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Thread: IBC - Residential Requirement

  1. #1
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    IBC - Residential Requirement

    Im doing some research on a failed inspection. The inspection notes do not reference the NEC, but instead reference the IBC, Electrical chapter which I assume is very similar to the NEC.

    The inspection comment says;

    "E3406.11.3 Length of conductor for splice or termination.
    Where conductors are to be spliced, terminated or connected to fixtures or devices, a minimum length of 6 inches (152 mm) of free conductor shall be provided at each outlet, junction or switch point. The required length shall be measured from the point in the box where the conductor emerges from its raceway or cable sheath. Where the opening to an outlet, junction or switch point is less than 8 inches (200 mm) in any dimension, each conductor shall be long enough to extend at least 3 inches (75 mm) outside of such opening."


    Does anyone know if this requirement appears in the NEC? Im assuing this is saying that a minimum of 6" of slack shall be provided for every receptacle & luminaire or other similar junction.

    Any thoughts would be appreciated.

  2. #2
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    Yes, 300.14.

    The IBC references the NEC.

    The IRC is residential.
    "Electricity is really just organized lightning." George Carlin


    Derek

  3. #3
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    Your post heading is a little confusing. The IBC is intended for non-residential construction, except for R-1, R-2, and R-4. Classification R-3 is for one and two family detached dwellings, and a few others that would otherwise be another R except for the limited number of occupants. The IRC says in its title "For One- and Two-Family Dwellings". So, which do you have? Or does your jurisdiction use the IBC for all R occupancies?

  4. #4
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    For comparison:

    2014 NEC:
    300.14 Length of Free Conductors at Outlets, Junctions, and Switch Points. At least 150 mm (6 in.) of free
    conductor, measured from the point in the box where it emerges from its raceway or cable sheath, shall be left at
    each outlet, junction, and switch point for splices or the connection of luminaires or devices. Where the opening to an
    outlet, junction, or switch point is less than 200 mm (8 in.) in any dimension, each conductor shall be long enough to extend
    at least 75 mm (3 in.) outside the opening.
    Exception: Conductors that are not spliced or terminated at the outlet, junction, or switch point shall not be required
    to comply with 300.14.
    From OP:

    "E3406.11.3 Length of conductor for splice or termination.
    Where conductors are to be spliced, terminated or connected to fixtures or devices, a minimum length of 6 inches (152 mm) of free conductor shall be provided at each outlet, junction or switch point. The required length shall be measured from the point in the box where the conductor emerges from its raceway or cable sheath. Where the opening to an outlet, junction or switch point is less than 8 inches (200 mm) in any dimension, each conductor shall be long enough to extend at least 3 inches (75 mm) outside of such opening."
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

  5. #5
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    Thanks Everyone.

    The IBC was cited but its IBCR (Residential).

  6. #6
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    Quote Originally Posted by Npstewart View Post
    Thanks Everyone.

    The IBC was cited but its IBCR (Residential).
    Here's the section from the 2009 IRC, which is the latest I have access to. The wording is the same in the 2015 edition, but the section number is E3406.11.3

    E3406.10.3 Length ofconductor for splice or termination.
    Where conductors are to be spliced, terminated or connected
    to fixtures or devices, a minimum length of 6 inches (152
    mm) of free conductor shall be provided at each outlet, junction
    or switch point. The required length shall be measured
    from the point in the box where the conductor emerges from
    its raceway or cable sheath. Where the opening to an outlet,
    junction or switch point is less than 8 inches (200 mm) in any
    dimension, each conductor shall be long enough to extend at
    least 3 inches (75 mm) outside of such opening.

  7. #7
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    IBC does not list ecodes like the IRC.

    It only has chapter 27, section 2701 and 2702. 2701 just says see NFPA 70(NEC)

    IRC has chapters 27-43. and lists codes as exxxx.x, so it is easy to spot an IRC reference.
    "Electricity is really just organized lightning." George Carlin


    Derek

  8. #8
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    Quote Originally Posted by Npstewart View Post
    Im assuing this is saying that a minimum of 6" of slack shall be provided for every receptacle & luminaire or other similar junction.

    Any thoughts would be appreciated.
    Using NM cable as an example it means as long as the box is no deeper than 3 in. you would remove 6 inches of the cable sheath to comply

  9. #9
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    Quote Originally Posted by david View Post
    Using NM cable as an example it means as long as the box is no deeper than 3 in. you would remove 6 inches of the cable sheath to comply
    If you had a RACO new work metal box, model 8232, the depth is 2.125 inches. Assuming that you enter the box dead center of the wall, you have 1.0625 inches to the edge of the box. You could trim the conductors to a length of 4.0625 (say 4-1/2" to be safe) and meet the requirement of the section.

  10. #10
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    Quote Originally Posted by gadfly56 View Post
    If you had a RACO new work metal box, model 8232, the depth is 2.125 inches. Assuming that you enter the box dead center of the wall, you have 1.0625 inches to the edge of the box. You could trim the conductors to a length of 4.0625 (say 4-1/2" to be safe) and meet the requirement of the section.
    The two requirements are both in force, it's not either/or. So in your example you'd still need 6" to comply with the section. If your computation came out greater than 6", then the longer length would apply.

    Cheers, Wayne

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