I'm trying to install a subpanel in my garage. The easiest way to get the wire from the main panel to the subpanel is to use a knockout on the back of the main panel and go straight through the wall to the outside of the house, and run a conduit on the exterior of the house. The conduit will be less than 10 feet in an "ugly" corner of the house where there is already lots of utility equipment and an AC condenser, so I'm not concerned with looks. I'm planning on using 1.5" rigid steel conduit. My question is, how do I connect it to the back of the main panel? I was going to buy one of these connectors:
http://www.homedepot.com/p/Halex-1-1-2-in-Rigid-Water-Tight-Conduit-Hub-16315/100118103
But I'm not sure how I can use it with that large flange on the connector. I would have to drill a large hole in the siding and maybe caulk around it when I'm done. Should I just use a threaded nipple to go through the wall and just use a locknut on the end inside the panel? The conduit will go into an LB as soon as it gets outside.
http://www.homedepot.com/p/Halex-1-1-2-in-Rigid-Water-Tight-Conduit-Hub-16315/100118103
But I'm not sure how I can use it with that large flange on the connector. I would have to drill a large hole in the siding and maybe caulk around it when I'm done. Should I just use a threaded nipple to go through the wall and just use a locknut on the end inside the panel? The conduit will go into an LB as soon as it gets outside.