1 members (Scott35),
520
guests, and
18
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
|
Joined: Apr 2004
Posts: 60
OP
Member
|
Has anyone noticed the subtle deletion of "severe" from 250.64? The way I read it now, you need to protect GEC's sized 4 and larger from physical damage whereas previously it only had to be protected from severe physical damage. We may end up needing to put just about every GEC in conduit...
[This message has been edited by markp (edited 09-07-2005).]
Mark Kent, WA
|
|
|
|
Joined: Aug 2003
Posts: 1,374
Moderator
|
Thats a great catch! Nicely done!
Ryan Jackson, Salt Lake City
|
|
|
|
Joined: Jul 2004
Posts: 9,931 Likes: 34
Member
|
"Exposed to physical damage" is always going to be a judgement call. This change has certainly tossed some mud in the water. Basically if you can't run the #4 without a raceway, you can't run it is PVC either because that says 352.10(F) Exposed. For exposed work where not subject to physical damage if identified for such use"
Greg Fretwell
|
|
|
|
Joined: Jan 2005
Posts: 91
Member
|
And yet 250-64(b) seems to imply that a #6 or smaller can be protected with PVC if exposed to physical damage.
|
|
|
|
Joined: Dec 2004
Posts: 1,064
Member
|
Someone explain to me how a GEC Indoors, behind a transformer, going up a wall, would be exposed to physical damage?
Or for that matter, how does a GEC originating in a panel, going up to building steel, get damaged?
Dnk...
|
|
|
|
Joined: Jul 2004
Posts: 9,931 Likes: 34
Member
|
Dnk, I think we all agree there are places where a wiring method is not subject to any physical damage. This question pertains to the difference between severe physical damage and <some other kind of> physical damage. This is just going to be a judgement call.
Greg Fretwell
|
|
|
|
Joined: Dec 2004
Posts: 1,064
Member
|
I know G, just curious if any one has seen this happen and how.
I can't imagine how a GEC can be damaged, other than blatant negligence.
Dnk...
|
|
|
|
Joined: Jul 2004
Posts: 9,931 Likes: 34
Member
|
Usually GECs get damaged by lawn mowers or other equipment running up next to the wall from what I see. I can't see a problem inside a building unless it is a shop or warehouse where there is some heavy material being stored against or moving by an unprotected run.
Greg Fretwell
|
|
|
|
Joined: Nov 2005
Posts: 7
Junior Member
|
Does GEC stand for grounding equipment conductor? I am used to seing as EGC. I guess its probably which coast you live on.
|
|
|
|
Joined: Oct 2004
Posts: 265
Member
|
GEC = Grounding electrode conductor EGC = Equipment grounding conductor
GEC is for connecting your grounding electrodes together to form your grounding electrode system.
EGC is the wire/conduit to bond equipment.
[This message has been edited by dmattox (edited 11-06-2005).]
|
|
|
Posts: 46
Joined: March 2013
|
|
|
|