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Thread: Table 400-4 Usage

  1. #1
    Join Date
    Feb 2003
    Location
    Illinois
    Posts
    1

    Table 400-4 Usage

    Table 400-4 refers to terms 'hard usage' and 'extra hard usage' in the column under use. Is there a deffinition of these terms?

  2. #2
    Join Date
    Sep 2003
    Posts
    381

    Re: Table 400-4 Usage

    None in the NEC or UL that I can find. But, Hard Usage would be of a construction to resist most normal abuse, and Extra Hard Usage would be constructed to a higher standard. I would imagine that these standards would be spelled out in the manufacturing regulations.
    Or: Hard Usage - ridden hard
    Extra Hard usage - ridden hard and put away wet.
    (Applies to motor cycles)
    Earl

  3. #3
    Join Date
    May 2003
    Location
    Salt Lake City, Utah
    Posts
    5,319

    Re: Table 400-4 Usage

    I think 90.4 would be the only section that applies. Sorry.
    Ryan Jackson, Salt Lake City
    Inspector, Instructor

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