Does ground clamps inside a wall need to be accessible?


Senior Member
Working on a school. Asked foreman if we need to make the clamps to the cwp and gas pipe accessible . He said no it already passed inspection. What does the code say? Thank you for your help.


Staff member
250.68(A) Accessibility. All mechanical elements used to terminate a grounding electrode conductor or bonding jumper to a grounding electrode shall be accessible.

Exception No. 1: An encased or buried connection to a concrete-encased, driven, or buried grounding electrode shall not be required to be accessible.

Exception No. 2: Exothermic or irreversible compression connections used at terminations, together with the mechanical means used to attach such terminations to fire-proofed structural metal whether or not the mechanical means is reversible, shall not be required to be accessible.


Senior Member
USA, mostly.
I have normally been required to mount a mud ring and a cover plate. This always confused me because it hardly made the connection accessible for any kind of repair. I would guess this was just for a visual inspection. Also, this was very much AHJ dependent. Even in the same jurisdiction, different inspectors wanted or did not want.