circuit box; electrical panel
Technical term for an enclosure housing electrical or electronic circuits, often used in industrial or automotive contexts.
Inspect the circuit box in the factory.
High voltage runs through this electrical panel.
制御盤 is a control panel, often with switches and indicators, whereas 電装盤 may simply house circuits.
Compound of 電装 (electrical equipment) + 盤 (board/panel). The exact historical derivation is uncertain, but the term is used in modern technical contexts.