close-up of two three-wire wires attached to the wall. wiring of electrical wiring on the wall of aerated concrete bricks. power

aerated attached background bare black blurred braid bricks cable chloride close-up concrete conductor connection construction copper cut deenergization electric electrical electrician for grounding house industry insulation mortgages polyvinyl power private repair section sheath shutdown sockets stationary switch thermal thickness three-wire threecore two voltage wall walls winding wire wires wiring without