Abstract: An electrical enclosure where all functional compartments are accessible only from a front and the enclosure has a width that is no greater than twenty-four inches. Plenum chambers provide an exit path from releasing gas pressure and particulate matter generated during an arc flash event within the enclosure and prevent the gases and particulate matter from entering the other compartments. A vacuum circuit breaker compartment may include insulator bushings and current transformers that are each individually removable from a front of the enclosure. A removably connected roof panel permits selective front accessibility to the bus bar compartment through the plenum chamber and a flap movably connected to the bus bar compartment. A wall of the cable connection compartment includes an opening and a portion of a wall of the voltage transformer compartment is removably connected to facilitate access to the cable connection compartment from a front of the enclosure.

Abstract: An electrical enclosure where all functional compartments are accessible only from a front and the enclosure has a width that is no greater than twenty-four inches. Plenum chambers provide an exit path from releasing gas pressure and particulate matter generated during an arc flash event within the enclosure and prevent the gases and particulate matter from entering the other compartments. A vacuum circuit breaker compartment may include insulator bushings and current transformers that are each individually removable from a front of the enclosure. A removably connected roof panel permits selective front accessibility to the bus bar compartment through the plenum chamber and a flap movably connected to the bus bar compartment. A wall of the cable connection compartment includes an opening and a portion of a wall of the voltage transformer compartment is removably connected to facilitate access to the cable connection compartment from a front of the enclosure.