First off, I claim NOT to be any code *guru*...but if I may be of any help:
AA130FIREMAN wrote:Copper or aluminum wire with nolox?
Been doing this work for many years, in my opinion," aluminum wire is only as good as the hands
that install it"...do it right and it's as good as copper...do it wrong, well, I think you know.
AA130FIREMAN wrote:in conduit or direct bury?
This would be a personal choice. The good and bad are obvious.
AA130FIREMAN wrote:3 or 4 wire and ground rod at gen-set?
3 wire plus a ground rod bonded to neutral at gen-set.
AA130FIREMAN wrote:do I need it in conduit in the floor joists ?
No, if cable is rated for open/exposed AND is properly protected w/ over current protection.
AA130FIREMAN wrote:How deep to bury it ?
24" to top of cable/conduit. Actual code may be less (18")...but deeper is better...up to you.
AA130FIREMAN wrote:Do I go with 6 gauge ,or for the long run will 4 be better? 50 amp
How slim do you want your margin of error? Did you opt for conduit or the direct burial?...See where I'm heading here? Better to do it the last way first.