The 20VA/24V AC class 2 power supply for use in fixed camera applications. These economical power supplies, which are for indoor use only, plug into any 120V AC duplex wall receptacle having a center screw. A mounting screw in the top of the power supply replaces the screw in the center of the receptacle cover to fasten the power supply securely to the receptacle. Two screw terminals on the power supply provide easy connection of the 24V AC output to one or more cameras. A fuse inside the sealed unit provides protection against power supply or camera failure.