If you are trying to break the ground loop by just using the injector as an isolation transformer, grounding is not really adding anything. It certainly would not hurt to ground it but it is not necessary for this application.
From: Jaime Solorza Sent: Monday, January 22, 2018 8:47 AM To: Animal Farm Subject: Re: [AFMUG] Use Unpowered PoE Injector on Long Ethernet Runs? Por que no? Splain it to me on no grounding? Jaime Solorza On Jan 22, 2018 8:43 AM, "Chuck McCown" <[email protected]> wrote: I wouldn’t worry about grounding it. From: Christopher Gray Sent: Monday, January 22, 2018 8:41 AM To: [email protected] Subject: Re: [AFMUG] Use Unpowered PoE Injector on Long Ethernet Runs? Of course :-). If your primary goal was to prevent a ground loop, would you ground the surge suppressor, or just use it to isolate the path? If the lines were shielded, would you keep one of the shields disconnected intentionally at the surge suppressor? On Mon, Jan 22, 2018 at 10:34 AM, Chuck McCown <[email protected]> wrote: Well, of course I prefer a different method: https://www.mccowntech.com/product/outdoor-gige-ethernet-poe-injector/ From: Christopher Gray Sent: Monday, January 22, 2018 8:28 AM To: [email protected] Subject: Re: [AFMUG] Use Unpowered PoE Injector on Long Ethernet Runs? That cable is not shielded (so the shields would not be connected). The Gigabit PoE that comes with Cambium ePMP hardware has a full set of magnetics (all pairs). ---------------------------------------------------------------------------- On Mon, Jan 22, 2018 at 10:23 AM, Chuck McCown <[email protected]> wrote: Is the cable shielded? From: Christopher Gray Sent: Monday, January 22, 2018 8:17 AM To: [email protected] Subject: [AFMUG] Use Unpowered PoE Injector on Long Ethernet Runs? I have a customer with bizarre issues. I've replaced almost everything but odd issues keep coming back. The customer has a 100' run of Ethernet cable from the house to the barn, and a switch in the barn. I'm wondering if there might be an issue with different power sources, possibly different grounds between the router and the switch. The issues are intermittent enough that I can't ask for them to just disconnect their barn as it is used for work. If I install an unpowered gigabit PoE injector in-line with that 100' run, will that eliminate any issues with different power or different grounds between different buildings since the buildings would be on separate sides of the magnetics, or do I need better separation?
