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Old 05-24-2009, 08:25 PM   #1
zpm
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PVC conduit into metal box


What's the proper way to connect PVC conduit to a metal box. Male adapter with locknut?

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Old 05-24-2009, 08:56 PM   #2
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PVC conduit into metal box


I don't know how many thousands of MAs and locknuts I've used over the years. The locknut can be either plastic or metal.

It's very common around here to use PVC with metal boxes in block walls. I usually put the MAs into the boxes beforehand, and cut and glue the PVC to fit.

Rob

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Old 05-25-2009, 12:17 AM   #3
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PVC conduit into metal box


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Originally Posted by zpm View Post
What's the proper way to connect PVC conduit to a metal box. Male adapter with locknut?

Is this a trick question?

I don't know any other logical way.



I guess you could use a female adapter and a chase nipple.....but I don't know why you would.

A rigid compression connector would work too....but again, I don't know why you would use it.
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Old 05-25-2009, 12:58 PM   #4
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PVC conduit into metal box


A male or female (terminal) adapter with the appropriate lock ring or chase nipple works just fine.

You can also use a box adapter connected to a coupling:

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Old 05-25-2009, 01:17 PM   #5
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PVC conduit into metal box


Don't forget you need an EGC, regardless how you connect the PVC to the metal box.
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Old 05-25-2009, 02:14 PM   #6
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PVC conduit into metal box


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Originally Posted by 220/221 View Post
Is this a trick question?
Yeah. And you bit on it.


Quote:
I guess you could use a female adapter and a chase nipple.....but I don't know why you would.
Considered that, but if the box ever needed to be replaced it would require cutting up the conduit.

Quote:
A rigid compression connector would work too....but again, I don't know why you would use it.
Probably not listed for that use.

I mainly wasn't sure if I had to use plastic locknuts, but I guess it doesn't matter.

Thanks.
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Old 05-25-2009, 04:37 PM   #7
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PVC conduit into metal box


Any type of locknut will work. There's no code that requires plastic locknuts with PVC.

Rob
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Old 05-26-2009, 12:36 AM   #8
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PVC conduit into metal box


I didn't even know they made plastic locknuts . Your not talking about plastic bushings are you

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