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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.
| Conductor Jamming—Chapter 9, Table 1, Note 2 |
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, 265 KB)
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Click on the image above to watch the video
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Have you ever been pulling three-feeder conductors into an EMT raceway and half-way through, it suddenly jams, won’t go any further, and won’t easily come back out? Your first thought might be to pull back a bit and then try again, only to discover that it jams again! You assume that something is blocking the raceway or that there isn’t enough lube so you pull the conductors out of the raceway, make some adjustment to the head or blow out the conduit and try again only to have it jam in a different place! What if I told you that there is less likelihood of a four (or more) conductor pull jamming than three, or that a larger raceway can increase the likely hood of jamming?
Read the attached PDF, study the graphic, and join Mike and a panel of experts as they discuss how raceway size and the number of conductors you install can impact your ability to install conductors in a raceway.
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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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