Abstract: An evacuation appliance comprising a mounting plate configured to be connected to a wall, with the mounting plate having a terminal clip. The evacuation appliance further includes a notification device having at least one notification member, with the notification device being configured to be connected to the mounting plate to electronically connect the terminal clip to the at least one notification member to power the at least one notification member. The mounting plate and the notification device comprise an accessible testing system, such that when the mounting plate and the notification device are connected, the notification device can be measured using the accessible testing system to determine if the notification device is properly receiving power from the terminal clip without disconnecting the notification device from the mounting plate.