Quote from: Helios45 on October 23, 2021, 05:04:38 AM

So I'm planning for a small farm setup to accommodate 25 S19J Pro 100T in the beginning with room to expand up to 50 units in the near future
As per Bitmain, each unit draws about 3000w at 200~240v and the power supply has two inputs.
A 20amp circuit at 240v can handle up to 3,840w at 80% load
A 30amp circuit at 240v can handle up to 5,760w at 80% load
Considering this, is it safe to use 20 amp circuits for each antminer instead of going for 30 amp ? Thanks all

No if you get extended sag in volts.

3400-3600 watts is max an s19 should pull

210 x 20 x .80 = 3360 watts which is on the line of okay.

Maybe you will never see an issue but it could be borderline on a hot summer day.

Been there done that but out sag is lower than 210 volts we sometimes go to 190 volts.

We have all gear on 30 amps due to this issue.

So if you want to go cheap and do 20amp wire and breakers it is likely okay but may not be.