I have a 4000 watt generator with a 120 volt 30 amp TT-30 R receptacle.

Can I run 120 from my gen to my panel through a single pole 30 amp breaker to just power half of my box.

I would use a TT 30 p / L5 r cord running to an L5 30 P inlet box at the house and 10/2 wire to the single pole 30 amp breaker.

An interlock switch would be used to ensure the main would be off when the gen breaker is on. All my necessary circuits are on the powered side.

Is this possible and more importantly is it safe?

Edit: Thanks so much for the response. I have re-arranged all the important circuits to the appropriate side. Instead of using the standard dual pole 30 amp breaker for the interlock I want to use the single pole for the 10/2 wire. I am assuming the interlock will work with a single pole with out issue. The panel is a 200 amp Square D Qo and there are no MWBC. This is just for occasional emergency power so very few circuits will ever be needed. Never going to use 240. I was able to run everything I needed during our last outage with a 2000 watt gen and some extension cords.