The distribution cabinet (box) is divided into power distribution cabinet (box), lighting distribution cabinet (box) and metering cabinet (box), which is the last level equipment of the distribution system. Distribution cabinet is the general term of motor control center. The distribution cabinet is used in occasions with scattered load and few circuits; Motor control center is used for occasions with concentrated load and many circuits. They distribute the electric energy of a certain circuit of the upper level distribution equipment to the nearby load. This level of equipment shall provide protection, monitoring and control for the load.