Abstract: Methods, systems, apparatus and devices for an arc resistant electrical enclosure that includes a duct system of adjacent pressure relief chambers separated by flame arresting ventilation partitions to provide a torturous mechanical maze to relieve internal pressure and extinguish internal hot flames within the flame arresting duct system prior to exiting the enclosure expelling gasses into the external environment. The adjacent partitioned pressure relief chambers for routing pressure and or flames through the duct system with ninety degree turns from one pressure relief chamber into the next adjacent pressure relief chamber. In an embodiment, a set of ventilation panels is located within one or more of the adjacent pressure relief chambers and each next pressure relief chamber can have a volume that is less than the volume in the preceding chamber.

Abstract: Methods, systems, apparatus and devices for an arc resistant electrical enclosure that includes a duct system of adjacent pressure relief chambers separated by flame arresting ventilation partitions to provide a torturous mechanical maze to relieve internal pressure and extinguish internal hot flames within the flame arresting duct system prior to exiting the enclosure expelling gasses into the external environment. The adjacent partitioned pressure relief chambers for routing pressure and or flames through the duct system with ninety degree turns from one pressure relief chamber into the next adjacent pressure relief chamber. In an embodiment, a set of ventilation panels is located within one or more of the adjacent pressure relief chambers and each next pressure relief chamber can have a volume that is less than the volume in the preceding chamber.

Abstract: An electrical contactor draw out tray has a movable frame and a stationary frame in which the movable frame carries the electrical components for an electrical feeder circuit. The stationary frame is preferably housed within a power distribution center and has input terminals for the incoming electrical power and output terminals for delivering electrical power to equipment operating on the feeder circuit. The movable frame carries the contactors that control the flow of electricity through the apparatus as well as the electrical components to monitor conditions of the apparatus and various parameters for the electricity carried therein to for conditions such as short circuits, overloads, ground faults, overvoltages and undervoltages. A disconnect mechanism locks the movable frame relative the stationary frame and provides a primary means for disengaging electrical flow through the apparatus.