I look at the standard American 115VAC 15A circuit and laugh. Not because I'm always maxing them out, but because when I do exceed their limits, I REALLY exceed those limits.
Fragwell Lab, I just discovered last night, has a dedicated 20A circuit on Fragwell Manor's 100A load center. I had thought I would need to upgrade the load center to be able to handle a stronger circuit for the lab, but after doing the math, no. Even with everything running, including the electric dryer, we're still not touching half of capacity. So the logical thing, then, is to run a bigger line to the lab.
I'd like to have the ability to run an EV charger one day if the opportunity arises, but that would be a pretty big load itself so I need to think big. A 230VAC circuit with a 30A rating it basically the minimum for me. I'm looking more toward 50A. That's like 11KW at full load. I'll certainly be running my own load center in the lab to break that out.
The loads:
Climate control:
15A 1 phase dedicated circuit
This will be for the A/C unit and, in the event the computers aren't providing enough heat during the winter, a ceramic heater. The cooler will be using the whole circuit when in cool mode. I doubt the heater will be needed.
Legacy Supercomputer:
20A 2-phase dedicated circuit
Legacy is my planned eight-node render farm. The systems I have in mind don't come close to maxing even one phase line, but that's only with eight nodes. I could scale up or use systems that use a lot more energy at some point. The average stripped system will draw around 2A at full load. That's including the loss from the power supply, a basic video card, full memory slots, high speed LAN card and a hard drive. I mentioned heat output previously. You can see why I don't think the heater will ever turn on.
Legacy front-end:
15A 1 phase dedicated circuit
This is just where the main computer where I do my work will be set up. It won't come close to maxing the circuit.
Lights:
15A 1phase circuit
All lighting will be connected to this one.
DC rails:
20A 1 phase circuit
The DC center will be connected to this one. The plan is to have a 115VAC to 48VDC converter which will branch out to several sockets for use with DC-DC converters to drop the voltage to lower voltages such as 12VDC and 5VDC.
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