Get a PSAudio Power supply and properly ground it, even if that mean installing your own ground system. 2 or 3 phase power isn't an issue as long as the Power supply has enough source power. Example the PS1200 will accept 2 phases of 30 amp power and by removing the internal jumper you can isolate the ground (by installing your own ground grid.) No TV signals or extreneous information will be delivered to you powered devices. I AM AN ELECTRICAL ENGINEER THAT HAS TO DEAL WITH PROCESS CONTROL NOISE IN INDUSTRIAL ENVIROMENTS.
