Ключевые слова: background, black, cable, charger, choice, circuit, concept, connection, copy, cord, danger, dangerous, electric, electrical, electricity, energy, engineering, equipment, extension, flat, grounded, industry, labor protection, lay, line, messy, nobody, object, overload, plastic, plug, power, protection, safety, saving, security, set, space, strip, supply, technology, top, unplug, view, voltage, volts, white, wire, worker,