In stock mode with the ASICs at 218.75, how much power does an S3 pull? The OP says 366 watts, while dogie's guide says 340. If it's 340 I should be able to run 4 S3's off of one regular 120v circuit right? 340x4 = 1360 watts. That's about 75% utilization of power... Should be within the safe zone..
Yes you can.
Most ppl put the safe zone for a continous load at 80% anyway.
It is more of a guideline than a solid limit, you should be fine.