A ____ is a large single panel, frame, or assembly of panels with front- or rear-mounted switches, protective devices (overcurrent, etc.), buses, and, usually, instruments.

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A switchboard is defined as a large single panel, frame, or assembly of panels with front- or rear-mounted switches, protective devices (overcurrent, etc.), buses, and, usually, instruments. Panelboard is a similar term, but it refers specifically to panels that distribute power to branch circuits. Circuit cabinet and panel cabinet are not commonly used terms in the electrical industry.

A ____ Is a Large Single Panel, Frame, or Assembly