A leakage current protection device (such as a power plug) for an electrical appliance includes a shell and a trip assembly inside the shell. The shell includes an upper cover and a base cover joined together, and either the upper cover or the base cover includes a first cover and a removable second cover. The removable second cover spatially corresponds to a tail portion of the trip assembly; when it is removed, the tail portion is exposed to allow a power cord to be connected to the leakage current protection device. By using a removable second cover, the cord can be conveniently assembled with the device when the device is installed on the electrical appliance, allowing the to be shipped without the cord. This can reduce the packed size of the device for easier shipping and storage, as well as lowering cost. It also makes the device more versatile.