I just changed out a 3 gang switch box in my bathroom to a single gang box with a 3 single pole switch. It works fine but wondering if I need to worry about overheating. It is a deep single gang box which just fits in the 2 x 4 wall but there are 5 wires going into this box. Do I need to get a special box that would give more room or is it fine to stay the way it is.