Burglar ratings are a mix of manufactuer standards and Underwriters Laboratory burglar ratings. A general guideline for the type of safes versus the content value is as follows (you should always ask your insurance broker to contact Underwriters Laboratory for additional recommendations on content value storage).
These ratings and content values are guidelines only. These are guidelines intended to help you decide which burglar rating is best for you. Safe manufacturers do not guarantee these amounts, however, we are sharing them with you to help you make an informed safe buying decision.
Fire ratings and classifications involve three primary components; the maximum exterior temperature, length of time and maximum interior temperature. Underwriters Laboratories (UL) also tests for explosion hazard and offers optional testing for impact. When considering protection of electronic media, testing for humidity should also be done.
It is generally agreed that a maximum interior temperature of 350 degrees F is adequate for most valuables, with paper charring at 450 degrees F. Electronic media is more sensitive and therefore subject to a higher standard, commonly accepted to be either 150 degrees F with a maximum 85% humidity or 125 degrees F with a maximum of 80% humidity according to what type of electronic media being protected.
The time noted on the UL label indicates how long the product was tested to withstand the extreme temperatures while maintaining the indicated maximum interior temperature and, if it applies, humidity.
The time rating also designates how hot the exterior temperature will get during the testing process. The product is placed in a furnace and the temperature rises over time.
There is a correlation between time and maximum temperature as follows:
1/2 Hour Rated Products
1 Hour Rated Products
2 Hour Rated Products
3 Hour Rated Products
4 Hour Rated Products
1550 degrees F
1700 degrees F
1850 degrees F
1920 degrees F
2000 degrees F