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Thread: Article 100: Intrinsically Safe wiring vs Nonincendive wiring

  1. #1
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    Article 100: Intrinsically Safe wiring vs Nonincendive wiring

    Are these essentially the same thing? Is one superior to the other in terms of arc/spark capability? I'm in a Class I, Division 2, Gp's C&D environment.
    Thanks in advance.

  2. #2
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    Quote Originally Posted by Dale001289 View Post
    Are these essentially the same thing? Is one superior to the other in terms of arc/spark capability? I'm in a Class I, Division 2, Gp's C&D environment.
    Thanks in advance.
    If you are asking about the wiring methods generally they are similar. IS requires some labeling and if you want to run multiple circuits in a single cable has some additional requirements.

    IS reduces the risk of an arc by limiting the energy available in the circuit to the point where no arc is possible. It can be used in both D1 and D2 areas.

    NI wiring is only available for D2 areas and reduces the risk of an arc by design choices but does not reduce the level of available energy to a limit where no arc is possible.

    I don't think either one is "superior" to the other. They are design choices.
    Bob

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