[Amps] 220V wiring logistics

[Gary Smith]

Hi,

OK, I'm ready to run the Titan 425 cept for one small detail; line 
power.

I've got no "good" way to run 220 to the shack as I'm not permitted 
to drill holes to run line but what I do have available are outlets 
on different sides of the 220 coming into the house.

Are there any good arguments why I shouldn't tap off of the hot side 
of two separate line sources which gives me confirmed 220 and use the 
ground common to each outlet for the line ground wire which both are 
connected to the block? The breakers for each leg are 15 amps, the 
wiring is for 20A at 110V. I'll be running legal limit so there's no 
excess draw as a heating problem for the wires.

Thanks,

Gary
ka1j