Ключевые слова: background, backup, board, cable, circuit, closeup, colourful, connected, connection, conservation, copy, cord, current, dangerous, electric, electrical, electricity, energy, equipment, extension, flat, floor, green, grounded, holding, isolated, lay, multiple, off, outlet, overload, plastic, plug, portable, power, progress, protection, save, socket, strip, switch, technology, top, unplug, view, voltage, way, white, wire,