30A wire capacity to 20A outlet is fine if the conductors will fit the outlet screws. I didn't go any larger than #10awg because any larger is a bear to work with (& won't fit into the outlet anyway). Wiring code advises against 2nd seperate ground rod (something about potential ground currents causing damage if you receive a direct lightning hit) but many people do run it separately anyway with good results. Others advise to make a connection from the isolated ground rod back to the original rod (to eliminate the lightning potential scenario) however I don't know if that affects / degrades the isolated grounding advantages; I suspect that it might not be a problem. I would think that the two rods being in close proximity would reduce the hazard potential, if in fact that is actually a real world concern? It sounds like you might actually have an enlightened electrical guy there - his idea sounds reasonable to me anyway.
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- 19 posts total
- 19 posts total