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Originally Posted by jtfoxman
I have spoken with a few electricians in my area regarding this since I have some in my attic and they say the knob and tube is actually very safe. As long as the insulation is in good condition.
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That is because the hot and neutral wires are spread apart, and go around ceramic insulators and when passed thru cavities, are placed inside protective 'tubes'.
Btu HayZee mentioned about deterioration of the splices (I think they call these "flying taps", or something like that)...and that is a point well made. But I wonder just what it was catching fire on up there.