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I'm replacing an exterior light fixture with an outlet to use to power string lights on a patio. The issue I'm facing is the exterior junction box I obtained can't screw onto the conduit as it's mostly recessed into the wall, and there's a lip that interferes with the rest of it. I was planning on attaching the box to a mounting block to even out the lip (PVC trim or whatever I can get that matches the flashing), but I don't know how to 'extend' the threaded connection so it can connect to the junction box. Is there some magic part I should look for in the store, or should I get a different type of box to mount?

box to install conduit exposed

Other code stuff if concerned: I've swapped out the standard breaker for a GFCI one (can't use a GFCI outlet 8' in the air).

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  • Is enlarging the hole in the cladding to gain a bit of space for a fitting an option? May 30 at 23:33
  • Possibly, what sort of fitting? I'm kinda conservative when it comes to putting holes in the exterior, but the light fixture that was there was already super sketchy
    – Nick T
    May 30 at 23:55
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    Some sort of threaded coupling so that you can get a nipple from that to the hub, basically. Also, the conduit's metal, right? May 31 at 2:12
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Female to male PVC connector?

enter image description here

source

Maybe this? Thread wires thru, screw female part onto what you have coming out of the wall and there is your protruding threaded male part with wires protruding. I invariably get the wrong one first time so bring your new box to the hardware store to make sure it will attach.

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  • To keep a ground connection, would I need to fish a new wire back to the switch box?
    – Nick T
    May 31 at 0:34
  • There is no ground wire in your picture and the condulet shown is plastic so if code requires a ground you will need to do just that.
    – Gil
    May 31 at 0:41
  • You might be wrong about the conduit being plastic - pictures can mislead.
    – Ecnerwal
    May 31 at 0:48
  • Yeah to me that looks like it could be zinc alloy. A rigid coupling and nipple achieve similar effect in metal. Make sure they're of a metal suitable for outdoor use.
    – K H
    May 31 at 1:51
  • It's a metal conduit (I'm in Chicago, required everywhere), seems like the conduit is rigidly attached to the threads somehow
    – Nick T
    May 31 at 4:06

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