National Electrical Installation Standards

Standards as High as Your Own

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Tuesday, June 22, 2021

Question:

Greetings CQD,

Does the natural gas (NG) external piping, regulator, meter and all the threaded connections require electrical grounding per the national or any other codes pertaining to NG? I am being told by the Gas Company no because they have a plastic fitting (elbow) between the ground being provided on the house side which is proving a ground for my gas appliances. This seems strange to me that they are not grounding their equipment. How does this act if lighting hits their equipment? 

David Chianese

A

Answer:

Hello David,

Thanks for participating. The response is based on the information in your question. Your question mentions grounding twice. The NEC requires that other metal piping, including gas piping be bonded based on Section 250.104(B). NFPA 54 the National Fuel Gas Code also requires metal gas piping to be bonded. Underground gas piping is not permitted to be used as a grounding electrode, based on Section 250.52(B)(1), which explains why many gas companies include a dielectric insulator for isolating the underground metal gas piping from the building electrical system. It is best to contact the local authority having jurisdiction in this situation based on our understanding of differing interpretations of these requirements.  Hope this is helpful.

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