The maximum ambient ceiling temperature for an ordinary temperature rated sprinkler is ______________.

The maximum ambient ceiling temperature for an ordinary temperature rated sprinkler is defined as 100 degrees Fahrenheit. Ordinary temperature rated sprinklers are typically designed to operate in environments where the temperature does not exceed this threshold.

This rating is critical because it helps ensure the effective operation of the sprinkler system in the event of a fire. If the ambient temperature exceeds the upper limit, it may cause the sprinkler to activate prematurely or fail to operate effectively when needed, compromising safety.

In this context, understanding the temperature ratings of different types of sprinklers is vital for properly designing and installing sprinkler systems to protect life and property in various environments.