Outdoor J box Help

[Flexia]

Is it code to mount a J box outside the house and drill thru the back of box into an exterior wall?

Here is where my question comes from. I am running MHF for a service to my garage. It is not aloud indoor in open air. I have a finished basement and running conduit would be a pain. I plan on mounting the J box outside the house where my conduit for the garage is coming up which is about 6in from my panel. Inside the J box I plan to junction the MHF with SER and run the SER thru the back of the J box into the house and then to my panel.

another question is do I need the run conduit into the wall from the J box or can I just run the SER in and then seal the hole into the house and j box?


Something like this but with conduit feeding into the bottom.

 

[Charles (in GA)]

I would run a short stub of conduit thru the back into the wall, and seal the box to the wall like crazy as you mount it in place, to prevent water intrusion.

Where is the jacketed SER going to be run in your finished basement?

Honestly, the exterior of the house would look better if you used an LB to make the turn from the riser into the wall, and put the junction box inside the basement.

Charles

 

[Flexia]

The ser is gonna to go into the house right under my panel. And that side of the house doesn't look good anyway. Have a cable and phone and service entrance all right there. The only time I'll see is is when I mow

 

[MTW]

To meet the code you need a cable fitting or conduit sleeve, leaving the back of that box. It's considered a wet location so that limits what you can use, no indoor only rated cable clamp connectors (two screw). The choices are rain-tite cable connector, or a conduit sleeve.

If you leave it the way it is, water will enter your drilled wall opening and your splice box, never a good idea.

If it was me, I would use a plastic conduit ****** with locknuts and plastic bushings on both ends. Install the conduit ****** and box temporarily, to check for fit up. Then remove the box and caulk around the ****** and siding entry hole. Then refasten the box over the ******, using a locknut and plastic bushing.

Caulk the top and sides of the box to shed water, but leave the bottom seam open to drain.

Another suggestion is to drill 2 small holes, less than 1/4" into the bottom for drainage and venting condensation buildup. Space the holes in opposite corners near the cover for the best drainage and cross ventilation.

After splicing the conductors, seal the conduit interior with duct seal or stuff it with a plastic bag. Caulk is not good here for servicing the installation later.

I also recommend you seal the underground conduit in a similar fashion to prevent air infiltration and the resultant condensation buildup.

MTW Ω

 

[rockwithjason]

what he said ^

 

[Mustang51js]

I would just use a 1 1/4 romex connector which ends up mostly inside the wall,then silicone around the top. Never had an issue with it, it's the same as when services are done with service cable through the back of the meter.

 

[Flexia]

Thanks guys. And the picture isn't on my house just used it for reference.

Is the SER ok for above ground in conduit?

Now where to get the pcv ******?

 

[brownie]

I would just use a 1 1/4 romex connector which ends up mostly inside the wall,then silicone around the top. Never had an issue with it, it's the same as when services are done with service cable through the back of the meter.

I would do the same.