I Have a question about 3 vs 4 wire dryer recptacles. I understand the new 4 wire standard on new construction and the need to update a 3 wire setup when doing a service change with a meter main, making the MSP a subpanel. As I understand it, old 3 wire setups were spec'ed for MSP termination only. I understand shock hazard on the shell of the dryer on a 3 wire set up. My question is: When you install a meter main and seperate grounds and neutrals in the newly created subpanel, if you were to leave an existing 3 wire setup and land the bare ground on the subpanel neutral bar, are you substantially increasing the shock hazard ? My understanding is no not really, the potential hazard is the same, but you now have a situation in the subpanel where you technically dont have a proper place for the bare ground without violating 250. Not arguing for skirting this requirement, just curious.
ConservativeMasshole
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