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https://www.reynoldsonline.com/ASSETS/DOCUMENTS/ITEMS/EN/EGSMS40002_Spec.pdf
Code reads as follows: 300.19 Supporting Conductors in Vertical Raceways. (A) Spacing Intervals - Maximum. Conductors in vertical raceways shall be supported if the vertical rise exceeds the values in Table 300.19(A). One cable support shall be provided at …
https://iaeimagazine.org/magazine/features/vertical-mc-cable-support-in-the-2014-nec/
For vertical installations, any listed MC cable is allowed to be secured at 10 foot intervals (rather than the 6 foot interval required in the 2011 NEC) as long as the cable contains ungrounded conductors 250 kcmil or larger. Note that the language says that the MC cable must be listed, not “listed for the purpose.” UL 1569 is the product ...
https://www.electriciantalk.com/f30/installing-vertical-feeders-43612/
Sep 22, 2012 · Specifically, we need to install (4)x250 mcm cables into a vertical conduit that rises over 100 feet from the basement to the top floor of a building. We have determined to install two of those wire support fittings in the conduit run, and a third one at the junction/pull box on the top floor.
https://catalog.pecoelect.com/item/rigid-conduit-fittings-steel/cable-support-wedges/cs-150pt1
In accordance with the National Electric Code, conductors in conduit risers are to be supported whenever their vertical rise exceeds the value set forth in Table 300-19(a). The cable should be secured by a clamping device using an insulated wedge inserted in the end of the raceway as close to the top of the rise as practical.
https://allstarce.com/wp-content/uploads/2016/12/2017-NEC-Code-Ch-3-Article-300-2.pdf
300.19 Supporting Conductors in Vertical Raceways. (A) Spacing Intervals — Maximum. Conductors in vertical raceways shall be supported if the vertical rise exceeds the values in Table 300.19(A). At least one support method shall be provided for each conductor at the top of the vertical raceway or as close to the top as practical.
https://www.ecmweb.com/national-electrical-code/quizzes/article/20904435/code-quiz-supporting-conductors-in-vertical-raceways
Explanation: Section 300.19(A) requires support of conductors in vertical raceways if the vertical rise exceeds the values shown in Table 300.19(A). Additional intermediate supports are required to limit supported conductor lengths to not greater than those values specified in Table 300.19(A).
https://www.electrical-contractor.net/forums/ubbthreads.php/topics/1196/Conductor_support_in_vertical_.html
May 02, 2001 · We are running 3" rigid conduit for a 200HP motor located on top of a grain elevator. The vertical rise is about 180', the conductors will be 500mcm THHN, pull boxes every 50'. How would you support the conductors in the pull boxes?? In the past I've used kellum grips, but I've...
https://www.emerson.com/documents/automation/catalog-o-z-gedney-cable-supports-o-z-gedney-en-588862.pdf
raceway contains 4/0 copper conductors. Per Table 300.19(A), the unsupported cable length cannot exceed 25 m (80 ft). Therefore, one cable support is required at or near the top of the vertical riser, and one intermediate support is required at or near the midpoint in …
https://castlepowersolutions.biz/Components/O-Z%20Gedney/Cable%20Supports.pdf
raceway contains 4/0 copper conductors. Per Table 300.19(A), the unsupported cable length cannot exceed 80 feet. Therefore, one cable support is required at or near the top of the vertical riser, and one intermediate support is required at or near the midpoint in the conduit run, assuring that any unsupported cable length does not exceed 80 feet.
https://forums.mikeholt.com/forum/active-forums/nec/8179-supporting-conductors-in-vertical-raceways
300.19 covers Supporting Conductors in Vertical Raceways. I am interested in finding out if there are any reported cases where the conductors in a raceway that were fed from the top floor down to the equipment in the basement, have slipped because of the lack …
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