Final answer:
An MCC with size 3 or smaller starters and terminations on terminal blocks is tailored for compactness and maintenance, and its class and type are defined by NEMA standards depending on its configuration and application.
Step-by-step explanation:
The term MCC refers to a Motor Control Center, which is often used in industrial settings to control and manage the operation of electric motors. The specific class and type of an MCC consisting of interconnecting units with size 3 or smaller starters and terminations on terminal blocks mounted on the bottom of each vertical section is generally designed for compactness and ease of maintenance. These MCCs typically come in different classes defined by the National Electrical Manufacturers Association (NEMA), with the type being further specified by their configuration and the application they are designed for.
The class and type of the MCC (Motor Control Center) you described consists of interconnecting units with size 3 or smaller starters and terminations on terminal blocks mounted on the bottom of each vertical section. This type of MCC is known as a traditional non-extendable MCC.
A Motor Control Center is an assembly of one or more enclosed sections, each containing a combination of motor starters, drives, and related control devices. MCCs are used to control and distribute power to electric motors, providing protection and coordination.
They are typically used in industrial applications to control large motors or motor loads, such as those found in factories or manufacturing facilities.