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2023 Code Video - 250.104(B)
Keeping up with the requirements of the Code should be the goal of everyone involved in electrical safety. The following is what I feel is an important rule in the 2023 NEC®, complete with graphics and a video. I encourage you to use it as a training resource for your organization, and share it with your colleagues.
Bonding Other Metal-Piping Systems [250.104(B)]
This content is extracted from Mike Holt's 2023 Understanding NEC Requirements for Bonding and Grounding Video Program.

Click here or on the thumbnail to view or download the PDF of this rule.

Click on the image above to watch the video

When a fault occurs in an electrical appliance, like a gas range, the connected metal gas piping could become energized exposing users to possible electric shock or fires caused by pinhole leaks in the gas piping caused by arcing.

To eliminate these hazards, metal gas piping must be properly bonded per NEC 250.104(B). This section covers metal piping systems, including gas piping, when they’re likely to become energized.

Want to learn more?
Check out the attached text and join Mike and the team in the video as they break down NEC 250.104(B) and explain exactly what you need to know about bonding metal gas piping systems.
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We'd love to hear from you about this series, and the ways you're using it. Send us your comments and feedback by clicking on "Post a Comment" below. Look out for the next part in this series a month from now, and please share with your colleagues.
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Comments

  • It always concerned me that several times that I placed an amprobe on house copper water service & steel gas supply pipe. Even with meter pulled would usually measure up to 0.25 Amos on copper water service and up to 0.12 amps on gas service We all know that electricity takes the least resistance path but also multi paths.Before a few homes in my block were ten years old the underground steel gas pipe were leaking.When I piped in my replacement natural gas furnace instructions stated to use a dielectric union on the algae pipe. My local plumbing supply did not have any 3/4 or 1" dielectric unions so reused the original union. Did replace the old 14/2 AC cable with 12/2 MC cable. Ran a bonding jumper on trunk duct that had a coated canvas sound isolation joint.

    garbo  March 10 2025, 10:39 pm EDT
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