so could you simply go from generator---hook up to outside power box---then run #10/3 wire to a 6 breaker sub panel---splitting the 10 wire inside the sub panel (one hot wire to each leg-neutral to buss bar and ground to separate buss bar) thus creating 6 or so separate circuits with there own breakers at 120v each and then running outlets to strategic locations in the house similar to the way a house is wired but this system would be for generator use only never touching the existing panel wiring? would this not be like running extension cords?
Here is the code section that governs generatros that has receptacles mounted on the frame of the generator. Pay close attention to the Note at the bottom
250.34 Portable and Vehicle-Mounted Generators.
(A) Portable Generators. The frame of a portable generator shall not be required to be connected to a grounding electrode as defined in 250.52 for a system supplied by the generator under the following conditions:
(1) The generator supplies only equipment mounted on the generator, cord-and-plug-connected equipment through receptacles mounted on the generator, or both, and
(2) The normally non–current-carrying metal parts of equipment and the equipment grounding conductor terminals of the receptacles are connected to the generator frame.
(B) Vehicle-Mounted Generators. The frame of a vehicle shall not be required to be connected to a grounding electrode as defined in 250.52 for a system supplied by a generator located on this vehicle under the following conditions:
(1) The frame of the generator is bonded to the vehicle frame, and
(2) The generator supplies only equipment located on the vehicle or cord-and-plug-connected equipment through receptacles mounted on the vehicle, or both equipment located on the vehicle and cord-and-plug-connected equipment through receptacles mounted on the vehicle or on the generator, and
(3) The normally non–current-carrying metal parts of equipment and the equipment grounding conductor terminals of the receptacles are connected to the generator frame.
(C) Grounded Conductor Bonding. A system conductor that is required to be grounded by 250.26 shall be connected to the generator frame where the generator is a component of a separately derived system.
Informational Note: For grounding portable generators supplying fixed wiring systems, see 250.30.