Image: Knob-and-tubes
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Description: An example of early knob and tube wiring. Note ceramic tubes to carry wire through wooden joists; knob to support wire turning a corner; and (illegal) splice with more modern (1940s-era) cloth-sheathed Romex cable.
Title: Knob-and-tubes
Credit: Own work
Author: me
Permission: CC-BY-SA-2.5
Usage Terms: Creative Commons Attribution-Share Alike 2.5
License: CC BY-SA 2.5
License Link: http://creativecommons.org/licenses/by-sa/2.5
Attribution Required?: Yes
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