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#6 grounding wire grounding rod?

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  • #16
    Originally posted by inetdog View Post
    EGCs do not need to be splice free, but GECs do, right?
    correct
    NABCEP certified Technical Sales Professional

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    • #17
      Originally posted by inetdog View Post
      EGCs do not need to be splice free, but GECs do, right?
      Stated incorrectly. EGC can be spliced as many times as you want using twist locks or any other mechanical connector you want. GEC can be spliced if you use the approved methods. Using a bus bar is one correct way.
      MSEE, PE

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      • #18
        Originally posted by Sunking View Post
        Stated incorrectly. EGC can be spliced as many times as you want using twist locks or any other mechanical connector you want. GEC can be spliced if you use the approved methods. Using a bus bar is one correct way.
        I would not consider a bus bar to be an irreversible splice, so it all seems to come down to where the GEC is being terminated. If it ends at the bus bar, then everything else connected to that bus bar would be an EGC instead, and you would not be splicing the GEC.

        If I had a ground electrode, with a single wire (GEC) which went through panel B, terminated at the ground bar in that panel and then another wire left that same ground bar and continued to the ground bar in Panel A which was the service equipment, I would not consider that to be compliant.
        SunnyBoy 3000 US, 18 BP Solar 175B panels.

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        • #19
          Originally posted by inetdog View Post
          I would not consider a bus bar to be an irreversible splice, so it all seems to come down to where the GEC is being terminated. If it ends at the bus bar, then everything else connected to that bus bar would be an EGC instead, and you would not be splicing the GEC.

          If I had a ground electrode, with a single wire (GEC) which went through panel B, terminated at the ground bar in that panel and then another wire left that same ground bar and continued to the ground bar in Panel A which was the service equipment, I would not consider that to be compliant.
          I have had inspectors make me terminate the bond wire at the grounding bus in the panel and most require it to be spliced to the GEC between the bus bar and the ground point.
          NABCEP certified Technical Sales Professional

          [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

          [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

          [URL="http://www.gaisma.com"]www.gaisma.com[/URL]

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          • #20
            Originally posted by inetdog View Post
            I would not consider a bus bar to be an irreversible splice, so it all seems to come down to where the GEC is being terminated.
            Perhaps a text book definition from the NEC is needed because the definition has changed.

            Grounding Electrode Conductor. A conductor used to
            connect the system grounded conductor or the equipment to
            a grounding electrode or to a point on the grounding electrode
            system.

            Note there are two objects being referenced:

            System ground conductor aka grounding circuit conductor (neutral), or equipment. What this means is there can be more than ONE GEC. The System Grounded Conductor as you know can only be bonded once and only once. Equipment can be grounded as much as you like. But here is your real answer about bus bars.

            250.64 Grounding Electrode Conductor Installation.
            Grounding electrode conductors at the service, at each
            building or structure where supplied by a feeder(s) or
            branch circuit(s), or at a separately derived system shall be
            installed as specified in 250.64(A) through (F).

            (C) Continuous. Grounding electrode conductor(s) shall
            be installed in one continuous length without a splice or
            joint except as permitted in (1) and (2):

            (1) Splicing shall be permitted only by irreversible
            compression-type connectors listed as grounding and
            bonding equipment or by the exothermic welding process.

            (2) Sections of busbars shall be permitted to be connected
            together to form a grounding electrode conductor.

            (D) Service with Multiple Disconnecting Means Enclosures.
            Where a service consists of more than a single enclosure
            as permitted in 230.71(A), grounding electrode
            connections shall be made in accordance with (D)(1),
            (D)(2), or (D)(3).

            (1) Grounding Electrode Conductor Taps. Where the
            service is installed as permitted by 230.40, Exception No.
            2, a common grounding electrode conductor and grounding
            electrode conductor taps shall be installed. The common
            grounding electrode conductor shall be sized in accordance
            with 250.66, based on the sum of the circular mil area of
            the largest ungrounded service-entrance conductor(s).
            Where the service-entrance conductors connect directly to a
            service drop or service lateral, the common grounding electrode
            conductor shall be sized in accordance with Table
            250.66, Note 1. A tap conductor shall extend to the inside
            of each service disconnecting means enclosure. The
            grounding electrode conductor taps shall be sized in accordance
            with 250.66 for the largest conductor serving the
            individual enclosure. The tap conductors shall be connected to
            the common grounding electrode conductor by exothermic
            welding or with connectors listed as grounding and bonding
            equipment in such a manner that the common grounding electrode
            conductor remains without a splice or joint.

            (2) Individual Grounding Electrode Conductors. A
            grounding electrode conductor shall be connected between
            the grounded conductor in each service equipment disconnecting
            means enclosure and the grounding electrode system.
            Each grounding electrode conductor shall be sized in accordance
            with 250.66 based on the service-entrance conductor(s)
            supplying the individual service disconnecting means.
            MSEE, PE

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