The answer here is Blind carbon copy (bcc).
The original recipients of the letter are unable to see (blind) who else receives a copy if those parties are on the bcc list.
Answer:
Motor Control Center
Explanation:
Such centers are built to control various or all (if possible) electric motors found in a central location. The Motor Control Center usually comprises of many section that are enclosed but having one central power bus, but each of the section would have its own combination starter. It is an efficient power distribution system also.
