I have a 4 switch power box from siemans it has 4x 15 amp circuits.
run in an 8 gauge 50 amp 120volt line and you can run 4x 15 amp circuits off it.
please check your local usa power codes.
I also have an 8-port gigabit greennet switch.
You can add on 4 antminer s-2's one to each 15 amp circuit . photos of the power breakout are here.
the load center runs around 20 new the circuit breaks are about 16 so 36 new.. the trendnet switch is about
the circuit center is very close to this model
http://www.amazon.com/Siemens-E0408ML1125FU-Flush-Circuit-Center/dp/B000VYOVGO/ref=sr_1_1?ie=UTF8&qid=1402505817&sr=8-1&keywords=siemans++4+space+circuit+centerhere is the circuit breaker
http://www.amazon.com/Siemens-Q115-120-Volt-Circuit-Breaker/dp/B000H5T2XE/ref=pd_bxgy_hi_img_yso this is about 37 or 38 at amazon.
the switch is here
http://www.amazon.com/TRENDnet-Unmanaged-Gigabit-GREENnet-TEG-S80g/dp/B001QUA6RA/ref=sr_1_1?ie=UTF8&qid=1402505962&sr=8-1&keywords=trendnet+teg-s80g32 usd.
lastly an extender is here
http://www.amazon.com/TP-LINK-TL-PA2010-Powerline-Adapter-200Mbps/dp/B00CUD1KEU/ref=sr_1_2?ie=UTF8&qid=1402506070&sr=8-2&keywords=tp-link+av200 about 20 usd note not a full kit you need have the starter kit to use this.
but all 3 items would allow you to increase your hash in a second spot.
at amazon the total would be 90 usd I will package all 3 and ship to the usa (no Alaska or Hawaii lower 48 states)
for .1 btc or 6 LTC free shipping . that is about 65 usd. ask questions about any of the 3 items but I prefer a combo.
photos of all three note two are sealed the circuit box was never mounted so I will call it NOS
inside shot of the circuit box.