Weather tight Fitting

[Bigbri0104]

Hello Everyone,

Need a little assistance with selecting the proper fitting for a PVC service mast that will be installed on top of a weatherproof trough? thoughts would be appreciated.
I'm building the trough, Meters, Disconnects etc.. thanks

 

[don_resqcapt19]

A Carlon flat sealing washer used with a male adapter.

 

[Bigbri0104]

Thank you. Would a meyers hub work too? I was doing a little more research

 

[Buck Parrish]

Yes A Myers Hub is commonly used..

https://www.supplyhouse.com/Southwire-206-2-Zinc-Die-Cast-Rigid-Watertight-Hub-w-Insulated-Throat?utm_source=google_ad&utm_medium=Shopping_tm&utm_campaign=Shopping_TM_New_users&gad_source=1&gclid=CjwKCAjwydSzBhBOEiwAj0XN4KMa5RnfnYtcGeRzqpWQQtKcfAVG4b_iecprxWONdTx7-j50Mf1H8hoCYGYQAvD_BwE

 

[don_resqcapt19]

Thank you. Would a meyers hub work too? I was doing a little more research

While a common practice, some AHJs reject the conduit hubs with male PVC adapters because the conduit hubs have only been evaluated for use with the male threads of RMC.
From the UL Guide Information for "Conduit Hubs (DWTT)"

Fittings with internal female threads (e.g., hubs, conduit bodies, couplings) have only been investigated for use with threaded rigid conduit.

 

[qcroanoke]

While a common practice, some AHJs reject the conduit hubs with male PVC adapters because the conduit hubs have only been evaluated for use with the male threads of RMC.
From the UL Guide Information for "Conduit Hubs (DWTT)"

Correct! We beat this to death about every 2 months.
Technically it's against code but rarely enforced.

 

[LarryFine]

How about a metallic close nipple and a PVC female adapter?

 

[roger]

but rarely enforced.

And rightfully so.

 

[Bigbri0104]

I want it to look professional. If i were to install a myers hub, first I would need to install a bonding bushing on the inside of the trough,( because this trough is for service conductors) second since a male PVC adapter is not listed to be used with the hub, I would install a close nipple, then a female PVC adapter to make compliant? Just want to be sure and make it look professional

If i were to install a male PVC adapter and flat sealing washer to ensure it to be raintight there would be fewer moving parts to the install.

 

[Dsg319]

I want it to look professional. If i were to install a myers hub, first I would need to install a bonding bushing on the inside of the trough,( because this trough is for service conductors) second since a male PVC adapter is not listed to be used with the hub, I would install a close nipple, then a female PVC adapter to make compliant? Just want to be sure and make it look professional

If i were to install a male PVC adapter and flat sealing washer to ensure it to be raintight there would be fewer moving parts to the install.

I would go with the latter. Seems simpler and cheaper.

 

[Choice_Gorilla]

Local POCO requires a rigid nipple into the meyers hub with a pvc FA on it to transition to a PVC mast.

 

[electrofelon]

A Carlon flat sealing washer used with a male adapter.

Note those are, strangely, only available up to 2". Apparently the only fully code compliant method above 2" is the RGS nipple and female adapter.

 

[kwired]

A Carlon flat sealing washer used with a male adapter.

Interesting thing in the linked document. In upper right corner it says UL listed except where noted by (an arrow symbol). Every one of the washers has the arrow symbol next to them.

 

[kwired]

We used sealing locknuts all the time in a dairy plant and they were pretty effective. A place where things can get washed down multiple times a day. Though they are only listed for use with RMC/IMC.