At home, the power cables in my hallway are running parallel (for about 4-5 metres) to the Cat6 UTP ethernet cables, with a gap of about 100mm. One of the ethernet cables will be PoE and the others are non-PoE.

Where one of the non-PoE ethernet cables branches off into the adjoining rooms, they do so at a perpendicular angle over the power cables. The PoE cable will continue to run without crossing over the power cable.

I haven't yet moved into the house, so haven't tested the signal or observed any issues yet.

Q: Is the 100mm gap sufficient? Or is this going to present any issues?

  • In my house I have ethernet cables running parallel to mains cables and cable-tied together. There is no problem. I assume you are using screened cables.
    – Chenmunka
    Commented Jan 26, 2022 at 11:13
  • @Chenmunka What do you mean by "screened cable"? Here is a link describing my Cat6 UTP cable: securiflex.co.uk/cat6-u-utp-colours
    – MAK AK
    Commented Jan 26, 2022 at 11:18
  • Cat-6 is normally screened to protect against interference. Most, but not all, data cables are.
    – Chenmunka
    Commented Jan 26, 2022 at 11:22
  • 1
    It'll be fine. No gap is actually required.
    – brhans
    Commented Jan 26, 2022 at 11:35
  • 1
    Ethernet runs at 100-500MHz. Compared to those frequencies, line AC is virtually the same as DC. You don't need to worry about it. Commented Jan 26, 2022 at 16:45


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