What bulb colors correspond to ordinary temperature ratings for sprinkler systems?

In sprinkler systems, the color of the bulb in a sprinkler head indicates the temperature rating, which is vital for ensuring proper activation of the sprinkler in a fire. Ordinary temperature ratings typically correspond to fire hazards found in non-metallic areas, such as office spaces, storage rooms, and similar environments.

The use of orange or red bulbs signifies that the temperature rating is suitable for ordinary hazards, which is usually around 135°F to 170°F (57°C to 77°C). These colors effectively communicate to the installer and maintenance personnel the temperature at which the sprinkler system will activate, making them crucial for fire safety protocols.

The other color options do not correspond to typical ordinary temperature ratings, as other colors like green or yellow are usually associated with lower temperature ratings, and colors like blue or purple often represent higher temperature ratings used for different classifications of hazards. Therefore, the correct identification of the orange or red bulb color ensures that the sprinkler system is effective for the intended application in ordinary conditions.