Both MCC and switchgears have been discussed in the past. Please use the Search this forum on right hand side of this screen. You will land up with plenty of threads which will answer your query.
In North America, MCCs are primarily for motor loads, but you can have feeders in them, Switchgear is primarily for feeder circuits. You can theoretically add motor controllers to low voltage Switchgear, but you may have trouble with UL. In Medium VOltage however, UL only recognizes Switchgear, so all MV MCCs are technically Switchgear anyway.
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