PART III. GROUNDING ELECTRODE SYSTEM AND GROUNDING ELECTRODE CONDUCTOR
250.68 Grounding Electrode Conductor Termination.
(A) Attachment Fitting. The grounding electrode attachment fitting must be accessible.
When the grounding electrode attachment fitting is encased in concrete or buried, it must be listed and identified for this purpose [250.70].Exception 2: An exothermic or irreversible compression connection to fireproofed structural metal isn't required to be accessible.
Exception 1: The grounding electrode attachment fitting to an encased or buried grounding electrode isn't required to be accessible. Figure 250.119
(B) Effective Ground-Fault Current Path. To ensure a permanent and effective grounding path for an underground metal water pipe electrode, a bonding jumper must be installed around insulated joints and equipment likely to be disconnected for repairs or replacement. Figure 250.120
Continuity of the conductive bonding path for metal water piping as required by 250.104(A) cannot rely on water meters, filtering devices, or similar equipment [250.53(D)(1)].
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