Hidden knob tube wiring

I intended this post to be an example of hidden dangers of k&t wiring but it quickly became more about my competence as a home inspector.

This place has turned into a social media venue for out of work home inspectors with nothing else to do.

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Knob and tube is still around. Needs proper air circulation to cool them old wires!

I can’t count how many times I’ve been told the whole house was rewired only to find active K/T in the attic (and probably in the walls too).

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Same here. They don’t rewire the ceiling lights, and then the new homeowner buries it with insulation.

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The knob & tube is lying on NM wiring. How do you know that you are not detecting voltage from it?

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Interesting
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Not at all. It will detect voltage of the touching or close to touching NM when using a non-contact voltage tester. Its no different than people testing the dead front with one and thinking that it is energized.

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I don’t remember off hand but I don’t think you can induce a voltage with perpendicular conductors.

I do not see the knob or tube insulators.