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Thread: Multi family gas bonding

  1. #1
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    Multi family gas bonding

    Recently did a multi family service upgrade , ran 2 ground rods and tagged the cold water entry.
    We typically daisy chain all the gas lines and bond them to cold water as well. In this instance we bonded them directly to one of the rods.
    gas co left a notice stating unapproved wire at gas lines could potentially become electrified.
    am I missing something or is bonding the gas lines accomplishing the exact opposite of what they are saying?

  2. #2
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    Is your connection on the customer side of any gas meter ?
    At my age, I'm accustomed to restaurants asking me to pay in advance, but now my bank has started sending me their calendar one month at a time.

  3. #3
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    Is this CSST?
    Rob

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    All responses based on the 2014 NEC unless otherwise noted

  4. #4
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    Quote Originally Posted by infinity View Post
    Is this CSST?
    Not csst piping and im on customer side of all meters after shut offs

  5. #5
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    Quote Originally Posted by augie47 View Post
    Is your connection on the customer side of any gas meter ?
    Yes sir we sure are

  6. #6
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    Quote Originally Posted by bobbymari View Post
    Not csst piping and im on customer side of all meters after shut offs
    The NEC does not require additional bonding beyond the EGC run with the appliance branch circuit.
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

  7. #7
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    Quote Originally Posted by infinity View Post
    The NEC does not require additional bonding beyond the EGC run with the appliance branch circuit.
    Wouldnt 250.104(b) require the gas lines to be bonded?

    Metal Gas Piping. Each aboveground portion of a gas piping system upstream from the equipment shutoff valve shall be electrically continuous and bonded to the grounding electrode system? Trying to get a firm grasp on this

  8. #8
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    Quote Originally Posted by bobbymari View Post
    Wouldnt 250.104(b) require the gas lines to be bonded?

    Metal Gas Piping. Each aboveground portion of a gas piping system upstream from the equipment shutoff valve shall be electrically continuous and bonded to the grounding electrode system? Trying to get a firm grasp on this
    It is bonded via the EGC run with the circuit(s) that supply the equipment using the gas.

    Note the use of the qualifier "likely to become energized". If there is no electricity that would energize the piping system no need to bond it.

    (B) Other Metal Piping. If installed in or attached to a building
    or structure, a metal piping system(s), including gas piping,
    that is likely to become energized shall be bonded to any of the
    following:
    (1) Equipment grounding conductor for the circuit that is
    likely to energize the piping system

    (2) Service equipment enclosure
    (3) Grounded conductor at the service
    (4) Grounding electrode conductor, if of sufficient size
    (5) One or more grounding electrodes used, if the grounding
    electrode conductor or bonding jumper to the
    grounding electrode is of sufficient size
    I don't think what you did violates the NEC. just is unnecessary.

    It might violate the gas company rules to make the bond where you did.
    Bob

  9. #9
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    Quote Originally Posted by petersonra View Post
    It is bonded via the EGC run with the circuit(s) that supply the equipment using the gas.

    Note the use of the qualifier "likely to become energized". If there is no electricity that would energize the piping system no need to bond it.



    I don't think what you did violates the NEC. just is unnecessary.

    It might violate the gas company rules to make the bond where you did.
    agree
    At my age, I'm accustomed to restaurants asking me to pay in advance, but now my bank has started sending me their calendar one month at a time.

  10. #10
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    Quote Originally Posted by petersonra View Post
    It is bonded via the EGC run with the circuit(s) that supply the equipment using the gas.

    Note the use of the qualifier "likely to become energized". If there is no electricity that would energize the piping system no need to bond it.



    I don't think what you did violates the NEC. just is unnecessary.

    It might violate the gas company rules to make the bond where you did.
    ok, didnt mention entire setup but I will now cause its bugging me. Service /multimeter upgrade all existing tenant feeds remained other than remoeled units therefore existing tenant feeds from the 60s/70s done in flex with no egc so gas fired appliances i/e piping system likely to become energized relying on old flexes as the ground. My brain tells me this method is added insurance that a possibly old rotted out flex under bldg laying on top of a gas line will actually short versus electrifying gas lines upon a ground fault . Mind you my brain also loves football and beer

    going to call gas company to verify

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