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Thread: Bonding Metallic Raceways Connected to Nonmetallic Equipment

  1. #1
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    Bonding Metallic Raceways Connected to Nonmetallic Equipment

    314.3 requires internal (Ex No.1) or integral bonding means (Ex No. 2) when metal raceways or metal-armored cables are used with nonmetallic boxes.

    Why is there no Code requirement for internal or integral bonding means for metal raceways or metal-armored cables used with nonmetallic equipment enclosures?

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    Even in a non metallic equipment enclosure isn’t there a bonding screw point or grounding screw point? If not, don’t you still treat it like a box, by tying grounds together, including using grounding bushings for metal conduits?
    Student of electrical codes. Please Take others advice first.

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    I don't see any requirement in the Code to bond the metal raceway or metal wiring method to the ground bar inside the nonmetallic equipment enclosure. 314.3 applies to boxes.

    I guess 250.4(A)(5) is the only section I can find that may apply. There would be lower impedance if the metal raceway or metallic wiring method was bonded at the nonmetallic equipment enclosure.

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