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Electrical Inspections Contains discussions about electrical systems. This includes receptacles, panels, wiring, etc.

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Old 3/6/13, 4:03 PM
Roy D. Cooke, Sr's Avatar
Roy D. Cooke, Sr Roy D. Cooke, Sr is offline
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Default Much old Electrical interesting info

http://www.dli.mn.gov/ccld/PDF/eli_GFCI_history.pdf

The origins of the twist-on wire connector are obscure, but references to their use can be found since the early 1920s. Originally called "porcelain connectors," twist-on connectors are often referred to by the industry name "wire-nut," which has been the trademark of Ideal Industries since 1939. The early twist-on connectors were made of porcelain and similar inorganic materials, and did not contain an inner spring (see Fig. 12). By 1930 plastic Bakelite connectors were beginning to appear, and by the 1940s inner springs were added to better twist and more securely capture the conductors. By the late1960s thermoplastic (nylon, polypropylene, etc.) twist-on connectors were becoming common, and aluminum wire combinations were added to accommodate the increased use of aluminum wire. In the mid-1980s, enhanced requirements were added to the
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  #2  
Old 3/6/13, 5:03 PM
Humberto Carvajal's Avatar
Humberto Carvajal Humberto Carvajal is offline
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Default Re: Much old Electrical interesting info

Thank you Roy. Good reading..


Bert





Humberto Carvajal Jr.
Florida State Property Inspections, LLC
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  #3  
Old 3/6/13, 5:28 PM
David Hays David Hays is offline
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Default Re: Much old Electrical interesting info

I had never seen or heard of the wood base moulding type of wiring. Very interesting.


Thanks for the link!



David Hays
All Points Home Inspections LLC
Denver, CO
720-670-0366
allpointshomeinspect@yahoo.com
www.allpointshomeinspections.org
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  #4  
Old 3/6/13, 5:58 PM
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Default Re: Much old Electrical interesting info

Any time I see the old cloth cover I recommend replacement .
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