SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/elec-nm-12in

NM cable must be secured within how far of an outlet box or fitting?

Within 12 inches of the box.

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  1. 24 inches
  2. 12 inches ✔
  3. 4.5 feet

Why: Section 334.30 requires NM cable to be supported within 12 inches of every box, cabinet or fitting. After that it is supported at intervals.

Huh, didn't know that: Electricians often call NM cable Romex, a brand name.

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References

Answer: 12 inches. Section 334.30 requires NM cable to be supported within 12 inches of every box, cabinet or fitting. After that it is supported at intervals.

  1. EC&M: Moving Violations Video No. 136, Improper Cable Support www.ecmweb.com/moving-violation-videos/moving-violations-video-no-136-improper-cable-support
    Type NM and Type AC cables shall be supported within 12 in. of the enclosure
    Checked 2026-10-10.

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