[Amps] AC wiring

[Paul Christensen]

>I just obtained a 2nd Alpha and thought about using the same 10AWG run for
> both.  Then the fog in my brain cleared and I decided to pull another
> circuit for it.

I use two Alphas on one circuit run.  But, I have to plug & unplug depending 
on which amp I'm using.  Here's a question for the NEC experts out there. 
Since I only use one amplifier at a time, can I parallel the existing socket 
in the shack to another one located next to it?  My gut is telling me that 
if two 20-A sockets are hot and active that NEC will require that each 
socket have the capacity to simultaneously supply 20-A from each socket --  
which will force me to make another home run of cabling back to the load 
center...

Which brings me to a second question.  Under NEC, can the two home runs of 
cabling be paralleled at the load center instead of the shack onto one 
breaker as long as the breaker is sized for the capacity of just one home 
run?  Or, does NEC specify two completely different paths, including 
sockets, cable runs AND breakers back at the panel?

Paul, W9AC