I agree that where possible, a dedicated line is the starting point. Because we must share ground with the main household system, noise can still infiltrate, but it can go a long way toward isolating the system AC from the anomalies of the rest of the house.
I installed a massive iso transformer system (10kVa) which has an additional ground that ties back to the main ground. Despite that shared ground, the system is dead quiet (i’m using extremely efficient horns, so you can hear any electrical gremlins).
Apartments are a whole other challenge as @melbguyone mentioned.
I installed a massive iso transformer system (10kVa) which has an additional ground that ties back to the main ground. Despite that shared ground, the system is dead quiet (i’m using extremely efficient horns, so you can hear any electrical gremlins).
Apartments are a whole other challenge as @melbguyone mentioned.