The NEC has no maximum length that NM cable can enter a panelboard. The closest thing you might find is Electrical equipment shall be installed in a neat and workmanlike manner which is, IMO unenforceable.
The NEC has no maximum length that NM cable can enter a panelboard. The closest thing you might find is Electrical equipment shall be installed in a neat and workmanlike manner which is, IMO unenforceable.