1/2 (half) Inch and 3/4 (three quarter) Inch Threaded Electrical Junction Box Plugs

prusaprinters

<p>This is a threaded plug (cap) for electrical junction boxes. There are both 1/2-inch and 3/4-inch versions as well as versions that include a hex thumb screw for easy tightening/loosening (which I highly recommend--who wants to carry around a huge flat-head screwdriver just for plugs?).</p> <p><strong>Note:</strong> I highly recommend using some dielectric grease on the threads to ensure water can't get into your electrical box.</p> <p>Remember: In order to comply with the National Electrical Code (NEC) you'll have to print this in a flame-retardant filament and protect it from UV rays somehow (either by using UV-stable filament or painting with a UV-protective coating).</p> <h3>Print instructions</h3><p>Print flat (no rotation) with 3 perimeters and it should work out fine. The threads are slightly under-sized to make for an easy fit. If you find the plugs are still too tight just adjust the "diameter" value down a bit in the included .scad file (say, -0.005 or -0.01).</p>