Sun StorEdge L8500 2N Redundant Three Phase WYE Power Supply. Redundant AC power grid supplies 220 VAC power to redundant 220VAC load sharing power supplies for the tape drives, robots, or front frame components. Required when purchasing the 2nd and 4th optional 19" racks (SG-XL8500-2RAC and SG-XL8500-4RAC). Note: Installation is included but Customer will need to ensure proper electrical supply is available to the L8500 base unit. RoHS-5.