
New provisions added to require stationary generators of 600 volts and less to be listed.
445.6 Listing (Generators)
Stationary generators 600 volts and less shall be listed.
Exception: One of a kind or custom manufactured generators shall be permitted to be field labeled by a field evaluation body.
Informational Note: For additional information, see UL 2200, Standard for Stationary Engine Generator Assemblies.

New requirements were added to require an outdoor emergency generator shutdown device for generators (other than cord-and-plug-connected generators) installed at one- and two-family dwelling units.
445.18 Disconnecting Means and Emergency Shutdown of Prime Mover.
(A) Disconnecting Means.
(B) Emergency Shutdown of Prime Mover.
(C) Remote Emergency Shutdown.
(D) Emergency Shutdown in One- and Two-Family Dwelling Units. For other than cord-and-plug-connected portable generators, an emergency shutdown device shall be located outside the dwelling unit at a readily accessible location. (C)(E) Generators Installed in Parallel.
(see NEC for complete text.)