Safe Locks: What are the lock requirements for each burglary grade?

A safe´s burglary rating determines the minimum amount of time for which a safe must be able to withstand an attack. Naturally, in order to be rated at a higher security level and resist longer and tougher attacks, the safe must be designed with thicker, more resistant walls, bolts, hinges, and locks.

With regards to the locks specifically, these are classified in ascending security classes going from A through D as per EN-1300 Regulation.

Additionally, starting at security grade IV, safes and vaults must contain 2 separate locks and even 3 for grades XI and higher.