Shallow Wall Cavity for Junction Boxes, Cut Back of Boxes or Surface Mount?

Discussion in 'Electrical Forum discussion & Blog' started by molo, Nov 10, 2012.

  1. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    Many of the panelized homes also use connectors to join various sections together. No idea why they allow it there, but it would be nearly impossible to build it in a factory otherwise. Doing it on-site defeats some of the purpose of factory built. My guess is that the location and conditions of when they are used when built in a factory may be more well defined rather than random in a stick built house.
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona
    RVs and mobile homes are under a completely different set of codes than houses. Modular homes which come in sections are usually considered under the mobile home codes, (governed by the county building department in this area), much to the consternation of local building departments. For example, "houses" in this area require fire protection systems, but modular homes, which look exactly the same after they are finished, do not because mobile homes do not need them.
  3. cacher_chick

    cacher_chick Test, Don't Guess!

    Jan 5, 2008
    Test, Don't Guess!
    Land of Cheese

    Anytime NM cable is being used, it must be secured within 12" of the box.
  4. jwelectric

    jwelectric Electrical Contractor/Instructor

    Jun 14, 2007
    North Carolina
    (B) Unsupported Cables. Nonmetallic-sheathed cable shall be permitted to be unsupported where the cable:

    (1) Is fished between access points through concealed spaces in finished buildings or structures and supporting is impracticable.

    (2) Is not more than 1.4 m (4½ ft) from the last point of cable support to the point of connection to a luminaire or other piece of electrical equipment and the cable and point of connection are within an accessible ceiling.
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