Circuit intermittent grounding

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Cwood89

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Location
TX
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Teacher
Where should I start to diagnose intermittent grounding on a circuit? I have 3 power strips on the same circuit with lights to indicate "grounded" and "protected". The "protected" indicator light is always illuminated, but the "grounded" indicator light is intermittent (indicator light goes from bright to very dim) About 4 hours on and then goes very dim, then back on again very bright, then dim. About 4 hour intervals. This happens on all 3 outlet strips simultaneously.
 

charlie b

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Electrical Engineer
I am closing this thread in accordance with forum rules. This forum is intended for use by electricians and electrical contractors, inspectors, engineers, and vendors with their job-related duties. We are not allowed to provide how-to advice to persons who are not employed in this industry, or persons who do not perform electrical installation or maintenance as part of their jobs.
 
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