Circuit in the consumer unit SENSE Series R is divided into several sub-circuits, known as split bus system. First sub circuit is not protected by RCBO, and the other sub circuits are protected by RCBO individually. When residual current (leakage current) or electric shock caused by residual current occurs in any sub-circuit, the electric current in that sub-circuit will only be cut off. The other sub-circuits still work normally. Moreover, Due to Including completed wiring, our consumer unit is ready to use.