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Porcelain Another advantage of knob and tube wiring was the use of porcelain insulators.

First cut through the plaster along box outline.

also made fabric-insulated electrical wire described further at.

These wires were installed by running them in the walls between porcelain knobs, which kept them properly tensioned, away from the wood framing, and facilitated easy direction changes in the wiring.

Hankey is a National Radon Proficiency Program certified measurement professional and a Level II infrared thermographer.

If you're using a bare wire for some crazy reason and you want it coated, replace the wire with an insulated one or use heat-shrink tubing.

GFCIs ground-fault circuit interrupters shut down circuits in 4 milliseconds, before a current can cause a deadly shock.

On 2020-06-04 - by mod - Andrew See my notes on my copy of your photo; [Click to enlarge any image] On 2020-06-04 by Andrew Any ideas on what the heck I'm seeing here? Also, Ford in '65 was plastic wire wrapped in plastic to make the harness rather than cloth , like an electrical tape, but I think it's specific for making harnesses.

Knob and tube wiring diminished in popularity in North America by 1940, but continued to be installed as new work in some locations including New York until about 1975.

is principal of Hankey and Brown home inspectors, Eden Prairie, MN.