The Cash Rating indicates what an insurance underwriter will insure the contents of the safe for and can usually be multiplied by 10 times for valuables. This means that a safe with a £1000 cash rating would be suitable to protect £1,000 cash or £10,000 of valuables. Cash ratings are a guide to the security level of the safe; the higher the rating, the more resistant the safe is to attack.
The cash ratings are only a guide and assume that the safe is correctly installed. Insurance underwriters may require a higher or lower rating depending on the perceived risk, location etc. It is important to check with your insurance company and get their approval, before purchasing a safe.