Gas Pipe Bonding Requirements, NEC 2020 - [250.4(A)(4)], (12min:16sec)

What are the NEC requirements for bonding of gas piping systems? What other than NEC requirements are involved in bonding metal gas piping? Metal gas piping must be bonded to the circuit equipment grounding conductor if there likely to become energized. However, many AHJ’s throughout the country enforce the metal gas piping to be bonded with an additional bonding jumper in accordance with the National Fuel Gas Code.

[mcarroll]

I passed my Electrical Contractor Master License today in Ohio first try, It was really tough but your videos help A LOT! Thanks!

[garbo]

At an IAEI class about 6 years ago while stuck in the 2008 NEC was Told that to bond any CSST you have to go by what the manufacturer says. The NEC should have one spelled out method. I got called out to a friend who had a fire place feed by CSST mounted one inch above carpets. I was worried about people running a vacuum cleaner damaging this thin tubing over time. Anyway it took me halve a dozen phone calls to get an answer. Thanks for another great vid.

[garbo]

I think that every duct should be bonded. Years ago where the duct work coming out the top of a gas furnace had a rubber noise isolation section. An old clothe covered by 14/2 NM cable was ran at a 90 degree angle from duct by touching it. After more then 20 years it rubbed thru insulation almost causing a fire. About 6 years ago we were told at a CEU class that every manufacturer of CSST has their own method of bonding. You would think they could get just 1 style if a clamp or fitting to bond all CSST.

[scottmorse]

Something you may want to consider is when the gas piping is threaded onto the gas fitting of the appliance a non-conductive paste or approved tape is used on the threads. This isolates the piping from the appliance. So it is not bonded through the circuit grounding conductor but it's also not likely to become energized. Lol Just don't mount it to the building steel that is likely to become energized. This is always a fun point of contention with the inspectors.
I just thought you'd want to think about it first before it comes up in a discussion.

[mmareviewer.]

This guy is always passionate.
Mike Holt working hard for us from his space!

[norme]

The reasoning behind the CSST bonding is to mitigate damage from lightning, the yellow coated stuff being very susceptible. I have seen two instances in the last three years where lighting blew a hole in unbonded CSST, one of which ignited the gas (luckily inside the fireplace). Our AHJ’s require gas line bonding as part of the electrical inspection which I fully support.

[eixr]

This is a great application for the Mechanical Contractor to use the Inter systems bonding connection we provide at the GEC.

[mr.g]

I say just bond no matter what. Need to be prepared for future installation changes where the electrician is no longer there.

[davenag]

Another code Quagmire. Sounds like a mechanical contractor problem to me. It's their piping that they have been paid to install per the mechanical code. It's not my job to tell a sprinkler contractor how to install their work, or a gas fitter how to install their work, just like it's not their job to tell me how to install my electrical work. Unless it's specifically pointed out in the division 16 specifications on the approved plan, or the AHJ tells me specifically that I need to do it, I'm not going to be concerned with it. I've survived this trade for 40 years and I think common sense is the way to go in this case.

[Tmfndlb]

Gas ranges require 120 volt, and are typically connected to the same gas piping system as the water heater. So, the gas system must always be bonded. Also, what they mean by in accordance with NEC would mean NEC rules still apply to the bonding conductor. For instance, it should be secured or stapled, etc..

[joelsnyder]

Out city wants us to always bond the gas ..but especially if that flexible gas piping is used. I assume that is the CSST. Also, we don't bond underground propane tanks without a dielectric fitting. To prevent providing an alternate path to ground. They seem "UNlikely" to become energized if you ask me.

[garbo]

When I piped in my gas furnance instuctions stated to use a dielectric union on the 3/4" gas pipe. I went to the local plumbing supply house and they did not have any in stock so I reused the original union. I did install 12/2 MC cable to replace 40 year old type AC cable. Often wondered if we should install a bonding jumper between the cold & hot water copper lines at gas water heaters due to they have insolated fittings even though they would bond together at downstream metalic faucets.

[tristatehomesllc]

I would save more time bonding 100 gas lines before trying to explain this to our building inspectors. They're clueless.

[qomco]

Residential hvac apprentice, thank you sir!
I just wish field wiring were as clean as your diagram

[anthonyelectric]

A lot of miss information out there. Equipment Grounding Conductor. Done👍

[Chris_In_Texas]

Sounds like a government agency can't make up its own mind. When both NFPA 70 and NFPA 54 are contradicting each other. Then the AHJ's read it one way or another and can't agree either. In my own house, my gas line isn't bonded, but its more than 75' away from the panel. That being said technically or at least electrically, the gas line is bonded, indirectly, but the water line bond, through the water heater. There would be a need for bonding as many high efficiency gas water heaters or power vented water heaters do have electrical connections as well. However in our area they are just run romex into the box with no metal EMT or MC cables. But based off the info you presented the grounding conductor is normally screwed to the metal of the fixture directly. I know many of the cities require bonding around us, due to lightning strikes we get and set houses on fire. You get the flash over arc in the attic where the gas line and metal duct work from the chimney run through the attic as most fire places have gas run to them, even though there are no electrical igniters run to them. Great video Mike! 👍

[Apollo]

Bonding for static and dielectric charges

[jmacstuff]

It just maybe a local code. Here is California Equipment bonding includes gas metal piping and water lines. This is in addition to 2 ground rods, or a ufers. There requirement is two or more grounding conductors. Also water lines at the water heater needs to have a jumper from hot to cold at the water heater piping. This is required by the electrical contractor when installing service panels here. What the diagram with the water heater is not showing, is the bonding connector back at the gas meter main already bonded, therefore no bonding required of the gas pipe at the gas water heater. The 2015 uniform plumbing code 1211.2 Bonding of CSST Gas Piping. CSST gas piping systems shall be bonded to the electrical service grounding electrode system. The bonding jumper shall connect to a metallic pipe or fitting between the point of delivery and the first downstream CSST fitting. The bonding jumper shall be not smaller than 6 AWG copper wire or equivalent. Gas piping systems that contain one or more segments of CSST shall be bonded in accordance with this section. [NFPA 54:7.13.2]. Its true, no mater what you do, you get sued. Thumbs up there.

[carylamari]

I think what they mean when they say in accordance to the NEC is, lets say you use drive a grounding electrode because it is closer and less work or the basement is completely finished and it is easier to install a ground rod and attach the gas pipe to that with a #6 conductor. In the NEC it says all grounding electrodes need to be connected together. So you need to find some way to create continuity between your new electrode to the building grounding electrode. I believe this is what they mean in the NFGC. IMO

[kylem]

Wow! What an awesome presentation and just the great info I needed. Thank you so much Mike and take care!