How do you make a watertight connection between PVC conduit and a metal enclosure?

[infinity]

Just like a lot of things, ...they have only been evaluated for use with rigid or IMC.
From the UL Guide Information for "conduit fittings (DWTT)"

What does the UL guide say about the standard RMC/IMC locknuts that we use on PVC terminal adapters, do they have a more broad use list?

 

[Installer]

I guess a PVC coated Meyers Hub would work?

 

[electrofelon]

Are you using Sch 80 ?

Very rarely. Does my schedule preference matter or does Samual Alito have a say in that?

 

[don_resqcapt19]

What does the UL guide say about the standard RMC/IMC locknuts that we use on PVC terminal adapters, do they have a more broad use list?

The UL Guide Information for Conduit Fittings (DWTT), does not directly address that but implies that standard locknuts can be used on an fitting having male threads.

 

[Rick 0920]

Take a look at the rubber "O" ring on a Carflex connector. They are 100% plastic also so this ring obviously is listed for that use.

 

[MTW]

This is the style I use when I need a reliable seal. Stainless molded with rubber.
Conforms to:
• UL 514B, Fittings for Cable and Conduit
– File: E23018 Trade sizes from 3/8" to 4"

www-public.tnb.com/shared/msds/TDS000232.pdf

 

[farmantenna]

Do they make O-rings for PVC terminal adapters? Maybe they do make them but I've never seen a TA that came with an O- ring.

they do. made by Carlon google it. I just go to hardware store and get them but show the inspector Carlons catalog.

 

[farmantenna]

Yes the PVC conduit manufacturers make them specifically for this purpose, but if I remember correctly they are only available up to 2 in. I have actually never seen or used one however.

make all sizes

 

[farmantenna]

I will mention that I went back to my CT cabinet installation that had a 1-1/2" (to meter)pvc TA WITH HARDWARE STORE o ring 2 months later and multiple rain storms and no signs of water.

 

[electrofelon]

they do. made by Carlon google it. I just go to hardware store and get them but show the inspector Carlons catalog.

I'm telling!

 

[electrofelon]

make all sizes

The carlon catalog matches with my memory and only shows them going up to 2 in.

 

[guschash]

I would nonmetallic sealtite with appropriate fittings

 

[SceneryDriver]

This is the style I use when I need a reliable seal. Stainless molded with rubber.
Conforms to:
• UL 514B, Fittings for Cable and Conduit
– File: E23018 Trade sizes from 3/8" to 4"

www-public.tnb.com/shared/msds/TDS000232.pdf

An architectural lighting vendor we work with uses this style of sealing ring for the KO's in their outdoor-rated power and data supplies. They're fantastic! Never a leak, even in some very demanding outdoor environments.



SceneryDriver

 

[BarryO]

NEMA 3R metal enclosures are not watertight; e.g., they have weep holes. They need to be splash proof and rain/snow proof, but that's it. Are we overthinking things? Especially since it sounds like this is an Article 800 circuit.

 

[tom baker]

An architectural lighting vendor we work with uses this style of sealing ring for the KO's in their outdoor-rated power and data supplies. They're fantastic! Never a leak, even in some very demanding outdoor environments.



SceneryDriver

I used lots of those sealing rings, carried on my work van up to 2” size