Where is the type and size of overcurrent protection specified?

• A. Panelboard schedule
• B. Wiring diagram
• C. Manufacturer catalog
• D. Equipment label

Answer: (A)

The document that lists each circuit and the protective device used for it is the panelboard schedule. It records the type and size of overcurrent protection installed on every branch circuit, such as the specific breaker type and its amp rating. A wiring diagram shows how wires are connected, not which protective devices protect each circuit. A manufacturer catalog provides product data and options, not the protections already installed in a panel. The equipment label on a piece of equipment might state allowable protections or limits for that device, but it doesn’t itemize the protections for all circuits in the panel. So, the panelboard schedule is where the type and size of overcurrent protection for each circuit are specified.