The receptacle includes an insulated body, a pair of pins and a micro switch. The insulated body has a recess. The pair of pins is fixed in the insulated body and located in the recess. The pair of pins includes a first pin and a second pin. The second pin electrically connects a wire. Each of the first and second pins has a free end. The recess is divided into an inner region and an outer region by the two free ends. The micro switch is movably connected in the insulated body and disposed correspondingly to the wire. The micro switch has a contact sheet which can selectively be in contact with the wire. The micro switch is located in the inner region of the recess.