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).]
"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"
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.
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.