A sealed electrical enclosure for use in hazardous locations for enclosing circuit breakers or other electrical components comprising: a bottom housing having a first end wall and a second end wall opposite the first end wall; a top housing positioned above the bottom housing; a labyrinth joint or serrated joint or combination of both being formed between the bottom housing and the top housing; the bottom housing adapted to receive a first circuit breaker and a first electrical component (140, 150, or 160); a first aperture extending through the first end wall, the first aperture further including a first contact terminal bus extending through the first aperture and which may be in electrical contact with a first contact terminal of a first circuit breaker when the first circuit breaker is positioned within the bottom housing, the first terminal bus also extending to a point external to the bottom housing; a second aperture extending through the second end wall, the second aperture further including a second contact terminal bus extending through the second aperture and which may be in electrical contact with a second contact terminal of the first circuit breaker when the first circuit breaker is positioned within the bottom housing, the second contact terminal bus also extending to a point external to the bottom housing; a first actuating mechanism positioned on the top housing adapted for manipulating a switch of the first circuit breaker; wherein the top housing is removably secured to the bottom housing to allow for removal and replacement of the first circuit breaker or the first electrical component within the housing; characterized in that: the first and second apertures are machined apertures; the first contact terminal bus is configured to be positioned through the first aperture; and the second contact terminal bus is configured to be positioned through the second aperture. a bottom housing having a first end wall and a second end wall opposite the first end wall; a top housing positioned above the bottom housing; a labyrinth joint or serrated joint or combination of both being formed between the bottom housing and the top housing; the bottom housing adapted to receive a first circuit breaker and a first electrical component (140, 150, or 160); a first aperture extending through the first end wall, the first aperture further including a first contact terminal bus extending through the first aperture and which may be in electrical contact with a first contact terminal of a first circuit breaker when the first circuit breaker is positioned within the bottom housing, the first terminal bus also extending to a point external to the bottom housing; a second aperture extending through the second end wall, the second aperture further including a second contact terminal bus extending through the second aperture and which may be in electrical contact with a second contact terminal of the first circuit breaker when the first circuit breaker is positioned within the bottom housing, the second contact terminal bus also extending to a point external to the bottom housing; a first actuating mechanism positioned on the top housing adapted for manipulating a switch of the first circuit breaker; wherein the top housing is removably secured to the bottom housing to allow for removal and replacement of the first circuit breaker or the first electrical component within the housing; characterized in that: the first and second apertures are machined apertures; the first contact terminal bus is configured to be positioned through the first aperture; and the second contact terminal bus is configured to be positioned through the second aperture. the first and second apertures are machined apertures; the first contact terminal bus is configured to be positioned through the first aperture; and the second contact terminal bus is configured to be positioned through the second aperture.