I plan on upgrading my home Wireless Access Point in the near future and rather than running an extension cord to the location I was thinking about getting a WAP that supports Power Over Ethernet.

My concern is, since there is DC flowing thru the cable, will it cause interference with neighboring non-PoE Ethernet cables?

The PoE cable path will run parallel in a bundle to several Ethernet cables and cross another bundle of Ethernet cables.


No, not a bit. Twisted pair cables are HIGHLY resistant to interference pickup. Furthermore, DC does not cause interference, since it is basically an unchanging current, so there's no change in magnetic fields from it to cause interference (other than when turned on, and off - and the twisted pair cables will reject that interference by design, anyway.)

I have many bundles of cables including POE cables in my work role. Interference is not a factor.

  • 2
    Just to clarify, there isn't any POE cable per se... Any cat5e or cat6 will do. – Kris Apr 26 '17 at 21:33
  • Though certain types of cat-X cables shouldn't be used, like copper-clad aluminum. – Steve Apr 26 '17 at 21:58
  • 2
    CCA (copper-clad aluminum) should not be used, (or bought) period. Horrible wire. A "POE cable," in context, is a Cat 5e or Cat6 or Cat6A cable that happens to be attached to a POE injector or switch and a device that uses POE. – Ecnerwal Apr 28 '17 at 2:50

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