Final answer:
Regarding the question on sub-panel requirements, the correct option is that the neutral and ground must be separated, and the system must be both bonded and isolated to ensure safety and proper electrical function.
Step-by-step explanation:
The student's question pertains to the requirements for sub-panels, specifically in an electrical context, involving the proper grounding and bonding methods. When installing a sub-panel, the neutral and ground wires must be separated, which ensures that any fault current can be appropriately directed to the ground without affecting the neutral wires of the electrical system. To minimize potential electrical hazards, these terms need to be fully comprehended and properly implemented.
A fault on a properly grounded system will cause a circuit breaker to trip, disconnecting the electrical supply and preventing shock and fire hazards. Furthermore, bonding is important as it provides a path for electricity to return safely to the ground without causing harm to users or the electrical system.