Forum Discussion

BFL13's avatar
BFL13
Explorer II
May 27, 2021

120v Wires Near 12v Wires - -Problem?

Reading not to put a charger's 120v wires in with its 12v wires in same conduit.

I have 120v wires into a charger and out of an inverter all mixed in with various 12v wires in a haphazard way under a dinette seat where some are close together. Haven't noticed any "issues" (but there might be some un-noticed)

What are the possible issues? Thanks.

From Renogy DC-DC-MPPT manual, "Do not lay the AC cable and DC cable in the same conduit (empty pipe)."
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    May 27, 2021
    Couple issues
    Induced noise
    Confusion later on is that a 120VAC or is that a 12VDC neutral/ground---hot?

    All wires should be 600V Rating
  • jdc1's avatar
    jdc1
    Explorer II
    May 27, 2021
    Remember back when you had a lot of static on you radio? I would not worry too much about it.
  • Dusty_R's avatar
    Dusty_R
    Explorer
    May 27, 2021
    I haven't worked as an electrician since 2001 but back then the National Electrical Code required that when low voltage wires run in the same conduit as 120 + volt wires they needed to both be rated to carry the same voltage.
  • BB_TX's avatar
    BB_TX
    Nomad
    May 27, 2021
    Close together is a lot different than in the same conduit.
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    May 27, 2021
    BB_TX wrote:
    Close together is a lot different than in the same conduit.


    On that. we agree.

    I do not know if they shared a loom on my RV or not (no conduits just wire wraps) but other than inductive coupling I can not see any serious issues

    Still best to not do it if you can do it differently.
  • 2oldman's avatar
    2oldman
    Explorer II
    May 27, 2021
    BFL13 wrote:
    Didn't think of Google for that! Seems not to apply to my under-dinette situation/wiring zoo.
    Yes, I forgot to include "under dinette" in the search.
  • BFL13's avatar
    BFL13
    Explorer II
    May 27, 2021
    2oldman wrote:
    BFL13 wrote:
    Didn't think of Google for that! Seems not to apply to my under-dinette situation/wiring zoo.
    Yes, I forgot to include "under dinette" in the search.


    What I meant to say, if it was taken another way (not clear), was that Google info was very useful. It seemed not to apply to me, where it said about wires in parallel and so on.

    I think I am good from that and the comment that close together is not the same as in a conduit.

    Thanks, all! Forum saves the day again. :)

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,188 PostsLatest Activity: Jan 19, 2025