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Keeping up with the requirements of the Code should be the goal of
everyone involved in the electrical industry. The following is what I feel is an
important rule in the 2020 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.
| Motor Full-Load Current and Motor Nameplate Current Rating [430.6(A)] |
The content below is extracted from Mike Holt's Electrical Exam Preparation textbook, based on the 2020 NEC
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Click here or on the thumbnail to the left to view or download the PDF of this rule. (2 pages, 287 KB)
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Click on the image above to watch the video
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Article 430 (Motors) is pretty complicated and provides many opportunities to make errors when determining motor short-circuit, ground-fault, and overload protection, or when sizing conductors. Motors have a nameplate current rating (FLA) but they also have horsepower and voltage ratings which are used for determining the current ratings (FLC) found in the tables in the NEC.
If you wonder what you should do with all these numbers, join Mike and his panel of Code experts as they explain how to properly size motor overloads, short-circuit and ground-fault protection, and conductors.
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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 a month from now, and
please share with your colleagues. |
This content is extracted from Mike Holt's Illustrated Guide to
Electrical Exam Preparation, based on the
2020 NEC Program.
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