Where must overcurrent devices and non-power-limited fire alarm circuits be located?

Overcurrent devices, such as breakers or fuses, and non-power-limited fire alarm circuits must be located at the point where the conductor receives its supply. This positioning is essential for several reasons.

First, placing overcurrent protection at the supply point allows for the effective monitoring and protection of the entire circuit from excessive current that can cause overheating and potential fire hazards. By ensuring that these devices are at the origin of the circuit, they can efficiently interrupt the power supply in the event of a fault condition.

Secondly, fire alarm circuits that are non-power-limited often require specific protection as dictated by applicable codes and standards. These circuits are typically routed in a way that makes them critical in signaling for safety, so having their overcurrent protection at the supply point ensures they can function properly and reliably during emergencies.

This configuration ultimately enhances safety and compliance with electrical codes, which dictate that such protective measures must be in place to safeguard both property and lives.