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Thread: Grounding clip vs. ground screw.

  1. #11
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    Quote Originally Posted by darekelec View Post
    Self grounding receptacles on powder coated surface 'mulberry' covers require grounding pigtail.
    So it is just easier to install a grounding pigtail every time and tell everybody to do so around here.

    That's only on 4 11/16" box mulberry covers, 1900 (4") mulberry covers do not require a bonding jumper.
    Rob

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    All responses based on the 2014 NEC unless otherwise noted

  2. #12
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    Quote Originally Posted by romex jockey View Post
    It's somewhat debatable as to BX is an ECG , as it was not manufactured to be one in the first place

    I'd just go with 406.4D, park a DF in the panel ,and use any old crappy receptacle outlet....

    ~RJ~
    I agree, there is no way I would rely on an old BX cable armor as an EGC, you might as well strap heating elements to inside of the wall should a fault occur.

  3. #13
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    Quote Originally Posted by peter d View Post
    I agree, there is no way I would rely on an old BX cable armor as an EGC, you might as well strap heating elements to inside of the wall should a fault occur.
    How do you know how old the cable is? The bonding strip was added to AC cable in the mid-1950's and has been there ever since, would that be unsafe as an EGC?
    Rob

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    All responses based on the 2014 NEC unless otherwise noted

  4. #14
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    Quote Originally Posted by infinity View Post
    How do you know how old the cable is? The bonding strip was added to AC cable in the mid-1950's and has been there ever since, would that be unsafe as an EGC?
    No, I'm talking about the old stuff that has no bonding strip, has rubber and cloth insulated conductors and is usually badly corroded when I encounter it. That makes up the majority of what is installed here in homes, very few have the bonded AC cable.

  5. #15
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    That there was a history of pre EGC wiring methods that evolved to 'bonding strip' BX during the 'two banger' dup rec outlet era ,along with the infamous boston backwrap is indicative of it's viability.

    Regardless of the OP's AHJ views on an EGC and/or the provisions of 406.4 to mitigate 'replacement' , one is still dealing with the afci aspect of 406.4




    ~RJ~
    Last edited by romex jockey; 05-07-18 at 04:47 AM.

  6. #16
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    Quote Originally Posted by peter d View Post
    No, I'm talking about the old stuff that has no bonding strip, has rubber and cloth insulated conductors and is usually badly corroded when I encounter it. That makes up the majority of what is installed here in homes, very few have the bonded AC cable.
    I know that BX is a very generic term and has different regional means. Around here some even call modern MC cable BX.
    Rob

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    All responses based on the 2014 NEC unless otherwise noted

  7. #17
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    Quote Originally Posted by infinity View Post
    That's only on 4 11/16" box mulberry covers, 1900 (4") mulberry covers do not require a bonding jumper.

    Inspectors here enforce 250.12 on factory painted surface covers

  8. #18
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    Quote Originally Posted by darekelec View Post
    Inspectors here enforce 250.12 on factory painted surface covers
    Then they're enforcing a rule that is not supported by the NEC. 1900/4" Mulberry covers are not required to have a bonding jumper when installed according to 250.146(A). The fact that they're factory painted is irrelevant as they have been tested and listed to bond the receptacle with the factory paint.
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

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