Meyers/TA pvc

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If you are quoting Smart$, then that is not what he wrote. You edited it and that is misleading.

He wrote:

Using any connector with straight threads in a threaded entry is a listing violation.
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I see what you are saying, I wouldn't do that. I always copy and paste, did he change it later???

-Hal
 
hbiss said:
I see what you are saying, I always do that. I always copy and paste, and change it later!!!

-Hal
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Really?:lol:

I'm supposed the system lets us do that. Welcome to Election News dot com :rant:
 
This is getting interesting. I knew about the pvc and the non tapered threads, we always use them in service hubs and have never been cited. But I see that the solar installers always use threaded LB's and T's with EMT compression connectors and EMT up to the roof, etc. I am wondering now about those EMT connectors and the threaded conduit bodies. Is this an apparent violation?
 
GerryB said:
This is getting interesting. I knew about the pvc and the non tapered threads, we always use them in service hubs and have never been cited. But I see that the solar installers always use threaded LB's and T's with EMT compression connectors and EMT up to the roof, etc. I am wondering now about those EMT connectors and the threaded conduit bodies. Is this an apparent violation?
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I don't see how else you could do it and everybody has been doing it forever. Consider also that they recently came out with raintight compression connectors that are required to be used. If you can't use them in a threaded hub there isn't too much use for them except for sheet metal enclosures.

-Hal
 
hbiss said:
I don't see how else you could do it and everybody has been doing it forever. Consider also that they recently came out with raintight compression connectors that are required to be used. If you can't use them in a threaded hub there isn't too much use for them except for sheet metal enclosures.

-Hal
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Don't kill the messenger. ;)
 
Carultch said:
Example please. Most cases I've seen have tapered threads on both PVC gendered adapters.
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I know you brought this up with me the other day and I have been looking for clear examples to post here.

I am not seeing NPT threads on male adapters.
 
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Smart $ said:
I can't... because it doesn't according to listings.
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I agree, yet ... real world again. :cool:

I just ran 3/4", 1.25", 1.5" and 2" EMT outdoors, each required an LB and I was provided with the combo LBs. So the RT EMT connectors screw into the LBs no problem at all, as in none so that will not seal but the RT connector has a sealing gasket so tighten that up against the conduit body and it just squeezes out. :roll: So you make the call between tight enough and too tight. But now you have the screws in the conduit body for direct EMT use. They leak too yet the LB shipped complicate with cover and gasket.

Apparently they assume when used with RMC the seal will be in further than the holes for the EMT set screws?

So while I am pondering on this I am screwing around with the RT COMP couplings and connectors we now need because the old comp fittings were not RT enough. :roll:

Now when I get this work inspected I am willing to bet the only question I am asked is if I used RT fittings.
 
hbiss said:
I don't see how else you could do it and everybody has been doing it forever. Consider also that they recently came out with raintight compression connectors that are required to be used. If you can't use them in a threaded hub there isn't too much use for them except for sheet metal enclosures.

-Hal
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For a short time after they started making us use alleged raintight fittings, I stopped using meyers hubs where entering a sheet metal enclosure with EMT. Big mistake after coming back to some of those installs and seeing the sealing washer is pushed out from the fitting or even completely gone in some instances.

Those fittings are nothing but a joke. The extra nylon ferrule fits the tubing so tight it is almost impossible to insert the tubing into the fitting without disassembling the fitting and putting it back together with the tube inserted, time consuming.

On top of that - most of the installs I encounter there will be more water from condensation inside the tubing then a standard compression fitting would ever leak, or even would leak through the joint between a straight thread fitting and a hub intended for tapered thread.

UL needs to look at the bigger picture when determining what is suitable for a raintight application. I have now gone back to using meyers hubs when entering the top of a sheet metal enclosure with a raintight EMT fitting. Side entry - may use some discretion depending on what is in the enclosure and how high the entry is on the side of the enclosure.
 
iwire said:
I agree, yet ... real world again. :cool:
...
Now when I get this work inspected I am willing to bet the only question I am asked is if I used RT fittings.
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Let me quote what you said in another thread...
iwire said:
It is worth pointing out that when an inspector [approves something that is non-compliant] it is still a violation and can come back on you at any time in the future.
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FWIW, I believe a wrench tight connector without the sealing washer forms a more raintight connection than does using the sealing washer and leaving it just loose enough to not squeeze the washer out from between the connector shoulder and the conduit body's body.
 
I was at a SH counter day today and brought up this subject. Of the 20 or so standing around, a few of the guys knew about it, then someone asked if this is something the inspectors are going to be going after everyone for, and the consensus is most don't know about it; they're just people too. It was an interesting discussion there as it is here.
 
So it sounds like the bottom line is even rain tight emt compression fittings do not have tapered threads and are not listed to screw into threaded lb's and be used outdoors as rain tight.
 
Those fittings are nothing but a joke. The extra nylon ferrule fits the tubing so tight it is almost impossible to insert the tubing into the fitting without disassembling the fitting and putting it back together with the tube inserted, time consuming.
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You have to pay extra attention to de-burring and chamfering the outside of the EMT cut end. If you do that it will slide right on.

-Hal
 
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