what year: grounds and neutrals on seperate bars in sub panels?

[68Malibu383]

Hi,
Can anyone tell me what year ground and neutral wires were required to be on separate/isolated buss bars in sub panels?

 

[Cleveland Apprentice]

I'm guessing '84 or '87 code

 

[resistance]

Not sure where you get the 1984 or 87 answer? I wasn’t born, but I believe it was in 1923.

 

[Cleveland Apprentice]

I was too young. Couldn't rem
ember. My bad.

 

[resistance]

No problem!!! As I said, ?I believe?!! Sure we have someone around that age here?..:lol:

 

[jxofaltrds]

Think it was 1934.

 

[68Malibu383]

Odd. Most houses (I'd guess 90%) I inspect in NC built in the 60's and prior have a three wire (or two, if you'd like) feed (two hots and a neutral) from the main panel to the sub panel. No ground wire and only one buss bar for both neutrals and grounds.

 

[JDB3]

Around 1981 the panel size was increased, & then (like said before) around mid 80's the grounds & neutrals were split in sub panels.

 

[480sparky]

1968 contained a new article, 384-27. It is now 408.20.

I have compiled a database of certain Code references and what numbers they were in previous NEC editions. If you can view Excel files, you can download a copy of it here.

 

[readydave8]

I also see many subpanels with neutral and ground on same bar, enforcement is the difference, until late 90's we did not have county inspections, some think that rules changed in cases where rule hadn't changed, enforcement changed.

 

[resistance]

I did some research, and found this topic:http://www.mikeholt.com/forum/Forum1/HTML/003455.html

Note: One poster (3rd one down from the top) posted something about the topic in question.

 

[Dennis Alwon]

1968 contained a new article, 384-27. It is now 408.20.

I have compiled a database of certain Code references and what numbers they were in previous NEC editions. If you can view Excel files, you can download a copy of it here.

408.20 ???? Location of switchboards??

 

[weressl]

Hi,
Can anyone tell me what year ground and neutral wires were required to be on separate/isolated buss bars in sub panels?

I can't tell for sure, but I have heard that one of the CMP members were named Moses.....:lol:

 

[DelightedInYahweh]

1968 contained a new article, 384-27. It is now 408.20.

I have compiled a database of certain Code references and what numbers they were in previous NEC editions. If you can view Excel files, you can download a copy of it here.

WOW!! thanks sparky