Where must the circuit directory for panel boards be located?

• A. On the face inside in approved location to the panel door
• B. On the exterior of the panel
• C. In a separate binder
• D. Inside the service equipment room

Answer: (A)

The directory belongs with the panel itself so you can identify circuits quickly and reliably. Placing the circuit directory on the interior face of the panel door (an approved location) keeps it with the equipment, easy to read, and easy to update whenever breakers are changed or circuits are added. This makes it straightforward to map each breaker to its corresponding circuit without having to look somewhere else, which improves safety and efficiency during maintenance or emergencies.

Putting the directory on the exterior of the panel is unlikely to be protected or kept up-to-date and can be damaged or concealed. A separate binder can be lost or mismatched to the actual panel, so it wouldn’t be immediately usable at the panel. Keeping the directory inside the service equipment room removes it from the point of control and makes on-the-spot identification more difficult.