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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?
    – ThreePhaseEel
    Commented May 30, 2021 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
    Commented May 30, 2021 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?
    – ThreePhaseEel
    Commented May 31, 2021 at 2:12

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Female to male PVC connector?

enter image description here

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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
    Commented May 31, 2021 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
    Commented May 31, 2021 at 0:41
  • You might be wrong about the conduit being plastic - pictures can mislead.
    – Ecnerwal
    Commented May 31, 2021 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
    Commented May 31, 2021 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
    Commented May 31, 2021 at 4:06

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