* According to Lori Greene, DAHC/CDC, CCPR, FDAI, FDHI
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Known formally as the Underwriters Laboratories Standard for Access Control System Units, UL 294 is used to evaluate the construction, performance, and operation of access control systems. From power supplies and card readers, to delayed egress locks and control panels, the electronic components that are necessary for the proper operation of the access control system are tested thoroughly to ensure they will operate reliably without creating a hazardous condition. Product performance is evaluated based on four different levels of testing - destructive attack, line security, endurance and standby power. Although the current model codes do not specifically state which of these levels must be met in order for the system to be code-compliant, the testing required for UL 294 – Level 1 establishes that the products are safe for egress purposes, which is the main concern of the model codes.