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http://www.cooperindustries.com/content/dam/public/bline/Resources/Library/catalogs/fasteners_and_fixing/spring_steel_fasteners_NA/NECRequirements.pdf
* Note: Local codes may override certain requirements of the National Electrical Code ... Support wires that do not provide secure ... intermediate metal conduit, or rigid nonmetallic conduit having a length not exceeding 3.05 m. NEC Requirements
https://www.electrical-knowhow.com/2013/06/conduit-fittings-and-supports.html
Rigid metallic conduit and electrical metallic tubing both require support. Conduit should be fastened by straps to the ceiling or wall, or supported on hangers from the ceiling at least every 10 feet (Figure 11). Conduit should be fastened within 3 feet of a box (5 feet of unbroken lengths are allowed if structural members do not permit fastening within 3 feet).
https://www.ecmweb.com/cee-news-magazine-archive/article/20894958/code-guide
Generally, the maximum support spacing requirement for RMC (rigid metallic conduit) of trade size 1 is 10 ft, but for straight runs with threaded couplings, this spacing is increased to 12 ft. Nothing in the NEC states that you cannot use the same supports for conduit as for other systems.
https://www.ecmag.com/section/codes-standards/article-370-boxes-conduit-bodies-and-fittings
A conduit body, not exceeding 100 cubic inches in size, can be supported by either rigid metal or intermediate metal conduit, when the installation complies with Section 370-23(e). A 1-inch, Type C conduit body, less than 100 cubic inches in size, is installed between two block walls.
http://wiresizecalculator.net/tables/conduitsupportstable.htm
These tables list the maximum distance between conduit supports for rigid metallic and non-metallic conduit. Supports for Rigid Metallic Conduit Source: NFPA 70, National Electrical …
https://www.jadelearning.com/blog/securing-and-supporting-cables-and-raceways-2/
Jun 21, 2016 · PVC must be supported every 3 ft. for trade sizes ½ inch through 1 inch. The support distance increases as the conduit size gets larger. For example, 2 inch PVC conduit can be supported every 5 ft; 6 inch PVC conduit can be supported every 8 ft. See Table 352.30. PVC conduit is subject to thermal expansion or contraction.
https://www.ecmweb.com/national-electrical-code/code-basics/article/20896214/2011-nec-revisions-for-boxes-conduit-bodies-and-handhole-enclosures
The requirements for sizing boxes and conduit bodies containing conductors 6 AWG and smaller are contained in 314.16. If conductors 4 AWG and larger enter a box/other enclosure, a fitting that provides a smooth, rounded, insulating surface, such as a bushing or adapter, is required to protect conductors from abrasion during/ after installation [300.4(G)].
https://www.nvenergy.com/publish/content/dam/nvenergy/brochures_arch/account-services/building-and-new-construction/electric-service-standards-north/section-4/CD0001U.pdf
Conduit protection (primary/ secondary), on property line of private property, will require a concrete encasement of the conduit. 9.2 Trenches should be backfilled when conduit is laid. Conduit should not be left exposed in an open
https://steeltubeinstitute.org/steel-conduit/resources/installation-guides/support-raceways/
Steel conduit / tubing run through openings in metal or wood studs: Such openings can be used for support where the openings are no more than 10 feet apart. Secure fastening at termination points is still required.
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