PHEL Curves 4-6: what is the space temperature condition?

PHEL Curves 4-6: what is the space temperature condition?

• A. Space DB temperature >=90 °F.
• B. Space DB temperature >=85 °F.
• C. Space DB temperature >=75 °F.
• D. Space DB temperature >=100 °F.

Answer: (B)

The main idea is recognizing what the space dry-bulb temperature condition is for PHEL Curves 4-6. Space DB temperature refers to the ambient air temperature in the space where the equipment sits, measured with a normal dry-bulb thermometer. For these curves, the condition is that the space temperature must be at least 85 °F. The “≥” means it can be 85 °F or any higher temperature, which reflects testing under moderately hot environmental conditions. Cooler environments, like 75 °F, aren’t covered by these curves, while more extreme temps such as 90 °F or 100 °F correspond to different curve sets or scenarios.

The main idea is recognizing what the space dry-bulb temperature condition is for PHEL Curves 4-6. Space DB temperature refers to the ambient air temperature in the space where the equipment sits, measured with a normal dry-bulb thermometer. For these curves, the condition is that the space temperature must be at least 85 °F. The “≥” means it can be 85 °F or any higher temperature, which reflects testing under moderately hot environmental conditions. Cooler environments, like 75 °F, aren’t covered by these curves, while more extreme temps such as 90 °F or 100 °F correspond to different curve sets or scenarios.