Septic system electrical lines

Discussion in 'Electrical Forum discussion & Blog' started by RichRose, Jun 24, 2014.

  1. RichRose

    RichRose New Member

    Messages:
    4
    Location:
    MN
    When my mound septic system was installed about 15 years ago the electrical lines for the septic pump and alarm were both just buried about a foot underground. Recently one of the great Minnesota gophers chewed through the main power cord and it shorted so bad I couldn't get the breaker to stay on. I am going to replace the power lines out to the tank but put them in PVC conduit. (Hopefully gopher proof) I was wondering if I can have both the main electrical wire to the pump and the low voltage wire to the alarm float in the same conduit? Thanks
  2. RichRose

    RichRose New Member

    Messages:
    4
    Location:
    MN
    Thanks, HJ! I appreciate the help.
  3. Vegas_sparky

    Vegas_sparky Digital Billy

    Messages:
    417
    Location:
    LV,NV/ Nowhere,UT
    Is your alarm float just a set of dry contacts? Basically, the tank gets close to full, and a switch is closed for a light/audible? You can run them together if the insulation on every conductor is rated for the highest voltage in the conduit. Induction typcally isn't a problem unless you're dealing with analog signals, and high current loads. I doubt you have either.
  4. ActionDave

    ActionDave Electrician

    Messages:
    368
    Location:
    Colorado
    I agree with the man in sin city.
  5. RichRose

    RichRose New Member

    Messages:
    4
    Location:
    MN
    Thanks guys, The float alarm sets off an audible signal in the house. I did contact a local electrician yesterday and he advised me that they could both go in the same conduit. I will use a 12-2 UF line for both even though he said I could use 14-2. I can get 250 feet of the 12-2 cheaper than buying a spool each of 100ft. Thanks again for the responses. First time using this forum and I'm impressed with the help. Rich
  6. Speedy Petey

    Speedy Petey Licensed Electrical Contractor

    Messages:
    1,015
    Location:
    NY State, USA
    First off, WHY are you running UF in conduit?? It's legal, but not a good idea and a royal pain to pull in.
    Also, every septic system I have ever done had line voltage floats and alarms. Are you sure yours is low voltage?
  7. RichRose

    RichRose New Member

    Messages:
    4
    Location:
    MN
    Thanks Speedy Petey for the concerns. The tank alert is an SJE 101 series built in 1996. As far as I can tell the line that runs to the float is 12 volts. The use of UF wire was advised by several people. Seems in Mn, even if it is in a conduit it has to be rated for underground use. My next decision is if I use 3/4 or 1 inch PVC conduit. I think I'll go with the 1 inch to make it easier to pull through. Again the present wires that run from my house are 14-2 UF and 12-2 UF but are not in a conduit, with the 12-2 having been eaten through by a gopher. Funny thing is there was no dead gopher where I found the break. Thanks again for all the questions. I'm not one to jump in quickly, especially with electricity, and you all have helped me slow down and make sure of my decisions. Thanks, Rich
  8. jbfan74

    jbfan74 Electrical Contractor

    Messages:
    131
    Location:
    Newnan, GA
    Use thwn wire instead of the uf and make your life easier when pulling.
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