This also means that the individual product was manufactured under the U.L. Listed - This means that U.L has tested samples of a complete and total product and LISTED the product because it passed their safety tests.label that says "Approved" because that would imply a wide range of acceptance. You will notice that some labels say "Listed" and others say "Classified". Look for the label on the inside of any safe to find out if it is U.L. Some safes may only have one or the other. testing will have a label on the inside of the door, or on the top of the inside of the door, similar to this safe below which has both the fire and burglar test labels. testing is the real standard of product performance.
Many safe manufactures will have their safes tested at a private laboratory to save money however, U.L. Underwriters Laboratory testing is the toughest in the industry, and only equipment that meets their requirements carries their label. They also certify and test many types of safes to make sure they meet certain requirements for fire and theft. labels are printed and placed on products each year. Underwriters Laboratory (U.L) is a product safety testing and certification organization that develops standards for many products, materials, components, assemblies, tools and equipment.