QOD for 10/23/08 Electrical

[gbeaumont]

Hi to all,

OK this one is going to be fun

The correct answer is 1940's

Homes built before the 1960’s had most of their original 125 V receptacle outlets of the non-grounding type (2-prong) (see Fig. 14). In 1947, the Code first required grounding type (3-prong) receptacles for the laundry. In 1956 the required use of grounding type receptacles was extended to basements, garages, outdoors and other areas where a person might be standing on ground. Finally, in 1962 the Code was revised to require all branch circuits to include a grounding conductor or ground path to which the grounding contacts of the receptacle must be connected. That effectively discontinued the use of non-grounding type receptacles except for replacement use in existing installations were a grounding means might not exist.

Regards

Gerry

[Barry Adair]

Originally Posted by gbeaumont

Hi to all,

OK this one is going to be fun

The correct answer is 1940's



Regards

Gerry

Gerry,

This isn't the first or last time this chump has been stumped.
Thanks for the education, I guess

[gbeaumont]

Originally Posted by badair

Gerry,

This isn't the first or last time this chump has been stumped.
Thanks for the education, I guess

Hi mate, you're far from being alone on that one, in fact if I had been answering that question prior to this week I would have also got it wrong, I knew the outside 3 pins went back to the 50's, but I don't think I ever read about the laundry issue prior to that.

I guess we all learn something, ain't that the way it should be?

Regards

Gerry

[Christopher Currins]

I didn't know they had washing machines and dryers in the 40's.

[James F. McKee]

good question and information ...not that i or anyboby else got it right are You planning on making us look stupid again tomorrow Gerry ?????

[Marcel R. Cyr]

Originally Posted by gbeaumont

Hi mate, you're far from being alone on that one, in fact if I had been answering that question prior to this week I would have also got it wrong, I knew the outside 3 pins went back to the 50's, but I don't think I ever read about the laundry issue prior to that.

I guess we all learn something, ain't that the way it should be?

Regards

Gerry

Thanks Gerry and nice talking to you last night.
These things of the like educate all of us at the same time.
I also, learned something from this that I was not aware of.

Though it might look like we feel ignorant to some of these facts, it all helps us indirectly to make better informed Home Inspectors.

Hope there is more to come.

Thanks

Marcel

[James F. McKee]

thanks Gerry ...this was a great question...when we all get a chance to learn...everybody wins....

[Brian E. Kelly]

Great question Gerry

[James F. McKee]

I am just amazed that people keep voting wrong many hours fter the correct answer was posted...in my own defense I voted wrong before the correct answer was posted...lol....jim

[Marcel R. Cyr]

Originally Posted by jmckee

I am just amazed that people keep voting wrong many hours fter the correct answer was posted...in my own defense I voted wrong before the correct answer was posted...lol....jim

Jim, look again, I had forgot to vote. Now there is one correct answer.

I am with you though, My vote would have been 1960.

Hey, I win.

Marcel

[cduphily]

Originally Posted by badair

Gerry,

This isn't the first or last time this chump has been stumped.
Thanks for the education, I guess

Well said, and .... um... Ditto!

[cduphily]

Originally Posted by jmckee

I am just amazed that people keep voting wrong many hours fter the correct answer was posted...in my own defense I voted wrong before the correct answer was posted...lol....jim

If I had answered prior to reading the link G-man provided I would of said the 60's.

I almost voted before edumacating (I'm is a college drop out ya know) myself as well .... look at it from this perspective - answer the question with your current knowlege then research the answer. Some feel they learn more this way. Plus it's not a graded test or certification.

[Paul W. Abernathy]

The three prong plug was invented by Philip F. Labre, while he was attending the Milwaukee School of Engineering (MSOE). It is said that his landlady had a cat which would knock over her fan when it came in the window. When she plugged the fan back in, she would get an electric shock. Labre figured out that if the plug were grounded, the electricity would go to earth through the plug rather than his landlady. He applied for and was issued a patent for grounding receptacle and plug on June 5, 1928.[4] As the need for safer installations became apparent, earthed three-contact systems were made mandatory in most industrial countries.

lol...the above was copied from WIKI something....anyway I enjoyed reading it but when i read that electricity is going to the earth i CRINDGE.....I am sure that was their intent early on.....then realized that as the requirements of OCPD's came onto the techno front....they learned that the EGC was more for clearing OCPD's and so on and that electricity is NEVER trying to get to the earth..but in fact is trying to get to the source of its "creation" ( ie: transformer in most cases, Generators in other cases )

Anyway...I found it rather interesting that it was being thought of and contemplated back in the 20's even.


Ironically enough I read where the first grounded receptacle was in the 1951 NEC-

Homes built prior to the early 1960′s were most commonly wired with a two-wire system, absent of the modern third wire being an equipment ground wire. The first requirement for grounded receptacles in residential construction dates back to 1951 when the NEC® (National Electrical Code) required laundry areas to have grounded receptacles. Devices and locations have been added to this requirement until the grounded system is a requirement throughout a modern residential home.

go figure!

[Mark E. Northrup]

The 1970"s