also know how to size service feeder conductors and overcurrent protective devices. These skills are necessary when you start performing commercial service calculations. |
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|  Fill in the blank. Hallways in dwelling units that are _____ ft long or longer require a receptacle outlet. |
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|  As an electrical industry, we are being called upon to build an EV charging infrastructure that is functional, sustainable, and installed based on current codes to produce the safest possible installation that protects all consumers. The backbone behind this infrastructure will be based upon the installation of the EV chargers themselves. |
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|  Test your NEC knowledge with these questions from NEC Consultant Mike Holt regarding Code requirements for sizing conductors that feed an adjustable-speed drive system. |
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|  Russ shares a photo of a mess from an RV park in the mountains of Upper East Tennessee. In another example, Russ looks at some conduit exposed along a roadbed on a vineyard road in Northern California. |
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|  As climate change raises temperatures and produces more extreme storms, regions previously unaccustomed to lightning activity are now experiencing greater number of strikes. Potential for damage is particularly concerning for high-rise critical facilities (like hospitals) in regions where most existing buildings do not have a lightning protection system (LPS). Left unprepared, a power surge could pose serious risks to patient care. |
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Members Only |  PREMIUM CONTENT: The definition of ampacity appears in Art. 100 of the National Electrical Code. In this Tech Talk video, ampacity is explained through an example as the definition in the NEC is examined. The three conditions of use identified in Art. 310 are important when it comes to determining ampacity values. First, the location of the wiring method can affect insulation properties. |
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|  How well do you know the Code? Think you can spot violations the original installer either ignored or couldn’t identify? Hint: Squeeze Play |
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|  Test your knowledge of the NEC with this challenging Q&A from Code Consultant Mike Holt. What are the Code rules for disconnecting means and emergency shutdown of standby generators in one- and two-family dwelling units? |
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Members Only |  Test your basketball knowledge and enter for a chance to win a $25 gift card to Amazon, iTunes, or Cabela’s! |
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