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Efficient Cable Ingress/Egress and Routing for Computer Rack Cabinets Disclosure Number: IPCOM000246786D
Publication Date: 2016-Jun-30
Document File: 6 page(s) / 896K

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The Prior Art Database


Disclosed is a method of optimally routing cables in and out of rack cabinet enclosures in a very unobtrusive way, which provides more room for additional content within the rack cabinet.

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This is the abbreviated version, containing approximately 52% of the total text.

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Efficient Cable Ingress /

As the density of IT equipment increases, so does the amount of required cabling. However, while cabling volume increases, the rack width is typically fixed at a maximum of 600mm wide to match the floor tiles of most data centers. In the industry, current electronic rack/cabinet ("rack") designs are not able to keep up with this overwhelming cable increase at a fixed width constraint and, at the same time, maintain adequate structural rigidity. This, in turn, forces installers to depopulate equipment in a rack and/or add expensive extender sub-racks on the back to spread out cabling.

    Current racks are designed such that casters and levelers are normally placed to the outside front and back corners for maximum stability and structural rigidity as shown in Figure 1 below.

    However, there is a significant trade-off because these caster/leveler elements prevent cables from entering/exiting the outer sides of the rack. In this case, cables have to be maneuvered around the casters/leveler areas and routed through the center open portion of a rack as shown in Figure 2 below. This, unfortunately, requires clearance such that equipment cannot be installed directly in front of the cable bundles, which reduces the overall amount of equipment which can be installed in these types of racks. Also, without equipment at the very bottom, the


/Egress and Routing for Computer Rack Cabinets

Egress and Routing for Computer Rack Cabinets

Figure 1

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center of gravity of the entire system raises, which makes the rack system more unstable from a tip/tilt perspective. Extra measures have to then be taken (add ballast, add outriggers, depopulate upper equipment, etc.) to maintain stability.

Figure 2

Also, Figure 2 above shows how flanges/stiffening brackets, used to stiffen the side vertical walls, force cables to be routed around them instead of easily routing straight up/down. This unfortunately reduces the overall size of cable bundles to prevent them from overshadowing the equipment bays and prevent interfering with very deep pieces of installed equipment. If the cable bundles are too large, the installer would then be forced to depopulate equipment in these areas to reduce the amount of cabling or add on deep, expensive sub-rack extender elements.

    A similar situation is often true at the top of racks, where structure (side flanges, etc.) is located at the outer edges, forcing cables to route inward and reduce the amount of overall equipment that can be installed as shown in Figure 3 below.


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Figure 3

Therefore, a more efficient method of cable management (ingress, egress, and routing) is needed in order to:
1.) Allow equipment to be populated in all bays of a given rack.

2.) Allow the largest possible size of cable bundles to be routed.

3.) Maintain structural rigidity and tilt/stability of the rack.

4.) Not require the need to add a sub-rack extender assembly.

    The invention is purposefully laid out su...