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#3729 - 08/27/01 08:38 PM Grounded receptacles  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
As you may have gathered, I'm quite interested in the development of wiring over the years, so I'm afraid I'm going to ask another "When did...." question.

From the various posts here and from several U.S. radio books I have, I understand that there are still quite a lot of homes fitted with non-grounded outlets.

From what date did the NEC require new wiring to use grounding receptacles?


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#3730 - 08/27/01 08:50 PM Re: Grounded receptacles  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,306
well i would only be guessing, anyone have older NEC references here???
[Linked Image]


#3731 - 08/28/01 05:01 PM Re: Grounded receptacles  
Tom  Offline
Member
Joined: Jan 2001
Posts: 1,044
Shinnston, WV USA
The oldest code book I have is 1978 & grounding type receptacles were required on 15 & 20 amp branch circuits (210-7(a)).

Seems to me that when I started my apprenticeship (73) everything was grounded but I had seen some fairly new houses that only had grounded outlets in the bathrooms & kitchens.

Maybe someone with a few older code books could narrow it down for us.

Sure wish someone would write a good "History of the NEC."

Tom


Few things are harder to put up with than the annoyance of a good example.

#3732 - 08/28/01 05:32 PM Re: Grounded receptacles  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Quote
Originally posted by Tom:
The oldest code book I have is 1978 & grounding type receptacles were required on 15 & 20 amp branch circuits (210-7(a)).
Seems to me that when I started my apprenticeship (73) everything was grounded but I had seen some fairly new houses that only had grounded outlets in the bathrooms & kitchens.


I have a U.S. book I picked up my travels dating from 1977 and that specifies grounding recepts. as an NEC requirement, so I knew it must have been earlier than that.

Didn't want to put a date into anyone's mind, but the reason I asked was I seem to recall seeing 1967 or 1968 in a book I read while over there. I wasn't sure if I was imagining it though, because our rules changed in 1967 to require grounds on lighting circuits.

Sounds as though that date could line up with you seeing fairly new houses in 1973 with ungrounded outlets in some rooms.

Quote
[B}
Sure wish someone would write a good "History of the NEC."
[/B]


Often thought that a similar history of our IEE Regs. would be interesting. First editon came out in 1880 or 1890-something! Oldest edition I have is 1966, although I do have some reference to the previous edition in other books.


#3733 - 08/29/01 10:02 AM Re: Grounded receptacles  
Mike  Offline
Member
Joined: Feb 2001
Posts: 62
I once owned a house that was built in 1964 that had grounding type receptacles.


#3734 - 08/29/01 07:27 PM Re: Grounded receptacles  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA
My parent's home had grounding recps. in only the kitchen, garage, laundry, & bath.
Built 1963 (are we getting closer?)



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