Um, 20A receptacle(s) on a 30A branch circuit is a violation. (1999 NEC 210-21(b)(1) & (3)). The device is unprotected; no diversity factor as on 20A, multiple receptacle circuits. You should change that 30A C.B. to a 20A, like yesterday.
Re: "noisy household appliances". Unsure about this, except for a cell phone charger and the vacuum cleaner, I don't have any visible (TV) or audible (radio, stereo) indications of such.
The big stuff - clothes dryer, A/C, and range, is 2-phase, so you have no choice on those. Disposall, dishwasher, clothes washer, and furnace is all on the famous Dedicated Circuits. Basic NEC Article 210 stuff. The vast majority of the time, all that stuff is O-F-F.
Loading all audio stuff on one phase or the other is much ado 'bout nothing. The downside is that you'll load up one phase much more than the other - another NEC violation - and you possibly may end up with a voltage drop problem on that phase.
I might experiment w/ digital & analog circuits on different phases, but I wouldn't hold my breath on that.
Re: "noisy household appliances". Unsure about this, except for a cell phone charger and the vacuum cleaner, I don't have any visible (TV) or audible (radio, stereo) indications of such.
The big stuff - clothes dryer, A/C, and range, is 2-phase, so you have no choice on those. Disposall, dishwasher, clothes washer, and furnace is all on the famous Dedicated Circuits. Basic NEC Article 210 stuff. The vast majority of the time, all that stuff is O-F-F.
Loading all audio stuff on one phase or the other is much ado 'bout nothing. The downside is that you'll load up one phase much more than the other - another NEC violation - and you possibly may end up with a voltage drop problem on that phase.
I might experiment w/ digital & analog circuits on different phases, but I wouldn't hold my breath on that.