Final answer:
The minimum size for a RMC conduit should be equal to or greater than the sum of the sizes of the wires to accommodate them safely.
Step-by-step explanation:
The minimum size for a RMC (Rigid Metal Conduit) to contain the given wires can be determined by calculating the total area needed to fit all the wires.
The size of the conduit should be large enough to accommodate the wires without any difficulty. It should be equal to or greater than the sum of all the individual wire sizes.
Calculating the area required and selecting a conduit size based on that would ensure that the wires can be safely housed within the conduit.