Flexible, small-diameter 28-gauge copper patch cords can offer big advantages in commercial networks. As data center managers work to maintain and increase network performance, they are also faced with the need to reduce space requirements and energy costs. Similarly, enterprise IT directors need to balance their increased bandwidth requirements with day-to-day needs like reducing clutter, accommodating tighter spaces, and maintaining network consistency across multiple locations. Flexible 28-gauge patch cords can address these needs. However, they do come with some design considerations, and these need to be understood by consultants, design professionals, and building owners in order to maintain the best network performance.
Small-diameter 28-gauge patch cords have been on the market for years, commonly used for data center interconnects in both end-of-row (EoR) and top-of-rack (ToR) installations. They have also been used to alleviate congestion and improve airflow in high-density areas such as telecom rooms and equipment rooms in hospitals, hotels, government, data centers, and other large facilities. And since these cords support PoE, they can also be used to power WAPs, IP cameras, VoIP devices, and AV equipment in addition to carrying data to these end devices.
28-gauge patch cords have been used for some time, and they are recognized as a category-rated solution through ANSI/TIA-568.2-D. Previously, TIA required category-rated patch cords have a 22- to 24-gauge construction, as smaller 28-gauge cords exhibit higher insertion loss, requiring the overall length of a channel be reduced to less than the industry standard 100 meters for category-rated cabling. However, due to the growing appeal of 28-gauge cords, they were recognized as a category-rated solution in June 2018. The addition of 28 gauge by TIA only applies to patch cords; horizontal cable still must be 22 to 24 gauge.
CONSIDERATIONS WITH 28-GAUGE CORDS
Under the TIA standards, using 28-gauge patch cords reduces the overall channel length from 100 meters to 96 meters, with a maximum of 6 meters of patch cords and a 90-meter permanent link. If greater lengths are required for the patch cords (up to 10 meters max), you must reduce the length of the permanent link to shorter than 90 meters.
Also, when using 28-gauge cords for remote powering, there are additional bundling requirements to ensure adequate heat dissipation as outlined in the TIA addendum TSB-184-A-1 (February 2019). The addendum provides limits on cables per bundle based on current per pair and ambient temperature, and limits bundles to 12 cables when delivering 30 watts and higher, with bundles spaced 1.5 inches apart. There are no bundle size limitations when 28-gauge cords are not being used to distribute power.
LEVITON CAT 6A HIGH FLEX PATCH CORDS
Leviton introduced high-flex small-diameter Cat 5e and Cat 6 patch cords back in 2010, and since then they have been adopted for use in enterprise and data center applications. Our new Cat 6A High-Flex Patch Cords are an effective solution for areas with limited capacity for cable management, limited cabinet space, or minimal clearance for cable bend radius. The cords allow better airflow to active equipment in panels and racks by reducing the size of cable bundles.
Learn more about Leviton High-Flex Copper Patch Cords.