Where should the location of the circuit disconnecting the primary power be identified?

The identification of the circuit disconnecting the primary power is essential for ensuring safety and quick access in case of emergencies or maintenance. Locating this information on the circuit breaker itself is significant because it provides immediate, direct access to the control mechanism for the power supply. When a technician or user approaches the breaker, they can see exactly where to disconnect power without needing to reference additional documentation, making it a practical and efficient safety measure.

In contrast, while information in the user manual can provide guidance, it may not be readily accessible during an emergency. The exterior of the building is more concerned with outward visibility than technical details. The electrical panel does contain important information regarding circuit connections, but it might not offer quick identification of the primary power disconnect without inspecting individual breakers closely. Hence, having the disconnect labeled directly on the circuit breaker ensures that safety procedures can be swiftly and effectively followed.