I recently installed CSST in my basement to supply natural gas to an outside BBQ grill. Essentially it's CSST from the manifold to a termination plate on the wall, and then black iron pipe outside under the deck to the grill.

I know I need to ground the CSST back to the house ground; however the panel is a floor above me and routing copper up there would be a pain. Having said that - we recently had the main panel swapped out and in the process a second earth ground was installed (apparently two are required here for code). I have access to that ground fairly easily under the deck. I am wondering if there would be any issue running my 6-gauge ground wire and attaching it directly to the outside ground?

  • FYI, two grounding rods are required everywhere by the NEC.
    – FreeMan
    Sep 3, 2021 at 13:29

2 Answers 2


You'll need to use the right connector, but yes, you can do that

Bonding CSST to a grounding electrode conductor is fine as long as you don't cut said grounding electrode conductor. To that end, you can use a clamp-on (mechanical) T-tap connector such as an Ilsco GTT-2-2 to make the connection. From there, you can run 6AWG copper (as per IFGC 310.2.2 and the equivalent NFPA 54 text) to a suitable bonding clamp on a bronze or black iron piece electrically continuous with the CSST, not on the CSST itself.

  • Thank you! I can't upvote since I'm new, but I appreciate your response. I was able to end up bonding to the brass nut on my CSST (that mates to the manifold) and went from there to the ground. Sep 14, 2021 at 20:05
  • @CaryonInferno you should be able to click the check mark next to the answer that helped you the most.
    – FreeMan
    Feb 1, 2022 at 17:42

Practically speaking you can't splice the grounding electrode conductor.

The NEC requires grounding electrode conductors to be continuous allowing only irreversible compression type splices Listed as grounding and bonding equipment which typically requires a designated tool, or by exothermic welding.

  • 1
    So this answer seems to be yes, as long as you connect properly to the ground rod or the continuous copper conductor. Sep 3, 2021 at 15:19
  • Also you may want to verify that #6 is adequate size. The grounding electrode conductor for most residential services is required to be #4 CU with an exception allowing #6 for rod, pipe, and plate electrodes. It's not completely clear to me that the bonding of CSST would be accepted by your local inspector. Sep 3, 2021 at 15:23
  • @NoSparksPlease -- IFGC 310.2.2 explicitly calls out 6AWG as an adequate minimum for this without regard to any electrical code considerations Sep 3, 2021 at 22:09

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