Bought generic Senlifang 1650W 240v power supplies on Aliexpress for $120/each to power my S9 and L3+ ASIC miners (2 of each). Power Draw is 21 amps per hot with all 4 miners running (7/7 for S9 and 3.5/3.5 for L3+) so all four can safely run on a single 30 amp L14-30R receptacle. Build a Power Distribution system using a panel/breakers. See pictures:
https://imgur.com/a/UnRJDUsed a 2 Pole Circuit Breaker Panel, 2 pole 30amp breaker, four 14awg power extensions, L14-30P, 10 gauge 4 conductor SOOW. Got all parts off Ebay and assembled. Feeds hot to both black and white wires on 14awg power extensions that plug directly into power supplies. Great for 1600W power supplies that feed AntMiner S9 and L3+
