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EGC and Auxiliary Grounding Electrode in a solar array

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    EGC and Auxiliary Grounding Electrode in a solar array

    Is it acceptable to run an EGC from solar equipment on the roof (modules, racking, etc.) directly to an auxiliary grounding electrode outside and not bond that new electrode to the main electrode for the home? The only conductor connected to the electrode would be the one used for equipment grounding. Thanks!

    #2
    Originally posted by cramsden View Post
    Is it acceptable to run an EGC from solar equipment on the roof (modules, racking, etc.) directly to an auxiliary grounding electrode outside and not bond that new electrode to the main electrode for the home? The only conductor connected to the electrode would be the one used for equipment grounding. Thanks!
    You probably could if your solar equipment is set up for standalone operation. But otherwise, no.
    I will have achieved my life's goal if I die with a smile on my face.

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      #3
      I would say no, in general, even in stand alone operations. The only exception I can think of would be if the PV voltage was below 50, and there was no inverter. In other words, it would be okay only if there where no other grounding requirements to be met.

      If there are any AC grounding requirements at all then 690.47 requires the AC and DC grounding systems to be bonded together. Also generally the EGC needs to be run to the ground-fault-protection device, and thus not 'directly' to a grounding electrode.

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