A fire alarm control unit (FACU) is installed in a location where the ambient temperature is expected to reach 45°C. The manufacturer's instructions for the FACU specify a maximum operating temperature of 40°C. What action is required by the NEC 2026?
The FACU must be derated by 20% of its rated capacity.
The location must be modified to maintain the ambient temperature below 40°C, or a different FACU suitable for 45°C must be used.
No special action is required as long as the enclosure is listed for the environment.
A forced-air cooling system must be installed regardless of the FACU's listing.
The correct answer is located in the National Electrical Code Section XXX.XX(Y)(Z). Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
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