Tomorrow I'm installing a TP-Link TL-SG1008MP 8-Port Gigabit PoE+ Ethernet Switch to an existing network, powering a TP-Link OC200 Omada AP controller and three TP-Link EAP225-Outdoor access points powered over 802.3af Power over Ethernet.

Ahead of the install the client has had their team run three cables out to the locations for the APs, each 50m or shorter, from a reel and self-terminating the connections (spot where the issue probably is...!)

According to their RJ45 tester, the first of these cables run today was terminated at both ends (and also tested with existing switch and a laptop) with no connection, no test pass.

I spec'd Connectix Cat6a External F/FTP LDPE Solid core ethernet cable from Cablemonkey (UK) and also the matching 'CCS Cat6a FTP RJ45 Plug - For Solid Cable' from Cablemonkey.

  1. Is there anything obviously wrong with that spec of cable / plugs? In reading up I wanted solid core for a long run carrying POE;

  2. Is crimping plugs to solid core cable reasonably standard? The supplier had these available and mentioned compatibility, so while I haven't seen if it was a bad job in person yet, I'm wondering if I've recommended the right thing for terminating as opposed to a punch-in terminal and a patch cable to the switch / AP; what other options are there?

  3. If using a punch-in or similar connector for this kind of use to bridge to a patch cable at either end, does that pose an issue with disrupting the power supply i.e. POE?

Grateful for any suggestions / sanity checking!

Wiring diagram provided to client: Wiring diagram provided to client

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    If you use shielded cable, it must be properly grounded at least on each end, and the shield must be continuous from end-to-end. Also, the required cable category tests requires a very expensive tester. This is not a DIY project, and even experienced installer have problems with Category-6 and Category-6a cabling. Solid-core cable gets punched down, and stranded cabling uses the plugs, doing the opposite will not work correctly. – Ron Maupin Sep 3 '20 at 20:13
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    There are other problems that can happen in installation. For example, exceeding the minimum bend radius or maximum pulling tension can permanently ruin a cable, especially a solid-core cable. – Ron Maupin Sep 3 '20 at 20:15
  • Thanks Ron, I do appreciate your replies. I wondered as solid-core is typically punched down, any idea as to why suppliers offer RJ45 plug terminations that claim to be for solid core? I'd be especially grateful for any thoughts you might have on point 3 - i.e. whether a proper termination to e.g. a properly grounded face plate / back box and patch cable from there would pose an issue from the perspective of 802.3af equipment. – Ben Sep 3 '20 at 20:18
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    The grounding has nothing to do with PoE. Improperly grounded or shielded cable will be worse than UTP cabling as the shield will cause interference. That is explained in the first link of my first comment. In any case, you really need a proper (expensive) cable tester to see if the cabling passes the category test suite. Solid-core cabling is fragile, which is why it is permanently punched down as it cannot take a lot of movement. Stranded is less fragile and used for patch cables, but the performance is poor. That is why the 100 meters is 90 meters of solid-core and 10 meters of stranded. – Ron Maupin Sep 3 '20 at 20:23
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    For your Gigabit Ethernet hardware, Cat 5e is perfectly fine and much less sensitive (still neds proper installation certification though). – Zac67 Sep 3 '20 at 20:32

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