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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.
| Voltage-Drop - Manufacturer and NEC Recommendations [210.19(A) Note 3, 2020 NEC] |
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. (4 pages, 187 KB)
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Click on the image above to watch the video
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Excessive voltage drop can result in delivering a voltage to equipment that is less than it needs to operate correctly. Industry standard ANSI C84.1 states the minimum voltage at equipment should not be less than 90 percent of the nominal system voltage and NEC 110.3(B) requires us to follow the equipment manufacturer’s instructions to determine the acceptable operating voltage range.
There is a lot to unpack here regarding voltage drop considerations, so remember each installation is different and your unique circumstances must be considered.
To find out more about voltage drop and equipment operating voltages, read the attached text then join Mike and the team as they discuss these topics in detail in the video.
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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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