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Knob and Tube - early electrical insulation

EdisonTechCenter TechCenter
87.2K subscribers
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Knob and Tube - early electrical insulation
4.4KLikes
372,393Views
2013Mar 12
In the time of Thomas Edison we used pocelain insulators "knob and tube" system. Rick DeLair shows us a working model with cleats, tubes and a 100+ year old light bulb with switch. John Harnden explains the influence of Czech pottery makers (Cermak Family) on development of insulators.

Follow along using the transcript.

EdisonTechCenter TechCenter

87.2K subscribers