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Thread: Bonding isolated rigid pipe section

  1. #11
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    Quote Originally Posted by ActionDave View Post
    No. 300.3(B)
    Wouldn't 250.102(E) allow what Coppersmith proposes?

    Cheers, Wayne

  2. #12
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    300.2 (B) (2) Grounding and Bonding Conductors. Equipment ground‐
    ing conductors shall be permitted to be installed outside a race‐
    way or cable assembly where in accordance with the provisions
    of 250.130(C) for certain existing installations or in accordance
    with 250.134(B), Exception No. 2, for dc circuits. Equipment
    bonding conductors shall be permitted to be installed on the
    outside of raceways in accordance with 250.102(E).
    so let's take a look, 250.130C has 6 options, including>>>

    250.130(C) (1) Any accessible point on the grounding electrode system
    as described in 250.50
    That G rod is looking good....assuming it all considered existing installation

    250.134(B) EX 2 is about DC, no soap....

    however>>>

    250.130(C)(2) Outside a Raceway or an Enclosure. If installed on the
    outside, the length of the bonding jumper or conductor or
    equipment bonding jumper shall not exceed 1.8 m (6 ft) and
    shall be routed with the raceway or enclosure.

    Exception: An equipment bonding jumper or supply-side bonding
    jumper longer than 1.8 m (6 ft) shall be permitted at outside pole loca‐
    tions for the purpose of bonding or grounding isolated sections of metal
    raceways or elbows installed in exposed risers of metal conduit or other
    metal raceway, and for bonding grounding electrodes, and shall not be
    required to be routed with a raceway or enclosure.
    that would appear to be the options i can find this a.m.

    ~RJ~

  3. #13
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    Quote Originally Posted by ActionDave View Post
    No. 300.3(B)
    Quote Originally Posted by wwhitney View Post
    Wouldn't 250.102(E) allow what Coppersmith proposes?
    250.102(E)(2) does seem to conflict with 300.3(B) unless an "equipment bonding jumper" is different than the EGC and bonding conductors referred to in 300.3(B). I getting a bit confused as to if they are the same or not.

    250.102(E) Installation. Bonding jumpers or conductors and
    equipment bonding jumpers shall be permitted to be installed
    inside or outside of a raceway or an enclosure.
    (2) Outside a Raceway or an Enclosure. If installed on
    the outside, the length of the bonding jumper or conductor
    or equipment bonding jumper shall not exceed 1.8 m (6 ft)
    and shall be routed with the raceway or enclosure.

    300.3(B) Conductors of the Same Circuit. All conductors of
    the same circuit and, where used, the grounded conductor
    and all equipment grounding conductors and bonding conductors
    shall be contained within the same raceway, auxiliary
    gutter, cable tray, cablebus assembly, trench, cable, or
    cord, unless otherwise permitted in accordance with
    300.3(B)(1) through (B)(4).

    Grounding Conductor, Equipment (EGC). The conductive
    path(s) that provides a ground-fault current path and connects
    normally non–current-carrying metal parts of equipment
    together and to the system grounded conductor or to the
    grounding electrode conductor, or both.

    Bonding Conductor or Jumper. A reliable conductor to
    ensure the required electrical conductivity between metal
    parts required to be electrically connected.

    Bonding Jumper, Equipment. The connection between two
    or more portions of the equipment grounding conductor.

  4. #14
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    it's not doing my adhd much good this morning either Copper , what was the old addage?

    Not all bonding is grounding, but all grounding is bonding?

    ~RJ~

  5. #15
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    Quote Originally Posted by ActionDave View Post
    No. 300.3(B)
    Quote Originally Posted by wwhitney View Post
    Wouldn't 250.102(E) allow what Coppersmith proposes?

    Cheers, Wayne
    If the raceway contains an EGC then all conductors mentioned in 300.3(B) are in the raceway. One must still bond the metal raceway with a bonding jumper and wouldn't matter if above ground or underground either.
    I live for today, I'm just a day behind.

  6. #16
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    OK, I need a little more help here. The inspector is giving me a hassle. He says I need to change the PVC riser to metal pipe and run it to the panel and put a grounding bushing on. I think I'm good the way it is:

    I don't see how he can dictate raceway choice.

    There is a EGC in the pipe with the other conductors. (300.3)

    The metal elbow end of the pipe run is about 5ft from the panel and is bonded using an external clamp and an external wire which closely follows the pipe. (250.86) (250.102(E)(2))

    The only place I vary from the NEC is I am using a jumper from the grounding electrode conductor since the ground rod is 2 inches from the metal elbow. (The wire actually hits the pipe first, then goes to the ground rod. One continuous wire.) I think that is fine and the inspector has not said anything about it but I could run a second "equipment bonding jumper" if necessary. They both originate on the ground bar.

    The definition of bonding conductor seems to indicate it can be one-in-the-same with the grounding electrode conductor.

    Bonding Conductor or Jumper. A reliable conductor to
    ensure the required electrical conductivity between metal
    parts required to be electrically connected.

    Am I right or wrong?
    Last edited by Coppersmith; 09-19-18 at 09:37 PM.

  7. #17
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    Just put a 12 x 12 metal junction box on one end and ground the RMC there.

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