An electrical outlet system, comprising: a terminal member to which a feed line is to be connected; and a connection member to which a plug is to be connected, the electrical outlet system further comprises: a temperature detector configured to detect a temperature of the connection member as a detection temperature and detect a temperature of the terminal member as an auxiliary detection temperature; and an open/close unit electrically connected between the terminal member and the connection member, the open/close unit being configured to be switched from a conduction state to an interruption state when a determination condition including that the detection temperature is higher than or equal to a threshold temperature is satisfied, being switchable from the interruption state to the conduction state when the determination condition is not satisfied, when an auxiliary determination condition including that the auxiliary detection temperature is higher than or equal to an auxiliary threshold temperature is satisfied, the open/close unit being switched from the conduction state to the interruption state, and switching of the open/close unit from the interruption state to the conduction state being restricted. a terminal member to which a feed line is to be connected; and a connection member to which a plug is to be connected, the electrical outlet system further comprises: a temperature detector configured to detect a temperature of the connection member as a detection temperature and detect a temperature of the terminal member as an auxiliary detection temperature; and an open/close unit electrically connected between the terminal member and the connection member, the open/close unit being configured to be switched from a conduction state to an interruption state when a determination condition including that the detection temperature is higher than or equal to a threshold temperature is satisfied, being switchable from the interruption state to the conduction state when the determination condition is not satisfied, when an auxiliary determination condition including that the auxiliary detection temperature is higher than or equal to an auxiliary threshold temperature is satisfied, the open/close unit being switched from the conduction state to the interruption state, and switching of the open/close unit from the interruption state to the conduction state being restricted. a temperature detector configured to detect a temperature of the connection member as a detection temperature and detect a temperature of the terminal member as an auxiliary detection temperature; and an open/close unit electrically connected between the terminal member and the connection member, the open/close unit being configured to be switched from a conduction state to an interruption state when a determination condition including that the detection temperature is higher than or equal to a threshold temperature is satisfied, being switchable from the interruption state to the conduction state when the determination condition is not satisfied, being configured to be switched from a conduction state to an interruption state when a determination condition including that the detection temperature is higher than or equal to a threshold temperature is satisfied, being switchable from the interruption state to the conduction state when the determination condition is not satisfied, when an auxiliary determination condition including that the auxiliary detection temperature is higher than or equal to an auxiliary threshold temperature is satisfied, the open/close unit being switched from the conduction state to the interruption state, and switching of the open/close unit from the interruption state to the conduction state being restricted.