Speak to an electrician over randoms on the internet.
If you can afford 25 ASIC you can afford the few hundred dollars to install breakers and get the right advice.
This. Also, let professional build you mains and use 3 phase pdu's on top of that, i use these
http://www.ebay.com/itm/381781937275The APC PDUs are pretty good - although if you can, go for the 32A ones as even though they have 20+ connections, you could exceed 16A with three miners on 240/230V... On eBay the price between 32A and 16A is very little.. and with the managed ones you can power cycle individual sockets if miners hang.