Green Ground Screw
- Thread starter blief
- Start date
- Status
electricman2
Senior Member
- Location
- North Carolina
- Occupation
- Retired Electrical Contractor
I wonder if Edison used green ground screws?
izak
Senior Member
- Location
- Springfield, MO
edison didnt ground his systems; he was too busy trying to prove how dangerous A/C current is that he couldnt think about safety issues
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
izak said:
Yikes!
"This is a message from your department of redundancy department."
Just funnin' ya'!
electricman2
Senior Member
- Location
- North Carolina
- Occupation
- Retired Electrical Contractor
LarryFine said:
Kind of like PIN number, huh?
boboelectric
Senior Member
- Location
- Eighty Four,Pa.15330
green ground screw
green ground screw
Pittsburgh,Pa. inspectors want GREEN screws.
Bob O.84,Pa.
green ground screw
Pittsburgh,Pa. inspectors want GREEN screws.
Bob O.84,Pa.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
boboelectric said:
They can want them but they aren't required which makes their "want" unenforceable.
Minuteman
Senior Member
- Location
- The Sooner Nation
iwire said:Roger you will not find a section in the NEC that says a regular screw is acceptable.
However you will not find a section in the NEC that says a regular screw is not acceptable.
The NEC does require that the grounding screws on devices (plugs, outlets, connector bodies, etc,) be green. This can be found in 250.126.
Another section to look at is 250.8
In my opinion this section is somewhat contradictory.
It says we must use listed means.
Two problems with that
1) There is no such thing as a 'listed' green grounding screw.
2) If we are limited to 'listed' hardware there should be no need to say Sheet metal screws shall not be used to connect grounding conductors to enclosures.
Personally I often use the clamp screws after removing the clamp.
Let the battle begin. :lol:
Yuck! That just looks wrong.
- Location
- Massachusetts
Minuteman said:
Thanks
And this looks 'right'?
How about a side by side look.
Typically we use the clamp screw but we normally use deep 4" squares with MC clamps.
I used the old work box in my photos as it was easy to show a 'cut away'
- Location
- New Jersey
- Occupation
- Journeyman Electrician
iwire said:Thanks
And this looks 'right'?
How about a side by side look.
Typically we use the clamp screw but we normally use deep 4" squares with MC clamps.
I used the old work box in my photos as it was easy to show a 'cut away'
I like your method Bob. We usually use self grounding receptacles so the tail to the device isn't needed.
- Location
- Massachusetts
infinity said:
Most we use are self grounding but company policy is to always use a copper jumper.
If you read the job specs you may find many times you should be as well.
Most of the specs I see require the use of copper EGCs regardless of the other NEC compliant methods available.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
iwire said:
Around here we still have engineers specifying AC cable. You're are correct, some specs call for a copper bonding jumper.
- Location
- Massachusetts
infinity said:
That must be nice combined with self grounding devices.
I sometimes miss AC, I installed a lot in the 80s doing condos.
Minuteman
Senior Member
- Location
- The Sooner Nation
The problem I have that the clamp screw is listed as a clamp screw and not a ground screw. Could you not do the exact same thing (strip a section of the green wire to go under a green screw, then connect it to the device's green screw)?
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Minuteman said:
Sure you could, if you had a green screw. The clamp screw is already in the box. Screws for EGC's do not have to be listed.
- Location
- Massachusetts
infinity said:
As a matter of fact those packages of green ground screws that we can buy are not UL listed at all.
- Location
- Massachusetts
celtic said:Is there really the required 6" of free conductor here:
Yes, there was at least 6" of free conductor in the box before termination.
Once you terminate the black and white on the outlet they are not free either.
- Status