An electrical cabinet comprises circuit breakers (5) that can be snap-fitted onto a door (2) hinged to a body of the cabinet and equipped with electrical connectors (26) connected to portions of electrical circuits (28) inside the door (2). Said portions (28) connect to fixed portions of the electric circuit, via other connectors, when the cabinet is closed. This makes it possible to avoid movablecable harnesses inside the cabinet, the sometimes problematic bolting-on of circuit breakers (5) by the end-fittings (6) of same, and the risk of electrical accidents.