Thanks all for the tips. This is for a US 15-amp plug. An IEC isn't that big but all the cables I own have an IEC sticking out of a huge cylindrical head that's the same size as the male end of the plug. Maybe 3 inches is a stretch but definitely a 2 inch hole would be needed. I do see some of the Cardas cables seem to have smaller heads on them. Looks like Pangea cables also have small heads too. I have one of those somewhere I can measure to see for sure.
Power cable with small connector / termination
I am planning to make a change to move equipment to a more accessible location on a built-in cabinet/bookshelf in my house. The electrical outlet is in the lower section behind closed cabinet doors, but I want to have equipment on top of that, in the open area of the bookcase. This requires me to drill a hole at the back of the bookcase through the top of the lower cabinet so I can pass the power cable through it. I'd like to use a quality cable but all of the ones I currently own have gigantic heads on them and I don't really want to drill a 3 inch hole through the cabinet. Does anyone know of any power cables that have slightly more reasonably sized terminations? At least at one end, as I only need to feed it through one way.