Installation Guidelines for Telecommunications Cable
The minimum horizontal cable bend radius, under no-load conditions, shall be four times the diameter of the Category 6A cable. The minimum inside bend radius, under no load conditions, for 4-pair UTP patch cable shall be .25 inches.
The maximum tensile loading shall not exceed 25 pounds on the Category 6A cable.
Cable ties shall not be installed as to place a strain or compression on the cable jacket.
Cables that serve several adjacent rooms shall be grouped together into bundles. Bundles sizes of no more than 24 cables or left loose at the bottom of the tray are preferred. It is preferred that the cables be grouped in a way that reduces the quantity of bundles.
Cables in service areas such as attics, crawl spaces, mechanical chases, and above lay in ceilings shall be held in place with metal J-hooks or cable tray. The J-hooks shall keep cables neatly bundled and shall be located to reduce interference with future maintenance and construction projects. Cables shall be mounted at least 1' above drop tile ceilings, shall never lie on the ceiling, and shall always be supported every 4 feet.
In areas where the installation of hooks is impossible, a discussion with an UIT Communication Wiring representative should be initiated. The cables may be bundled with Velcro spaced no more than four feet apart, so long as the Velcro is tight enough to neatly bundle the cables together, but loose enough to permit the pulling of individual cables within the bundle.
Electrical or other tape, used for bundling cables during installation, shall be removed once the cables are in place, to allow the slack in individual cables to be more easily removed. Duct tape should not be used for this purpose.
Pull string shall be left in conduits, cable trays and cable hooks, after initial cable installation, to allow for future cabling needs. Pull string shall be left in places that will be difficult to access in the future.
Cables that are part of a bundle shall be of uniform length. Uniform cable length is achieved by pulling on individual cables in a bundle after the bundle has been placed in the hooks or raceway and before the cables are terminated.
Cable bundles shall hang with minimal tension between the hooks. Check cable bundles to verify that individual cables do not have excessive tension or are supporting the weight of several other cables.
At vertical to horizontal transitions, cable bundles shall have a uniform loop containing three feet of recoverable slack. Additional hooks may be required to support this slack.
Long open vertical runs shall require intermediate support. These shall support the weight of the cable between horizontal transitions. One foot of slack shall be left at each strain relief hook to insure proper loading of the hooks. Vertically mounted cable tray is preferred for long vertical runs.
Four inches of service slack shall be left at each outlet box.
Cat 6A cable will have enough slack to reach anywhere in the TR. This slack will be looped around in the tray in the TR. In each wall box 4” of slack will be left in each wall jack. Fiber optic cables will have enough slack to reach anywhere in the TR and this slack will be left in the cable tray in the TR or mounted on a backboard.
Slack or extra cable not mentioned in this section is unacceptable and shall be eliminated prior to termination.
Patch cables will be impeccably dressed in wire managers from the patch panel insert to network switch. The upper one-half of a patch panel will have patch cables go directly up to the horizontal wire manager, then right or left to the vertical wire manager, then up or down to the network switch. The lower one-half of the patch panel will have patch cables go directly down to the horizontal wire manager, then right or left to the vertical wire manager, then up or down to the network switch.