I look at these fitting like 90° FMC or LFMC connectors which are installed after the conductors are pulled. Pulling condcutors through such a short radius when using these for a complete raceway could damage the conductors. Like I said prior I think that the concealed part is open to debate. In your application I don't see conductor damage as an issue.
But since RMC isn't flexible, if you install the short radius elbow after the conductors are pulled, you'd also need to be able to shift the conduit run or the enclosure in order to thread it on. And how do you avoid twisting up the conductors as you thread the elbow on over the conductors?
Just for sake of conversation, wouldn’t that be prohibited by code? The raceway has to be complete before you install the conductors.
I've never understood, or liked this rule. It's hard as heck to pull conductors through some raceways, such as LFNMC, and some cases PVC. Many times I pulled conductors through a long run of PVC but left off the connectors/fittings, such as 90's, then put them on after the pull is done. I don't see any reason that is unsafe. There could be damage pulling hard through 90's though.
Wait, what? If you take it apart then it’s not complete.
Like I said, it makes no sense. Not necessarily what infinity said, but the whole rule.
What I'm saying is that there are instances where completed raceways will need to be disassembled to actually install the condcutors.
But 300.18 won't allow that. I don't agree with it, but that's the way it is. There is no exception saying that you can complete a raceway and then disassemble it to install conductors.
Re-read post #26 and tell me how you would do that without removing the 90?
This is one of the thousand contentions I’ve had with the code. But still, the code is the code, correct? So the answer is that you can't do an installation like you proposed in post #26, you have to come up with another way to install it.
No the opposite is true. Logic will dictate in the example I provided that you cannot use the listed raceway and listed fitting without taking some portion of the completed raceway apart.
As I said, logic doesn’t matter. You know that, and I’m sure you’ve encountered hundreds of examples over the years. The code is the code, and what you proposed is prohibited by code.
