Other catalogs such as Crouse-Hinds, Square D, Appleton, Killark, Houston Wire and Cable, Annixter Wire and Cable, Bussmann, Belden wire and cable, Hubbell, just to name a few good ones to have on hand. Your local Graybar supplier should have a catalog, as does Grainger. Many of these catalogs will give dimensions of boxes, panel cans, etc. for your planning installations. We, in the design end of this business, depend on catalogs information all the time to do necessary details for the installation contractors. Most of these same catalogs are out here on the internet, with email contacts if you need additional information.
Hope this helps.
