Ключевые слова: and, board, box, breaker, button, circuit, component, construction, control, danger, distribution, do, electric, electrical, electricity, energy, equipment, gear, health, industrial, industry, installation, isolated, isolation, lamps, lock, locked, machine, main, not, occupational, off, operate, panel, power, safety, stop, substation, supply, switch, switchgear, system, tag, technical, technology, voltage, work,