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Keeping up with the requirements of the Code should be the goal of
everyone involved in electrical safety. The following is what I feel is an
important rule in the 2023 NEC®, complete with
graphics and a video. I encourage you to use it as a training resource for
your organization, and share it with your colleagues.
The content below is extracted from Mike Holt's Electrical Calculations video program, based on the 2023 NEC.
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Click here or on the thumbnail to the left to view or download the PDF of this rule. (5 pages, 791 KB)
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Click on the image above to watch the video
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To determine what size feeder is needed to carry a certain amount of current, the temperature rating of the conductor and associated terminals must be taken into consideration.
Factors that impact feeder sizing include conductor ampacity, equipment terminal temperature rating, continuous load factors, overcurrent protection requirements, conductor insulation temperature rating, ambient temperature corrections, and conductor bundling adjustment.
At first glance all of this may seem a bit overwhelming, but it will fall into place if you take the time to read the attached text and watch the video where Mike and the team discuss feeder conductor sizing.
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For more information on this topic, get a copy of Mike Holt's Electrical Calculations Video Program, based on the 2023 NEC.
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We'd
love to hear from you about this series, and the ways you're using it.
Send us your comments and feedback by clicking on "Post a Comment"
below. Look out for the next part in this series about a month from now, and
please share with your colleagues. |
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