unturf Redundant 20 Amp Power Circuits for GPUs & Compute at Home

GPUs drink power. A single card under load pulls hundreds of watts, a rack server with dual power supplies wants two clean feeds, & a basement full of both trips a shared 15 amp circuit before lunch. So I built a powerwall. Two independent 20 amp circuits, 12 gauge copper, spec grade receptacles, all landing behind a steel shelf that holds a permacomputer. The left side runs on circuit "white." The right side runs on circuit "black." Each side gets its own yellow cable fished all the way back to its own breaker in the panel. Nothing shared. A server with redundant power supplies keeps running when either supply loses power. Plug one supply into white & the other into black. Trip a breaker, & the surviving supply carries the whole load on the other circuit while the server keeps serving. That separation makes the redundancy, so keep each server's full draw within what one circuit can carry alone. The math stays simple. A 20 amp breaker at 120 volts carries 16 amps continuous under the…