Which type of temperatures must not be exceeded by installed devices in a machinery room?

In a machinery room, certain safety standards must be met to ensure the safe operation of installed devices, particularly regarding temperature limits. The correct choice pertains to Class I, Division 2 locations, where explosive gas atmospheres may occasionally be present.

Devices installed in these areas must be able to withstand higher temperatures without igniting any flammable substances that might be present. The classification conveys that equipment is designed to operate safely under conditions where the likelihood of gas exposure is minimized, but safety standards must still be followed to prevent any potential ignition sources. Class I, Division 2 devices must not exceed specific temperature ratings that could result in ignition of materials in the vicinity.

Other classifications, such as Class III, Division 2, and Class II, may not have the same stringent requirements for temperature limits in the context of flammable gases and vapors. They focus on different types of hazards and environments, so the temperature limitations are tailored to the specific risks associated with Class I, Division 2 situations. Therefore, maintaining compliance with these temperature thresholds is crucial for the safety and operational integrity of devices in such environments.