I have a 5000/6250 120/240 v gen.The 240 is rated for 20 amps.I have a 30 amp. outdoor receptacle 240 v.The receptacle on the gen. is a 20 amp. receptacle.I have a 20amp/30 amp plug to fit the 30 amp on the #10 wire 3 wire + ground extension cord and into the 20 amp. gen. receptacle.This should carry 10 amps. on each A & B phase.The 120 v duplex receptacle on the gen is split to deliver 20 amps. on the top + 20 amps on the bottom of the receptacle.The gen. is rated at 41.7 amps 120v.Could I wire 2 120 pigtails ,1 from each half of the receptacle (180 deg. out of phase from each other) then run 1 phase 120 to 1 phase on the 240 and the other phase 120 to the other phase of the 240 extension end to the generator?I'm thinking that this should give me 20 amps to each phase/side of house panel for power outage use for 120 v service only.Has anyone done this?