5 S1s will pull almost 2000 watts. A residential 115V 15A circuit will only handle about 1400 watts. Even a 20A circuit will only run 1900 watts.
If you want to run all 5 on the same circuit, you should consider having a 220V 20A circuit installed which will make the PSUs run more efficiently or you can spread the units across multiple circuits in your house
I would definetly do as Bbeesley suggests. I ran 2 20A Dedicated outlets into my office for the mining pool I have as I had the same problem with 2 miners & 3 PCs in my office.
It took the electrician ~2h to run the line from the 1st Story Panel box to 2nd Story and i had to buy ~$80 worth of supplies. All in it cost about $300 to get the outlets in and help prevent a fire
Wow american houses are wired cheap. Uk standards is 240v at 13a most houses have atleast 4 circuits downstairs sockets. Upstairs sockets. Downstairs lights. Upstairs lights.
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Wiring all depends. You can get more volts, but most don't do it. Most devices here don't require it. But sadly us miners use more watts then average person. The good thing though is cheap electricity prices depending on where you live .09-.1 kwh here.