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Residential Wiring History

thread741-38143

Residential Wiring History

Residential Wiring History

(OP)
When did these residential wiring changes happen?  Become code or manufacturers changed products?  

1. From screw-in sockets to 2-prong receptacles?

2. From two-prong receptacles to polarized plug and receptacle?

3. To 3-prong (grounded) plugs & receptacles?

4. GFI's required in bathroom & kitchen?

5. Anything else along those lines that might be interesting?

THANKS!!!!

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