On Sep 30, 1:21*am, Charles U Farley wrote:
stryped wrote :

I also bought one of those wet location boxes with the two ears to
mount on top of the metal as everyone here said. My plan is to run pvc
conduit to the openign in the back of the fixture. Do I have to use a
screw in fitting into the threaded portion of the back of this outside
box? The reason I ask is I intend to drill a hole through the metal as
close to the outside diamter of the conduit as I can. If I have a
threaded fitting, wont that outside diameter be different that the pvc
pipe attached to it. it is hard to explain but I hope you understand.

The outside of the fitting (terminal adaptor) will be bigger than the
conduit.
My local code doesn't allow plastic male threads into a threaded box hub.
We have to use a steel close nipple then a female thread adapter glued on
the PVC conduit. *The reason being the male threads are fairly weak and
tend to snap off if the assembly is stressed. Your local accepted practice
may vary.

I went to Lowes and could find no threases "nipple" in pvc, just a
"male fitting".

Got to thinking, the metal siding is not that thick. Can I drill a
hole in the metal the size of just the 1/2 inch threaded portion.
(would that be 7/8 inch or so diameter?) and place the larger diameter
"nut" side inside the building with just the threads going through,
then screw the threads into the back of the aluminum box? Then of
course a very short piece of pvc conduit into the back of the male
fitting? Siliconing the threads and everythign?