With the upcoming ratification of the IEEE 802.3BT as a 4-Pair PoE standard, a new focus is being placed on the cabling bundle sizes and the potential increase in temperatures that the cabling may experience with higher power loads and bundled together . When multiple cables and cords are bundled together, the cables/cords most internal to larger bundles are not able to dissipate as much heat as loose cables. This can cause an issue when trying to stay within the +15 degree max temperature increase guidelines recommended by TIA TSB-148 (Technical Service Bulletin) in order to maintain cable transmission performance. Tight bundling of smaller conductor cords (28 awg) should probably avoided altogether when supporting higher power Poe.
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