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!
aponter4
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?
Since # 12 wire is rated for twenty amps why not do four twenty amp circuits?

I hope those hubbels are I.G.?

Be sure an pull a dedicated neutral with each hot.

I would tie all the I.G. grounds together.

One other thing, If it were me personnally I'd use four duplex outlets instead of splitting two in half. I guess I'm a little old fashion.

Zippyy - I don't know about your gear but when i read the owners manual on my stuff practically every piece recommends a dedicated circuit. This is usually for Isolation of AC noise not overload.

PS- I haven't forgotten about you Zig :^)
Since you only have two components I would use two outlets, two dedicated lines and install a parallel filtration device in the spare receptacle. Could be Quiet Lines, Blue Circle Noise Hound, Enacom, Quantum, etc. Don't forget to send the Krell power cord to Cryogenics International and get a Highwire Wirewrap. Things will work out good...
Glen - Why should it matter (isolation noise) if in the end all the power is still coming from one place. Whether you use one circuit or two, it all goes back to the breaker box where all the power is coming from? Also, if like you say, most owners manuals suggest dedicated circuits for each piece of gear, one would never have the need to use any power or line conditioners as this would be putting all the equipment back on the same circuit. Right?