Hole size for 2" PVC conduit

[cajun1951]

I am adding service to my metal siding workshop. I will be using 2", sched. 40, Grey PVC between the new meter socket and the main panel. It will run directly out the back of the meter socket, through the wall and direct into the main panel. They are located back to back. My understanding for cutting holes for PVC conduit is the standard is to add 3/8" to the pvc size, 1/2=7/8, 3/4=1 1/8, etc. I have read in some places that once you get to 2" that you add 1/2" instead of 3/8". Where my confusion is is that everywhere I've looked it only gives the hole size for 2" EMT as 2 1/2" and doesn't say anything about 2" PVC so I don't know if the same size applies or if it's different. The OD of 2" PVC conduit is 2 3/8". So, my question is, for 2" PVC ​conduit, what is the standard hole saw size to use? I am trying to get a really good fit through the siding to help reduce any chance of rainwater leaks.

 

[controlled]

Careful about going back to back. unless the wall is very thick there may not be enough room for 2 TA's back to back

 

[TommyO]

I am adding service to my metal siding workshop. I will be using 2", sched. 40, Grey PVC between the new meter socket and the main panel. It will run directly out the back of the meter socket, through the wall and direct into the main panel. They are located back to back. My understanding for cutting holes for PVC conduit is the standard is to add 3/8" to the pvc size, 1/2=7/8, 3/4=1 1/8, etc. I have read in some places that once you get to 2" that you add 1/2" instead of 3/8". Where my confusion is is that everywhere I've looked it only gives the hole size for 2" EMT as 2 1/2" and doesn't say anything about 2" PVC so I don't know if the same size applies or if it's different. The OD of 2" PVC conduit is 2 3/8". So, my question is, for 2" PVC ​conduit, what is the standard hole saw size to use? I am trying to get a really good fit through the siding to help reduce any chance of rainwater leaks.

Sched 40 PVC is 2.375" OD http://www.harvel.com/piping-systems/harvel-pvc-pipe/schedule-40-80/dimensions (among others)

Getting that through a hole that's exactly 2.375"? Maybe doable with sheetmetal that you're going thorugh.
But I'd plan on having a file handy. As well as caulk to seal things up.

BTW - if you're going through the back of the panels and they are back-to-back, is it going to be just the conduit that is penetrating the wall? Or is it going to be the fitting too?
I'm assuming the meter is surface mount? Going to have enough room for fitting before getting to the wall? And enough room for the fitting on the back side of the panel?

 

[K8MHZ]

Careful about going back to back. unless the wall is very thick there may not be enough room for 2 TA's back to back

This is good advice. We have had to oversize holes so the adapters would fit.

 

[tkb]

Sounds like a dyi thread to me.

 

[peter d]

Sounds like a dyi thread to me.

Yes, no professional would ask questions like this.

 

[augie47]

Question answered.
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