Ключевые слова: black, cable, cable line, cable network, cabling, current, direct current, electric cables, electrical construction material, electrical energy, electrical installation, electricity, electricity consumption, electricity industry, energy costs, energy form, energy production, industrial, installation material, installations, kilowatt hours, laying, network, nobody, object, plug, potency, potential, power cable, power line, red, strip, supply line, voltage, wire, wiring,