subfloor EMT connection to external box

[grantw]

I'm trying to figure the best way to prepare for this. I have 3/4 EMT ran from my garage through the sub floor / crawlspace and will be poking it out of the wall near the rear of the house in prep for installing a shed later. The walls are still being constructed, so I wanted to get the conduit in before siding goes up. Right now I have ~12 inches of stub sticking out the side.

What I'm getting at, Is there a preferred way of terminating this EMT on the OUTSIDE of the wall after the siding goes up? I'm trying to keep it nice and clean for a future trench. I'd like to install a small breaker / cutoff box before going underground to a future shed.

The house is under construction now, and this conduit run to the shed is on me, not included in the electrician's bid. for now it's empty conduit until I'm ready to pull wire for a shed.

 

[zmaxmotorsports]

I'm trying to figure the best way to prepare for this. I have 3/4 EMT ran from my garage through the sub floor / crawlspace and will be poking it out of the wall near the rear of the house in prep for installing a shed later. The walls are still being constructed, so I wanted to get the conduit in before siding goes up. Right now I have ~12 inches of stub sticking out the side.

What I'm getting at, Is there a preferred way of terminating this EMT on the OUTSIDE of the wall after the siding goes up? I'm trying to keep it nice and clean for a future trench. I'd like to install a small breaker / cutoff box before going underground to a future shed.

The house is under construction now, and this conduit run to the shed is on me, not included in the electrician's bid. for now it's empty conduit until I'm ready to pull wire for a shed.

Junction box with a cover ,or a cap.

 

[grantw]

My main concern is weather proofing the external EMT. Any best practicies or standards on how to keep the EMT / box connection water tight?

 

[Zeke]

My main concern is weather proofing the external EMT. Any best practicies or standards on how to keep the EMT / box connection water tight?

Waterproof EMT connectors. Even HD has those.

 

[grantw]

Sure, and I'm trying to keep it looking neat.

So If I could run the EMT in to the back of a small breaker box like a spa panel, then run pvc straight down underground... How do i get the emt in to the back of the breaker box if I'm trying to flush mount?

best image I can find is something like this: http://www.crodog.org/solar/acbox.jpg

I'd like to use the raintight / liquid tight compression fitting, but I'm unsure how to get the box to flush mount to the wall if I do...

 

[Zeke]

The gland nut that you see inside the box is the same one at the left side of my pic. Just bring the water tight fitting to where the back of the box will be and cinch it up. Place the box knock-out up to the threads and secure.

The way you are flush mounting makes me think there is no need for WT fittings. Just flash the box before siding. Getting the PVC down neatly is another issue. It's either behind the siding or dropping down out of a SURFACE mounted box.

 

[grantw]

I'm planning on dropping down out of the box. I can't keep in in the wall due to a hefty foundation wall.

 

[Zeke]

Well, I can't see how with a flush mounted box. But the back of the surface mounted box would be relatively dry especially if you put some metal flashing on top. But to be sure about ii, use the WT fitting on the backside. It will be blind, but if any water wicks around there, it won't be the fitting that lets water into the box.

 

[grantw]

Well, I can't see how with a flush mounted box. But the back of the surface mounted box would be relatively dry especially if you put some metal flashing on top. But to be sure about ii, use the WT fitting on the backside. It will be blind, but if any water wicks around there, it won't be the fitting that lets water into the box.

Yeah, i probably meant surface mount in my previous posts,... sorry about that... I was thinking I want the back of the box to be flush with the siding. Yes, confusing, sorry. I'll leave the stub poking out until the electrician comes around, and I'll see if I can ask him how he would mount a breaker / disconnect cleanly. Time is not an issue yet, just trying to plan for materials.

I do like the idea of flashing the box to keep the water out from behind it.

 

[ard]

Id do it in PVC then glue a fitting on so it will allow a surface mount. The thickened part of the fitting can be accommodated by drilling a slightly bigger hole for the first 1.5 inches

 

[zmaxmotorsports]

Sure, and I'm trying to keep it looking neat.

So If I could run the EMT in to the back of a small breaker box like a spa panel, then run pvc straight down underground... How do i get the emt in to the back of the breaker box if I'm trying to flush mount?

best image I can find is something like this: http://www.crodog.org/solar/acbox.jpg

I'd like to use the raintight / liquid tight compression fitting, but I'm unsure how to get the box to flush mount to the wall if I do...

Just make an oversized hole in the wall behind the box.

 

[LXCam]

Install a threaded coupling to a connector. Stub the coupling flush with what will become the finished wall. Then you can either thread a chase nipply thru your box/panel into the coupling or if you change your mind thread a close ****** into it and a LB and go up or down with conduit. Also where the coupling finishes out flush caulk it so that that is sealed.

 

[grantw]

Install a threaded coupling to a connector. Stub the coupling flush with what will become the finished wall. Then you can either thread a chase nipply thru your box/panel into the coupling or if you change your mind thread a close ****** into it and a LB and go up or down with conduit. Also where the coupling finishes out flush caulk it so that that is sealed.

I like this idea, a lot. I'm going to try this one once the rest of that wall's blocking is done. Thanks for the help guys!