Running analog signal sensors cables in the same conduit than PV DC power cables

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josealjim
josealjim Solar Expert Posts: 33 ✭
in General Solar Power Topics #1
Hi everyone,
WHat do you think about running the analog signal cables (pyranometer and TC at the solar field ) into the same conduit than DC power cables?
The trench for the DC power cables is already covered so if we dont open it again to install another conduit we would have to run the analog signal cables into the same conduit. Another option is to transfer the data with wireless adapter supplied by 230 v from another part of the building (it would be more expensive)

Could I run the cable into the same conduit?

Thanks
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  • zoneblue
    zoneblue Solar Expert Posts: 1,220 ✭✭✭✭
    #2
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    Re: Running analog signal sensors cables in the same conduit than PV DC power cables

    Analog you say? Depends on how fragile a signal, how long the trench, and whats going through the DC cables. If its PV cables, i would say that there shouldnt be much noise on those, at least if its a mppt controller. A PWM controller would be another story. You might have to try it and see. Can you get some sheilded cable perhaps? Audio or similar...
    1.8kWp CSUN, 10kWh AGM, Midnite Classic 150, Outback VFX3024E,
    http://zoneblue.org/cms/page.php?view=off-grid-solar


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  • Mustang65
    Mustang65 Solar Expert Posts: 42 ✭✭
    #3
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    Re: Running analog signal sensors cables in the same conduit than PV DC power cables

    Use CAT5/6 cable and you should be OK. We ran CAT5 along with the Central Office 48VDC cables in the same wire racks. Never had any issues. AC is a different story.

    Don
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #4
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    Re: Running analog signal sensors cables in the same conduit than PV DC power cables
    josealjim wrote: »
    Hi everyone,
    WHat do you think about running the analog signal cables (pyranometer and TC at the solar field ) into the same conduit than DC power cables?...

    Sounds like very low level signals, try with double shield twisted pair, and you will find if you have to re dig the trench.
    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
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  • zoneblue
    zoneblue Solar Expert Posts: 1,220 ✭✭✭✭
    #5
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    Re: Running analog signal sensors cables in the same conduit than PV DC power cables
    mike95490 wrote: »
    Sounds like very low level signals, try with double shield twisted pair, and you will find if you have to re dig the trench.

    Yes cat6 should work well. Cat 7 if you can get it.
    1.8kWp CSUN, 10kWh AGM, Midnite Classic 150, Outback VFX3024E,
    http://zoneblue.org/cms/page.php?view=off-grid-solar


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