theres a really weird mix of advice in this thread, a lot of it coming from people with less than 5 antminers.
I currently run 17 antminers (and have run/sold several more on top of that). Here is my advice.
1) go with 208V power. If you are industrial you likely have 600V mains, and 208V is the most common transformer output. Its also about 3-5% more efficient than 120V.
2) use L6-30 outlets and find some PDUs (power distribution units) that match it. This gives ~4.98kW of power per outlet (after the 20% safety threshold) and is a common style that is cheap to find and install
3) get a few 48-port network switches that are 10/100 outputs. Most of these are build with a gigabit trunk so they can all daisy chain while providing plenty of good connections.
4) forget the secondary fans. Its an extra cost, wastes time to install, and is totally unnecessary in the setup you are going for.
5) you NEED the ability to ventilate the heat directly outside. a closed building requires much more air conditioning and thus even more power usage.
5b) use a hot/cold aisle design. 2 rows of shelves, exhaust from both pinted inwards, with strong fans pushing all the heat out the aforementioned ventilation to outside.
5c) you will still need a lot of AC to keep things cool, probably about 15% of the ASIC power draw if you can vent to outdoors, 30% otherwise.
6) go with DPS-2000 power supplies. These are the most effective use of space and time for getting the massive 12V amperage you will need. Alternatively, the DPS-800 can put out 1000W on a 208V input. (gigampz.com has some nice, but slightly pricy, breakout boards to make using this PSU easy)
6b) soldering fat wires to a PSU is a huge pain. either follow a method that requires minimal soldering, or invest in a proper 120W+ soldering gun that is at least $40. anything cheaper will burn up with extended use.
6c) I sell custom 16awg PCIe cables with tinned ends. They are thick wires and can handle more than enough current (beware 18awg labelled stuff from china). see my sig if you are interested in getting some - they work well if you splice a few onto thicker 10 or 12 awg wires for use with the DPS-2000.
6ci) PCIe connectors will make life easy if something needs swapping. the screw terminals are impossible to access if you stack miners or have them side by side.
7) stack the miners on thier sides,with bottoms facing the bottoms of those in the neighbouring stack. (see picture). This will allow you to pack miners in with good density and contain the airflow across the units nicely.
Yes, the SP10 is smaller and more efficient. But it costs almost twice the $/GH. If you are bullish on BTC prices rising the S1 is by far the best option. (if you feel that in 6 months from now we will still be <$500, then by all means go for the more efficient hardware). The S1 is a solid unit with nice 120mm fans, and if you have the space and power for them they are my #1 pick. You can always undervolt them (takes about 5-10 min per machine to do) to get <1.3w/GH when the time comes (about 2 months by my estimate if $/BTC doesn't jump up first)
