RMC Couplings

[ivsenroute]

Are not rain-tight. The threads are not tapered. What ye' say about that?

 

[ivsenroute]

Since they are not listed for use in wet locations, what do you do?

 

[K8MHZ]

Since they are not listed for use in wet locations, what do you do?

Use conductors that have insulation that IS listed for use in wet locations.

We aren't required to make pipe runs waterproof.

 

[ivsenroute]

Use conductors that have insulation that IS listed for use in wet locations.

We aren't required to make pipe runs waterproof.

Understood, such as UG installations that will be filled with water anyway.

But what about wet areas that are above and lead into enclosures that have switching and sensitive equipment?

 

[K8MHZ]

Understood, such as UG installations that will be filled with water anyway.

But what about wet areas that are above and lead into enclosures that have switching and sensitive equipment?

The NEC is a minimum set of standards created with safety in mind.

It is up to the designer to protect sensitive equipment while staying within the rules.

If RMC, even though allowed, doesn't provide the protection level the installation requires to protect sensitive equipment, then another type of conduit should be used, LFMC comes to mind.

 

[nhfire77]

Understood, such as UG installations that will be filled with water anyway.

But what about wet areas that are above and lead into enclosures that have switching and sensitive equipment?

Make the RMC and the enclosure/box arraigned to drain and not fed in the top. Common sense is necessary, if there is water forming or getting into the RMC and it feeds into a box from the top, that's just bad. Kinda like not using a myers hub above energized parts in a meter, just dumb.

 

[roger]

Make the RMC and the enclosure/box arraigned to drain

Which is a code requirement see 225.22

Roger

 

[nhfire77]

Which is a code requirement see 225.22

Roger

yea, you guys know those section numbers better than me...i'm posting from my iphone, I should be working, but its sooooo nice out here in new england!!

 

[iwire]

but its sooooo nice out here in new england!!

It is an awesome fall day, I have my office windows opened up and am joying the fresh air.

 

[wireguy8169]

I am not sure if it actually made them water tight but at a quarry we maintained and did new installs at in Reading PA, we used pipe dope on the threads. We did not use the conduit for an equipment ground always ran one in everypipe. I am not saying to do that or even if its code or not just the reason ing behind it was there was a good bit of moisture, grease, dust, or whatever that I suppose could work its way in through the couplers.

Hope that helps

And its a beautiful day here in Southern Maine too...