The basic structure of a motor control center (MCC) is a metal cabinet divided into multiple vertical sections that are isolated from one another. The MCC enclosure is typically NEMA or IP rated for protection against ingress of solid and liquid contamination, and if the working environment is harsh — dusty or hot, for example — the motor control center can be located remotely, away from machinery or equipment, or even in a separate, climate-controlled room.
Motor control centers are classified as either low-voltage, for controlling motors from 230V to 1000V, or high-voltage, for controlling motors from 1000V to 15kV.