Originally Posted by erik
Have you found a good (and cheap) source for backplates? I was going to fabricate one out of 1/4" plywood, but I'm lazier than I am cheap...
I am an electrical contractor so I get mine from my suppliers. They are not very expensive (if you ignore that they are just a flat piece of steel with 4 holes punched on the corners). You could easily make one. Metal would be more difficult to make but I would avoid wood in an electrical enclosure (not that I haven't used it on my own projects).