Requirements for third party racks with vertical PDUs (rear-facing)If using a rear-facing PDU within a third party rack, refer to the diagram below toensure that the rack and PDU combination are sufficient for the array.Figure 32 Requirements for customer rack with rear-facing, vertical PDUsCustomer Rack with rear-facing non-EMC PDU, Top ViewRackPostRear NEMAFront NEMAFront NEMA Rear NEMAFront—Front Door—RackPostRackPostRackPostpwpw CustomerPDUCustomerPDUSpace required by enclosuresengine rails, and cablemanagement armsj—Rear Door—ea b c(24” (60.96 cm) min)Min depth (k)(43” (109.2 cm) min)Rear19” NEMA(48.26 cm)d2.5” (6.35 cm) (min)fgfgh iRack depth = a+b+cDim Label Descriptiona = distance between front surface of rack post and NEMA rail.b = distance between NEMA rails.(24" (60.96 cm) recommended, up to 34" (86.36 cm) allowed.)c = distance between rear NEMA rails to exterior, rear surface of rack.d If a front door exists, = distance between inner-front surface of the front door and the front NEMArail.e = distance between rear surface of rack post to inner surface of rear door.f = distance between inside surface of rack post and 19" (48.26cm) space required by rails,enclosures, and cable management arms. Minimum of 3" (7.62cm) is recommended.Note: If no rack post, minimum recommended distance is measured to inside surface of rack.g = width of rack post.h = 19" (48.26 cm) + (2f)Min requirement = 25" (63.5 cm)i = rack width (minimum)19" (48.26 cm) + (2f) + (2g)Where:Third Party Racking Option for VMAX 450F, VMAX 850F and VMAX 950F100 Site Planning Guide VMAX 250F, VMAX 450F, VMAX 850F, VMAX 950F with HYPERMAX OS
