Connecting system for an electric power circuit for charging electric vehicles, comprising: a male socket and a female socket which are capable of transmitting an electric power current by virtue of the electric coupling between the conductors (P1, P2, P3, N, T) of the female socket and the corresponding contacts of the male socket when the male socket is in place in the female socket, the system also comprising an electric communication circuit between the male and female sockets, closure of which circuit is effected by the connection between a plug of the male socket and a plug of the female socket when the male socket is in place in the female socket, the system further comprising a locking device which can be switched between a first configuration for locking the male socket in the female socket and a second configuration for releasing the male socket, the locking device comprising: - a lock which is movable between a first position, corresponding to the first locking configuration, and a second position, corresponding to the second release configuration, - a lever for controlling the lock, which lever is movable between a first position and a second position, - a first switch of the communication circuit, which switch is configured to switch between a closed circuit configuration and an open circuit configuration according to the position of the lock, - a second switch of the communication circuit, which switch is configured to switch between a closed circuit configuration and an open circuit configuration according to the position of the control lever, the system being characterised in that: - the lock is movable in translation between its first and second positions, - the control lever is movable in translation according to an axis which is perpendicular to the axis of translation of the lock, - the lock is equipped with at least one cam and the control lever is equipped with at least one complementary cam supported on the cam of the lock, and - translation of the lever between its first and second positions causes translation of the lock between its first and second positions. - a lock which is movable between a first position, corresponding to the first locking configuration, and a second position, corresponding to the second release configuration, - a lever for controlling the lock, which lever is movable between a first position and a second position, - a first switch of the communication circuit, which switch is configured to switch between a closed circuit configuration and an open circuit configuration according to the position of the lock, - a second switch of the communication circuit, which switch is configured to switch between a closed circuit configuration and an open circuit configuration according to the position of the control lever, - the lock is movable in translation between its first and second positions, - the control lever is movable in translation according to an axis which is perpendicular to the axis of translation of the lock, - the lock is equipped with at least one cam and the control lever is equipped with at least one complementary cam supported on the cam of the lock, and - translation of the lever between its first and second positions causes translation of the lock between its first and second positions.