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Thread: clearances for service disconnects

  1. #1
    Join Date
    May 2003
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    3

    clearances for service disconnects

    My manufacuring facility has moved a rolling table in front of a service disconnect 30A 480 volt. In 110.26A working spaces has mention of 3ft depth but the table can be rolled away. Does the disconnect need to be moved or is it OK? Just looking for thoughts on that

  2. #2
    Join Date
    Feb 2003
    Location
    Seattle, WA
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    17,201

    Re: clearances for service disconnects

    110.26(B) Clear Spaces. “Working space required by this section shall not be used for storage.”

    It is arguable as to whether a roll-away table would constitute “storage,” but I would try to get the table moved elsewhere. By the way, I am guessing you did not mean “service” disconnect, but rather a disconnect for a specific component. That might not change the code interpretation, but it might. If there is no reason to ever expect that the disconnect would require “examination, adjustment, servicing, or maintenance while energized,” then the working clearances would not apply.
    Charles E. Beck, P.E., Seattle
    Comments based on 2014 NEC unless otherwise noted.

  3. #3
    Join Date
    Dec 2003
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    TAMPA FLORIDA
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    4,576

    Re: clearances for service disconnects

    110.26 applies
    If it's in front of disc. it's violation
    I see no exceptions over it having wheels.
    How about liability if in emergancy it cant be reached fast?
    Tampa Florida

  4. #4
    Join Date
    Dec 2003
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    TAMPA FLORIDA
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    Re: clearances for service disconnects

    110.26 b clear spaces can't have storage or blockage
    Tampa Florida

  5. #5
    Join Date
    Feb 2003
    Location
    Wisconsin
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    8,791

    Re: clearances for service disconnects

    Ask 4 engineers a question and you will get 5 different answers. So, here is mine.

    Art 110.26 deals with access to electrical equipment.

    Art 110.26(A) is only applicable for servicing/maintenance of energized parts.

    Art 110.26(F) requires dedicated space around all electrical disconnects, panels, and switchgear. But there is an exception for equipment that controls machinery.

    If the subject disconnect is non-fused or primarily used for Lock Out/Tag Out (control of operating equipment) then the exception to 110.26(F) is applicable and the exact amount of "accessibility" is not defined by the NEC. However, if the disconnect contains fuses that would be replaced with "live" line side lugs then 110.26(A) is applicable.
    Just because you can, doesn't mean you should.

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