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Thread: NEC Article 645 and NFPA 75

  1. #1
    Join Date
    Jun 2008
    Location
    Campbell CA
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    226

    NEC Article 645 and NFPA 75

    Hi everyone, I like to know if there is any exceptions to requirements NEC-645 which permits a IT room not to be fire resistant-rated walls, no need for EPO's as per 645-10, and that we donot have to install fire/smoke dampers.
    Thanks in advace for the input.

  2. #2
    Join Date
    Feb 2003
    Location
    Massachusetts
    Posts
    51,792
    All of Article is 645 is voluntary unless you want to take advantage of the leniences it allows in wiring methods.

    Most systems work best if they are kept simple rather than made complicated; therefore simplicity should be a key goal in design and unnecessary complexity should be avoided.

  3. #3
    Join Date
    Feb 2003
    Location
    New York, 40.7514,-73.9925
    Posts
    3,618
    Well said by Bob.
    645.4 indicates that the article only applies if you provide EPO's, fire rating, etc.
    NFPA 75 is a standard and not a code adopted by any jurisdiction that I am aware of.
    Ron

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