Sun StorEdge L8500 2N Redundant Three Phase Delta Power Supply. Supplies 220 VAC power to redundant 220 VAC load sharing power supplies for tape drives, robots, or front frame components. Required when purchasing the 2nd and 4th opitional 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.