Multi family gas bonding

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bobbymari

Senior Member
Location
los angeles ca
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?
 
infinity said:
The NEC does not require additional bonding beyond the EGC run with the appliance branch circuit.
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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
 
bobbymari said:
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
Click to expand...
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
Click to expand...

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.
 
petersonra said:
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.
Click to expand...

agree
 
petersonra said:
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.
Click to expand...

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
 
Yup,
way back we couldn't get near a gas line, then it was 6' with some 'flashover' rationale, now it's a visible piece of #8CU or the gas nazi's have a cow....


~RJ~
 
petersonra said:
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.
Click to expand...
I also agree.

Thing is the possible condition they mentioned on their tag essentially exists anyway - just through the EGC instead of a more obvious conductor. Remove it and don't even try to explain - they won't care
 
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