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Electrical Contains discussions about electrical systems. This includes outlets, panels, wiring, et cetera.

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  #1  
Old 7/18/08, 7:17 AM
Douglas Cossar Douglas Cossar is offline
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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



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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



Virtue is more to be feared than vice, because its excesses are not subject to the regulation of conscience.
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  #3  
Old 7/18/08, 10:19 AM
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Marcel R. Cyr Marcel R. Cyr is offline
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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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  #4  
Old 7/18/08, 10:26 AM
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Gerry Beaumont Gerry Beaumont is offline
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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



Virtue is more to be feared than vice, because its excesses are not subject to the regulation of conscience.
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  #5  
Old 7/18/08, 11:46 AM
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Marcel R. Cyr Marcel R. Cyr is offline
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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
Douglas Cossar Douglas Cossar is offline
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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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  #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



Virtue is more to be feared than vice, because its excesses are not subject to the regulation of conscience.
Adam Smith (1723-1790)

Commercial property Inspection Tampa, Orlando, Sarasota, Jacksonville, Ft Launderdale, Miami, Florida.
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  #8  
Old 7/18/08, 4:12 PM
Douglas Cossar Douglas Cossar is offline
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Default Re: Can anyone tell me when

Excellent info thanks Gerry

Cheers



Doug Cossar CMI, PHPI
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  #9  
Old 7/18/08, 4:18 PM
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Gerry Beaumont Gerry Beaumont is offline
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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



Virtue is more to be feared than vice, because its excesses are not subject to the regulation of conscience.
Adam Smith (1723-1790)

Commercial property Inspection Tampa, Orlando, Sarasota, Jacksonville, Ft Launderdale, Miami, Florida.
NACHI cell 484-429-5466
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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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Marc D. Shunk Marc D. Shunk is offline
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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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Old 7/18/08, 6:43 PM
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Marcel R. Cyr Marcel R. Cyr is offline
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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
Greg Fretwell Greg Fretwell is offline
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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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Gerry Beaumont Gerry Beaumont is offline
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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



Virtue is more to be feared than vice, because its excesses are not subject to the regulation of conscience.
Adam Smith (1723-1790)

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
Marcel R. Cyr's Avatar
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




Cyr Home and Commercial Property Inspections

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