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    Oneill474's Avatar
    Oneill474 Posts: 427, Reputation: 2
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    #1

    Nov 23, 2008, 04:06 PM
    Tube and knob wiring
    Just wondering what Tube And Knob wiring is. My house was constructed in 1952.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Nov 23, 2008, 04:15 PM
    Knob and tube wiring - Wikipedia, the free encyclopedia
    KBC's Avatar
    KBC Posts: 2,550, Reputation: 487
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    #3

    Nov 23, 2008, 04:18 PM

    Ceramic tubes to route knob and tube electrical wires through building framing members:

    Wherever the knob and tube circuit wires pass through building framing lumber a ceramic tube is used to insulate the wire from the wood.

    These thick ceramic tubes are a good insulator separating electrical wire from wood - if both are un-damaged.

    Ceramic knobs to support knob and tube electrical wires passing over building framing surfaces: Where the knob and tube wiring is surface mounted in a building it is attached using a ceramic "knob".

    These ceramic knobs are a good insulator provided they have not been damaged or modified.
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