Option 11C Grounding Requirements:

[hardyshook]

Does an Option 11C with 3 Cabinets have to be grounded to the Electrial Service Box that it gets it power from with the Electrical?

Does each Cabinet have to have its own #6 AWG Ground wire running back to the Grounding Block?

 

[wirednet]

yes, yes. Do it right to start and it will be one less possible problem.
Different electrical potentials can be created if you do not ground to the same point.