Alarm system for breaking of over load protector in heating cable control box

The present invention relates to a heating cable control box. The heating cable control box given in the present invention includes: a circuit breaker for electrical wiring; an electronic switch; an overload protector which protects a circuit in case of overload or a short circuit; an alarm unit which sets off an alarm when the overload protector is on; a terminal bar to which a heating cable is connected; and a control unit which controls the functional operation of the control box. In the terminal bar of the present invention, a connection terminal and a terminal bar signal unit (A) are integrated. The terminal bar signal unit and the electronic switch transmit a power status signal to the control unit. If the signal from the terminal bar signal unit indicates that the power to the heating cable is blocked, the control unit compares the signal from the terminal bar signal unit and the signal from the electronic switch to determine whether to set off an alarm. [Reference numerals] (10) Power line; (120) Electronic switch; (140) Terminal bar; (150) Control unit; (155) Leakage breaking comparison unit; (160) Communication