UL fire resistive container classifications

   class 125

  n.

   a group of UL classifications for containers that maintain inside temperatures less than 125 degrees Fahrenheit when exposed to a fire of specific temperature and duration. The times and fire temperatures are:

   • ½ hour 1700 degrees F.

   • 1 hour 1700 degrees F.

   • 2 hour 1850 degrees F.

   • 3 hour 1925 degrees F.

   • 4 hour 2000 degrees F.

   class 150

  n.

   a group of UL classifications for containers that maintain inside temperatures less than 150 degrees Fahrenheit when exposed to a fire of specific temperature and duration. The times and fire temperatures are:

   • ½ hour 1700 degrees F.

   • 1 hour 1700 degrees F.

   • 2 hour 1850 degrees F.

   • 3 hour 1925 degrees F.

   • 4 hour 2000 degrees F.

   class 350

  n.

   a group of UL classifications for containers that maintain inside temperatures less than 350 degrees Fahrenheit when exposed to a fire of specific temperature and duration. The times and fire temperatures are:

   • ½ hour 1700 degrees F.

   • 1 hour 1700 degrees F.

   • 2 hour 1850 degrees F.

   • 3 hour 1925 degrees F.

   • 4 hour 2000 degrees F.