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

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  #1  
Old 7/18/08, 7:17 AM
Douglas Cossar's Avatar
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Default Can anyone tell me when

they started using three wire Romex (grounded) in res construction?

I think I know this but I'm having a senior's moment
Cheers



Doug Cossar CMI, NHI
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  #2  
Old 7/18/08, 9:59 AM
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Default Re: Can anyone tell me when

Quote:
Originally Posted by dcossar
they started using three wire Romex (grounded) in res construction?

I think I know this but I'm having a senior's moment
Cheers
Hi Doug I belive type NM (thermoplastic) "romex" started in the early 1960's

Regards

Gerry



"To realize our true destiny, we must be guided not by a myth from our past, but by a vision of our future."
(Mark B Adams)

Commercial property Inspection Tampa, Orlando, Sarasota, Jacksonville, Ft Launderdale, Miami, Florida.
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  #3  
Old 7/18/08, 10:19 AM
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Default Re: Can anyone tell me when

Quote:
Originally Posted by gbeaumont
Hi Doug I belive type NM (thermoplastic) "romex" started in the early 1960's

Regards

Gerry
Hi. Gerry

I found this in http://en.wikipedia.org/wiki/Electri...wiring_methods


About 1950, PVC insulation and jackets were introduced, especially for residential wiring. About the same time, single conductors with a thinner PVC insulation and a thin nylon jacket became common.

Marcel
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Old 7/18/08, 10:26 AM
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Default Re: Can anyone tell me when

Quote:
Originally Posted by mcyr
Hi. Gerry

I found this in http://en.wikipedia.org/wiki/Electri...wiring_methods


About 1950, PVC insulation and jackets were introduced, especially for residential wiring. About the same time, single conductors with a thinner PVC insulation and a thin nylon jacket became common.

Marcel
Hi Marcel, thanks for that, I knew the "romex" brand started in the 1920's with the rubber and cloth braided stuff, but I didn't know that the thermoplastics started that early, I have never seen in in an unimprooved home built before the early 60's.

I see it mostly from when outlet grounds were required which I think was 1963.

Here's a link to the history of Romex

Regards

Gerry



"To realize our true destiny, we must be guided not by a myth from our past, but by a vision of our future."
(Mark B Adams)

Commercial property Inspection Tampa, Orlando, Sarasota, Jacksonville, Ft Launderdale, Miami, Florida.
NACHI cell 484-429-5466
NACHI02121106

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  #5  
Old 7/18/08, 11:46 AM
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Default Re: Can anyone tell me when

Thanks for the Link Gerry.

1922 whow! You must remember that don't you. ha. ha.

Marcel
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  #6  
Old 7/18/08, 12:15 PM
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Default Re: Can anyone tell me when

Quote:
Originally Posted by gbeaumont
Hi Marcel, thanks for that, I knew the "romex" brand started in the 1920's with the rubber and cloth braided stuff, but I didn't know that the thermoplastics started that early, I have never seen in in an unimprooved home built before the early 60's.

I see it mostly from when outlet grounds were required which I think was 1963.

Here's a link to the history of Romex

Regards

Gerry
Thanks Gerry... sooooo grounded outlets were first required in 1963?

Cheers



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Services Inc.
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  #7  
Old 7/18/08, 12:56 PM
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Default Re: Can anyone tell me when

Quote:
Originally Posted by dcossar
Thanks Gerry... sooooo grounded outlets were first required in 1963?

Cheers
That requirement came in in the 1962 NEC, so was locally adopted in 1963/4 in most cases.

There is a nice history of residential wiring here

Regards

Gerry



"To realize our true destiny, we must be guided not by a myth from our past, but by a vision of our future."
(Mark B Adams)

Commercial property Inspection Tampa, Orlando, Sarasota, Jacksonville, Ft Launderdale, Miami, Florida.
NACHI cell 484-429-5466
NACHI02121106

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  #8  
Old 7/18/08, 4:12 PM
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Default Re: Can anyone tell me when

Excellent info thanks Gerry

Cheers



Doug Cossar CMI, NHI
Accurate Home Inspection
Services Inc.
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  #9  
Old 7/18/08, 4:18 PM
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Default Re: Can anyone tell me when

Quote:
Originally Posted by dcossar
Excellent info thanks Gerry

Cheers
You're welcome, just remember what I have quoted is from the U.S. Canadian code may be a bit different.

Regards

Gerry



"To realize our true destiny, we must be guided not by a myth from our past, but by a vision of our future."
(Mark B Adams)

Commercial property Inspection Tampa, Orlando, Sarasota, Jacksonville, Ft Launderdale, Miami, Florida.
NACHI cell 484-429-5466
NACHI02121106

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  #10  
Old 7/18/08, 6:14 PM
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Default Re: Can anyone tell me when

Quote:
Originally Posted by gbeaumont
That requirement came in in the 1962 NEC, so was locally adopted in 1963/4 in most cases.

There is a nice history of residential wiring here

Regards

Gerry
That's good reading! Thanks Gerry.
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  #11  
Old 7/18/08, 6:16 PM
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Default Re: Can anyone tell me when

I don't know about the ground wire itself, but the "reduced ground" went away in 1969. I know I've worked on wiring from the late 50's that had a ground wire in it, but installers often had no idea what to do with it. Regrettably, it was often just cut off flush with the jacket.
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  #12  
Old 7/18/08, 6:43 PM
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Default Re: Can anyone tell me when

Quote:
Originally Posted by gbeaumont
You're welcome, just remember what I have quoted is from the U.S. Canadian code may be a bit different.

Regards

Gerry
Hey, I thought you were Brit. all this time.
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  #13  
Old 7/18/08, 8:28 PM
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Default Re: Can anyone tell me when

We lived in a house built in 1952-53 PG county, right over the DC line. It had the reduced size ground wire in an asphalt/paper jacket Romex and SqD breaker panel.
My father said it had to do with "GI" inspection. I assume from what I have heard fom around the country, this may have only been enforced near DC.
I know when I bought my first house in 71, the builder said it wouldn't go "GI" (aluminum wire) but by then you could get cheaper financing from a regular bank.
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  #14  
Old 7/18/08, 8:33 PM
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Default Re: Can anyone tell me when

Quote:
Originally Posted by Marc D. Shunk
I don't know about the ground wire itself, but the "reduced ground" went away in 1969. I know I've worked on wiring from the late 50's that had a ground wire in it, but installers often had no idea what to do with it. Regrettably, it was often just cut off flush with the jacket.
I have to admit to having written up a couple of reduced grounds years ago before I new that they had previously been allowed

I had forgotten all about them again until just now.

Regards

Gerry



"To realize our true destiny, we must be guided not by a myth from our past, but by a vision of our future."
(Mark B Adams)

Commercial property Inspection Tampa, Orlando, Sarasota, Jacksonville, Ft Launderdale, Miami, Florida.
NACHI cell 484-429-5466
NACHI02121106

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  #15  
Old 7/18/08, 8:41 PM
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Marcel R. Cyr Marcel R. Cyr is offline
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Default Re: Can anyone tell me when

Hey Mark and Gerry, that is exactly the wiring in my own house.

The old 14/2 with ground conductor 16 gauge and all cut off at the jacket.
Some I was able to fix with the slack and some are not.

House was built in 1967. And the wiring romex is still the cloth fabric type. I forget the word for it already.

Marcel
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