Abstract: An uninterruptible power supply (UPS) is disclosed in which AC line power is used to charge a back-up battery and to operate a load during a stand-by mode of operation of the UPS. In the back-up mode of operation when AC line power is not available, the battery is used to supply power to the load. The UPS automatically tests the load and the battery when the AC line power is available to assure availability of back-up power in case of a failure of the AC power. The results of the test is displayed to the user.

Abstract: A module for use in a multiple electrical outlet strip, and the strip itself, are provided which are easy to assemble, in which the components are positively held in place, and which may be constructed of a wide variety of materials. The module includes first and second integral molded plastic components which receive positive, negative, and ground bus bars within them, the bus bars being positively held in place by projections formed on the first and second molded components. The ends of the bus bars are connected to electrical wires. The first and second module components are held together by screws. The electrical outlet receptacles formed by the module are inserted into receiving openings in the top part of a casing for an electrical outlet strip. The top and bottom portions of the casing normally are of metal. The module is held to the upper portion of the casing by screws.