I am a little confused on something. Gas pipes are not to be used as a grounding electrode for safety reasons, but the gas system should be bonded to the grounding system also for safety reasons. I can see then not allowing the gas system to be the only grounding electrode, but to me, if it is metal, in ground, and bonded to the grounding system, it is a grounding electrode one way or the other.
Typical underground natural gas lines are plastic.
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Most metal gas piping systems have a dielectric fitting at the gas meter to isolate the interior piping from the buried pipe.
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That makes a lot more sense now. Thank you for the info!
Actually it was a great question. The interior metal gas piping system is bonded so that it cannot become energized. The bonding is accomplished by the connection of the EGC within the branch circuit to the appliance that may energize it. Additional bonding jumpers are not required to the gas piping system. Some brands of CSST may have requirements for a bonding jumper but that it not part of the electrical code.
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Starting the How to Perform Residential Electrical Inspections Course. Shocking how much information is in this course.
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It truly is! I was wondering if you or anyone has any information on the difference between service vs supply? To say that electrical is not my strong suit is an understatement.
Can you be a little more specific?
Are the service lines and the supply lines the same thing when it comes to electrical? Are they always interchangeable? Does one stop where the other starts vice versa?
I also have another question. I know shocker pun intended. Being electrical is one of the more dangerous parts or unforeseen dangers. What is some PPE that you could use to protect yourself?
Without some context I’m not sure what exactly you mean because neither of those terms are really correct. Part of the difficulty with learning about the electrical system is that often we’re taught using slang or incorrect terminology. Your question mentions “service lines” and “supply lines”. The NEC has a few terms close to service lines, they are service entrance conductors and service conductors. For the sake of this discussion the distinction between the two is not really relevant just know that with either of those types you have conductors that are the line side of the service disconnect. That is important because those conductors have different applicable code rules when compared to feeders and branch circuit conductors.
Regarding “supply lines” (sounds like a plumbing term) I’m not sure what that means but it could be referring to a branch circuit conductor or a feeder conductor. Again the correct terminology takes out the guess work.
When deciding about what PPE a home inspector should be using I’ll defer that question to the professional home inspectors.
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Thank you. I guess that’s the problem growing up with plumbers and carpenters in the family. Everything is a nail when you’re holding a hammer. You hit the nail on the head with service conductor and feeder conductor. Thanks again. I apologize for the confusion and appreciate the information.
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You’re welcome. Although often ignored Article 100 of the 2023 NEC has 36 pages of definitions so when learning about electrical systems it’s good to try and use the proper terminology. It helps immensely when the educational source that you’re using also does same.
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Hi All! I’m new to this course and I looking forward to learning more. I have been reading through a lot of the comments above me and I have already found your questions and answers to be helpful. Thanks in advance for any other help you provide.
This has been my favorite course so far, I learned a ton!