PROUDLY SERVING MEMBERS THROUGHOUT CHELAN, DOUGLAS & OKANOGAN COUNTIES
This is a reminder that as of March 1, in accordance with WAC 296-46B-250(2), except for mobile/manufactured homes, a concrete encased grounding electrode must be installed and used at each new building or structure that is built upon a permanent concrete foundation. If the concrete encased grounding electrode is not available for connections, a ground ring must be installed per NEC 250. The concrete encased electrode must comply with NEC 250.52(A)(3). Inspection of the electrode may be accomplished by the following methods:
a) At the time of inspection of other work on the project, providing the concrete encased electrode is accessible for a visual inspection;
b) At the time of the service inspection providing the installer has provided a method so the inspector can verify the continuity of the electrode conductor along its entire length (e.g. attaching a length of copper wire to one end of the electrode that reaches the location of the grounding electrode conductor that will enable the inspector to measure the resistance with a standard resistance tester). The concrete encased electrode does not have to be accessible for a visual inspection; or
c) Other method when prior approval, on a jobsite basis, is given by the inspector. If a special inspection trip is required to inspect a grounding electrode conductor, a trip fee will be charged for that inspection in addition to the normal permit fee.
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