I don't think there is any real benefit to doing this, except wasting a little money. Basically, your running two independant circiuts back to the breaker panel just to have two 15 amp breakers. I don't think plugging any two peices of equipment into one 15 amp circuit is going to blow that breaker. What other reason would there be for doing this?
two dedicated lines into one duplex outlet
i am setting up 4 dedicated lines; two 20 amp and two 15 amp. I'll be using Hubbell 5362 outlets. Can i place individual lines into each of the receptacles? Can the ground be isolated for each line on a particular outlet or the two lines on that outlet would have to share the ground? Does it matter? Should i keep the same amperage lines on the same duplex outlet? I'll be using 10/2 and 12/2 romex for the 20-amp and 15-amp lines respectively. Thanks for your input!