Ключевые слова: 3, board, box, cabinet, circuit, connect, connection, control, controller, current, danger, distribution, door, electric, electrical, electricity, electronic, enclosure, energy, engineering, equipment, exterior, factory, gauge, industrial, industry, installation, line, metal, meter, outlet, panel, phase, power, safety, steel, supply, switch, system, technology, temperature, thermometer, three, volt, voltage,