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Why there are two ground wires?

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  • Why there are two ground wires?

    Hi!

    I just found two wires in a junction box in a commercial place and just wondering why there are two ground wires.

    I attached a picture and you will find a black wire, a white, a green and a bare wire.

    Can anyone explain this?

    Thank you.
    Attached Files

  • #2
    Re: Why there are two ground wires?

    Originally posted by khlee815 View Post
    Hi!

    I just found two wires in a junction box in a commercial place and just wondering why there are two ground wires.

    I attached a picture and you will find a black wire, a white, a green and a bare wire.

    Can anyone explain this?

    Thank you.

    Looks to me like the green wire is ground running in the MC cable,and they put a bare copper wire pigtail tied to the box, for the device.

    Huck.

    Comment


    • #3
      Re: Why there are two ground wires?

      Originally posted by huckster4 View Post
      Looks to me like the green wire is ground running in the MC cable,and they put a bare copper wire pigtail tied to the box, for the device.
      That's exactly what I see as well.

      Comment

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