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Cable management for rack-mounted systems
nd
technology brief, 2 edition
Abstract.............................................................................................................................................. 2
Introduction......................................................................................................................................... 2
Cable routing guidelines..............................................................................................
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Abstract High-density server installations involve an increasing amount of power and data cables within each rack. Mismanagement of cable assemblies can lead to poor system performance, difficult maintenance, unnecessary downtime, and even safety hazards. This paper describes proper methods and recommended techniques and products for safe and effective cable management. Introduction The trend in high performance computing (HPC) data centers is to implement high-density systems that make
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Cable routing guidelines To minimize maintenance, safety, and performance issues, routing of power and data cables should be in accordance with the following guidelines. Separation of power and data cables Cables in close proximity to each other, especially those oriented in parallel or in loops, can create electromagnetic interference (EMI) through induction. EMI can result in erratic or error-prone data transfers. To minimize the effects of EMI, power cables should be segregated from
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Securing power cables and connectors Power cables and connectors should receive extra care during installation, since loose cables or connectors can result in loss of power and unscheduled downtime. A loose power connector can create high contact resistance that can result in arcing and a fire hazard. HP power distribution products are often supplied with cable retaining clips or clamps (Figure 2), and HP strongly advises using these accessories when they are provided. For securing powe
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• Use cable routing accessories designed to maintain and secure cable. • Leave enough slack in cables for operation of articulated arms and rail slides. Since actual conductor size and type vary among types of cables, the bend radius rule can differ among cable types. For example, Table 1 lists the minimum bend radius for HP fiber optic cables and HP InfiniBand cables. Table 1. Bend radius for HP cables Cable type Minimum bend radius (R, R1, or R2) HP LC-Type fiber optic R = 0.8in (~2c
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• Do not allow other cables or components to exert tension on fiber optic cables, which can be easily crushed or damaged. • Avoid routing fiber optic cable around chassis and cabinet corners. If this is unavoidable, protect the cable. Routing network cable Network interconnects can involve a large amount of cabling due to the component/data path redundancy required to meet high availability goals. Network devices also require high serviceability, so cabling must be arranged to allow eas
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Table 2. HP cabling solutions Product HP part number Description Cable Management This kit contains 10 D-rings that mount in the back rails D-ring Kit of the rack and allow for cables to be routed and organized within the rack. 168233-B21 Network Cable This kit provides an easy way to organize and route Management Kit cables within HP racks. Cable clips, cable rings, and 1U and 2U access panels are included. AF099A Hook and Loop Adjustable, reusable strap with metal clip that
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For more information For additional information about racks, rack options, and accessories, refer to the HP Infrastructure Products page at http://h18004.www1.hp.com/products/servers/platforms/rackandpower.html. To learn more about HP Factory Express, contact your HP sales representative or visit our website at www.hp.com/go/factory-express. Call to action Send comments about this paper to TechCom@HP.com. © 2007 Hewlett-Packard Development Company, L.P. The information contained here
