What is meant by a load center?

• A. A panel or box that distributes electrical power to branch circuits from a single source.
• B. A device that measures electrical load.
• C. A grounding wire.
• D. A transformer bank.

Answer: (D)

A load center is the central panelboard that takes power from a single source and distributes it to multiple branch circuits. It’s the main hub where the incoming electrical service is connected to bus bars, and each branch circuit is protected by its own breaker. This setup keeps wiring organized and provides overcurrent protection for every circuit in the building.

It’s not a device that measures electrical load—that would be a meter. It’s not a grounding wire, which is a conductor that provides a safety path to earth. It’s not a transformer bank, which would step voltage up or down. So the best description is that a load center is a panel or box distributing electrical power to branch circuits from a single source.