So you do have a noise issue? Is that correct, noise issues that you can hear? Usually ground loops and routing. I've heard some NOISY systems behind lazy cable routing. A wall wart won't make noise go away when it's a routing issue. Though I've seen a LOT of folks try.. LOL
We never had lightning strikes closer than 50 miles from my home, either until a month ago and lightning stuck a house two block away. Lightning strikes on the mountain, not uncommon. That same round caused some serious brown outs, black outs, and then surges, coming back on line.
It’s your equipment, me, it’s safety first, I protect equipment by maintaining the voltage, 120 on the button. I’ve never had a SQ issue, noise issue, or loosing expensive equipment because a LACK of protection. I just don’t do it. There is NO reason to lose anything..
I’m a mechanic, I stay out of trouble, NOT get out of trouble...
You keep saying "in phase" do you mean on the same rail at the main, your loosing me here. ALL on the same 120 vac rail? There are two 120s and 240 vac between the two. 240 vac single phase.
Regards