An alternative to multiple dedicated lines, and the method I used, is a single 240V line fed to a subpanel and proper use of isolation transformers/power conditioners.
Isolation or step-down transformers can be had fairly cheaply. My big 5KVA cost only $100. Transformers can be tricky and may hum under some circumstances. Mine don't, but they can in some wiring configurations. There's a learning curve involved. Partially wired for balanced AC now.
I don't want to start a discussion about power conditioners but many are built around a transformer, usually toroidal. As I said, not going there.
North American 240V is dual 120V out of phase, which can cause other issues. The galvanic isolation of my TVC prevents most of those. Granted, my system is fairly unique but with nearly 3KW of amplification, it needed to be.
Isolation or step-down transformers can be had fairly cheaply. My big 5KVA cost only $100. Transformers can be tricky and may hum under some circumstances. Mine don't, but they can in some wiring configurations. There's a learning curve involved. Partially wired for balanced AC now.
I don't want to start a discussion about power conditioners but many are built around a transformer, usually toroidal. As I said, not going there.
North American 240V is dual 120V out of phase, which can cause other issues. The galvanic isolation of my TVC prevents most of those. Granted, my system is fairly unique but with nearly 3KW of amplification, it needed to be.