Abstract: An enclosed switchboard has a contact frame fitted with contacts which can move relative to a unit frame having with a circuit breaker, a molded case circuir breaker, an electromagnetic switch, an auxiliary relay, a fuse, an earth fault relay, and a timer mounted thereon. This permits the operation of the contacts in disconnected, test, and connected positions with the unit frame loaded in fixed position in the panel frame. As a result, the front door of the panel frame can be closed even in the test and disconnected positions, preventing an electric shock during running and the emission of arcs and substances out of the panel in case of accidents, and avoiding dangers of injuries and damage due to collisions because of the passage being blocked with open doors, which consequently provides a safe switchboard. In addition, the need of removing and keeping the unit separately can be eliminated.