AC Grounding High Resistance

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teamwork
skipper
skipper
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Joined: Tue May 27, 2014 9:32 am

AC Grounding High Resistance

Post by teamwork »

During a recent corrosion survey, it was discovered that there is 60 ohms of resistance between the AC grounding buses and the Main DC negative bus in my electrical panel. The ABYC electrician conducting the survey explained that these two buses should be electrically connected with less than one ohm resistance between them, and spent some time trying to diagnose the cause, unsuccessfully. Here are a few questions:
1) Does anyone know exactly where the electrical connection between these two points is made?
2) Has anyone else tested this resistance and found the same high resistance?

Thanks! Roger on Teamwork
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