Raintight Enclosure

Status
Not open for further replies.
J

JES2727

Senior Member
Location
NJ
Is the inside of a raintight enclosure considered a wet location? Is it acceptable to use FMC inside such an enclosure? Specifically, on a generator installation, is it ok to use "greenfield" to come from the stub-ups in the slab to the breaker enclosure? I believe 348.12(1) says it's ok, if I use THHN/THWN and if the generator enclosure is raintight. But I could be wrong, I've been wrong before.
Thanks.
 
IMHO the inside of a raintight enclosure is a wet location and therefore FMC would not be permitted. Why not use LFNC or LFMC?
 
C3PO said:
IMHO the inside of a raintight enclosure is a wet location
Click to expand...

Then the manufactures of that enclosure should talk to thier engineers. If it's wet inside it's not raintight.
 
C3PO said:
IMHO the inside of a raintight enclosure is a wet location and therefore FMC would not be permitted. Why not use LFNC or LFMC?
Click to expand...

..and a review of the definitions of Locations, Damp, Dry, and Wet, would help.

Art. 100.

Good stuff.
 
A Nema 3R enclosure which most people around here call "rain tight" is in reality nowhere even close to being raintight.

Bob, I understand what you are saying about the fuses and breakers, but here is what seems funny to me.

You can have a piece of conduit in a wet location run into a raintight box in a wet location. The inside of the conduit is considered a wet location (300.9) but the inside of the box is not? It just seems wierd to me. :-? :-?
 
C3PO said:
The inside of the conduit is considered a wet location (300.9) but the inside of the box is not? It just seems weird to me. :-? :-?
Click to expand...

A bit strange yes, till you consider a conduit can fill and hold water for long periods of time. A 3R enclosure will drain.
 
chris kennedy said:
Tonight is 25? wing night.
Click to expand...

Hook me up

quarters.jpg
 
Thanks for the replies. I'll take a few dollars worth of those wings. And I'll leave the greenfield in the generator enclosure.
 
The NEMA standard for a 3R permits water to enter the enclosure as long as it doesn't get on the exposed live parts. That is why you can use standard locknuts or connectors to enter the enclosure below the exposed live parts.
 
Status
Not open for further replies.
Top