I think this is what the UL standard is trying to adhere too. I never really think of bare shield wire as the neutral anymore. That was the old days before my time. And I'm 57. In my eyes, I see bare copper as a ground only. So in short, its not a NEC thing. Its UL directive.
You lost me here. What does the neutral not being compromised have to do with clearing a fault? What would a wire type EGC do to resolve this?
My take is the damaged hot wire energized the load side of the gap in the EMT, but because the neutral was not damaged and did not also make contact with the EMT, there wan no fault-current pathway, and had there been a wire-type EGC, there would have been.
Thats the way I see it. The egc is suppose to be bonded at both ends. The neutral is only bonded to the ground on the supply side.
Should have been " . . . there was no . . . "
If the neutral was compromised at the same time, it would have been a direct short, and would have tripped the breaker even with the the egc open.
For flexibility, yes, but rigid (whole or sleeve) for direct contact.
It seems like I always get these renovation jobs that have poorly installed EMT, often half inch with a zillion fittings..... I actually can't remember a single time having a fault not clear immediately, always works like a charm for me even despite the often poor craftsmanship. I like the raceway as an EGC because you can see it, what I don't trust is all the wire EGC connections either poorly made or not made that you can't see.
And regardless of that, if you have not only forklift operators smashing into electrical raceways, but then the damage just sitting there unrepaired, you have far greater problems that a wire EGC is not going to fix.
AC casing is considered a ground. MC has to have a wire in it. But I get the point. When you crush either, they peal apart and stay continuous with continuity.
Had calls all the time from stores saying customers are getting shocked from touching a rack……..soooo
All the time huh? So you have this happen "all the time" and it's always a circuit with some compromised raceway with no wire EGC??
I know you're not addressing my comments, but I'll add this anyway:
I am also not against it, other than it often being a waste.
Go into any Home Depot and count how many pipes are damaged to the sales racks. Most of the stores I have seen where a wire egc is not pulled is in strong Union areas up north. There are some in the south, but it is rare.
Why is there electrical run to the sales racks? You talking in like the lighting section? If they are running pipe down to the shelving from the ceiling and there are pallets stored up there, seems like the problem is a horrible choice of size and/or type of raceway, not with whether or not it has a wire EGC in it.
