Code History -- Reduced Size Ground Conductors Okay - Electrical - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 05-07-2011, 08:03 PM   #1
Member
 
Join Date: Apr 2011
Posts: 87
Rewards Points: 75
Default

Code History -- Reduced size ground conductors okay


I know that currently grounding conductors in NM cables (Romex) need to be the same size as the current carrying conductors. I also have seen older wiring where the ground is sized smaller. This was common in the 1960's. Does anyone know when the code was changed?

Advertisement

Perry401 is offline   Reply With Quote
Old 05-08-2011, 05:14 AM   #2
" Euro " electrician
 
frenchelectrican's Avatar
 
Join Date: Apr 2006
Location: WI & France { in France for now }
Posts: 5,369
Rewards Points: 2,000
Default

Code History -- Reduced size ground conductors okay


Quote:
Originally Posted by Perry401 View Post
I know that currentlly grounding conductors in NM cables (Romex) need to be the same size as the current carrying conductors. I also have seen older wiring where the ground is sized smaller. This was common in the 1960's. Does anyone know when the code was changed?
I think it was in 1973 or little before that I may check with one guy he know the history on that so I may ask him for backtrack a littel to see how far it was but IIRC it was about the same time the older Alum branch conductors were no longer legit { old #12 , #10 AWG AL only }

Merci,
Marc

Advertisement

__________________
The answer will be based on NEC ( National Electrical code ) or CEC ( Cananda Electrical code ) or ECF ( Electrique Code France )
frenchelectrican is offline   Reply With Quote
Old 05-08-2011, 05:43 AM   #3
A "Handy Husband"
 
rjniles's Avatar
 
Join Date: Feb 2007
Location: South Carolina Low Country
Posts: 4,222
Rewards Points: 2,354
Default

Code History -- Reduced size ground conductors okay


In 1977 I was building a cottage in western Mass. NM cable with the smaller ground was still being used. Common practice was to wrap the ground back along the cable sheath and secure with the clamp of the metal box.

Al cable was also being used for small branch circuits, I passed on that.
__________________
Location:
Coastal South Carolina
rjniles is online now   Reply With Quote
Old 05-08-2011, 08:49 AM   #4
Member
 
Join Date: Mar 2007
Location: Eighty Four, Pa.15330
Posts: 1,398
Rewards Points: 794
Default

Code History -- Reduced size ground conductors okay


Joe Tedesco would know!
bobelectric is online now   Reply With Quote
Old 05-08-2011, 10:28 AM   #5
Member
 
Join Date: Sep 2008
Location: Massachusetts
Posts: 270
Rewards Points: 250
Default

Code History -- Reduced size ground conductors okay


Ahhh the wrapping of the ground. I've heard it called the Boston back wrap but I'm not sure where it originated.
teamo is offline   Reply With Quote
Old 05-08-2011, 10:36 AM   #6
A "Handy Husband"
 
rjniles's Avatar
 
Join Date: Feb 2007
Location: South Carolina Low Country
Posts: 4,222
Rewards Points: 2,354
Default

Code History -- Reduced size ground conductors okay


Quote:
Originally Posted by teamo View Post
Ahhh the wrapping of the ground. I've heard it called the Boston back wrap but I'm not sure where it originated.
Brings back memories but that is what it was called:

http://www.contractortalk.com/f32/bo...ck-wrap-16273/

Don't replay to the thread on ContractorTalk - it is old.

Advertisement

__________________
Location:
Coastal South Carolina
rjniles is online now   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
ground - up or down - new code? Potomac101 Electrical 25 03-07-2008 10:45 AM
Conduit, above ground, code question davewest Electrical 6 02-27-2008 04:55 PM
Sub Panel Grounding Question. RobertS Electrical 63 02-27-2008 02:50 PM
Hot Tub Install--Grounding Rod Question statgeek_rob Electrical 16 09-15-2007 03:59 AM
Subpanel feeder questions Silhanek Electrical 4 03-22-2007 07:30 PM




Top of Page | View New Posts