Electrical Insulation - Edison Tech CenterExplore further
2015-8-20u2002·u20023.) Insulation in electric wires Knob and Tube. Early in-home wiring consisted of both braided sheaths for wires and 'Knob and Tube' system to keep wires away from wood beams, and send wires through wood beams (tubes). See our video demonstrating how it worked here. Left: Photo of display of knob and tube wiring at the Edison Tech Center.
Get Price