(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 14 of 14

Thread: making a230 volt run on 120volt well pump

  1. #1
    DIY Junior Member richwelder's Avatar
    Join Date
    Nov 2012
    Location
    illnois
    Posts
    5

    Default making a230 volt run on 120volt well pump

    i have a franklin electric wiring box -model 2801054915 hp1/2. volts 230 . i opened up the box and i was reading both 115and 220 volt diagrams . i would like to be able to run 115 side if needed . my genarator does not have the high starting amps to fire up that [ resistor or coil thing] thanku if some can shed some light on my problem

  2. #2
    Moderator valveman's Avatar
    Join Date
    Mar 2006
    Location
    Lubbock, Texas
    Posts
    4,175

    Default

    You can't run a 230V pump on a 115V generator. The starting amps from a generator will be much lower for a 230V pump than a 115V pump.

  3. #3
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,662

    Default

    Quote Originally Posted by richwelder View Post
    i have a franklin electric wiring box -model 2801054915 hp1/2. volts 230 . i opened up the box and i was reading both 115and 220 volt diagrams . i would like to be able to run 115 side if needed . my genarator does not have the high starting amps to fire up that [ resistor or coil thing] thanku if some can shed some light on my problem

    The Current will double if you run it in 115.

    If your generator can provide the needed power then you could use a 1-2 step-up transformer.

    You should over rate for losses. If you figure 50% loss then you should have no problems running a motor, If you have enough start-up power, and use big enough wire conductors.

    You may be better off getting a 230 Volt Generator, That runs on natural gas.


    Be careful playing with electricity.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  4. #4
    DIY Junior Member richwelder's Avatar
    Join Date
    Nov 2012
    Location
    illnois
    Posts
    5

    Default

    Quote Originally Posted by valveman View Post
    You can't run a 230V pump on a 115V generator. The starting amps from a generator will be much lower for a 230V pump than a 115V pump.
    i am sorry not to give more information my genarator is 4000 watts 30 amps running 220 i beleave i am a couple amps short

  5. #5
    DIY Junior Member richwelder's Avatar
    Join Date
    Nov 2012
    Location
    illnois
    Posts
    5

    Default

    yes sir i have 1977 onan rv Genarator 4000 watt 220 or 120 - 30/16 amps at 1800 rpm gas but recentlt converted to propane in my basement with a costom exshaust . i went to mcmaster carr i didnt see dcto ac transformers . i see the step ups 220/440 butt 440 makes me littel nerves . i do need to boost my amp from30 to maybe 40 i think that should doit

  6. #6
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,689

    Default

    Quote Originally Posted by richwelder View Post
    ...i do need to boost my amp from30 to maybe 40 i think that should doit
    I think you got that wrong. Your genset, by your spec will only provide 16 amps to your pump at 240 (220). A buck/boost won't change that.

    A 1/2HP pump should work on a 15 amp breaker but the locked rotor amps are much higher. You need a bigger generator.
    http://www.terrylove.com/forums/show...bmersible-pump

  7. #7
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,679

    Default

    There is no such thing as as DC to AC transformer. You need an inverter to do that, but when you start talking about 220 to 440 transformers, then I get a very definite feeling that you have absolutely no idea what you are trying to do. You can "jiggle" the voltage all you want, but you will ALWAYS wind up with the same amperage, or less, than you started with. If your generator will not run your 220/240 pump, then you need a different generator, not a different voltage.
    Licensed residential and commercial plumber

  8. #8
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,662

    Default

    Quote Originally Posted by richwelder View Post
    yes sir i have 1977 onan rv Genarator 4000 watt 220 or 120 - 30/16 amps at 1800 rpm gas but recentlt converted to propane in my basement with a costom exshaust . i went to mcmaster carr i didnt see dcto ac transformers . i see the step ups 220/440 butt 440 makes me littel nerves . i do need to boost my amp from30 to maybe 40 i think that should doit
    Not sure what all mods that you made other that fuel type, That was a smart move.

    As long as the gen is running 1800 rpm if designed for that (some gas models are originally rated at 3600rpm for 60HZ out)

    A 4000 watt generator should have no problem running a 1/2 horse water pump motor.

    1/2 horse is less than 400 watts. Of course you have to add Loss. Even at 50 % loss you have plenty of power. (but not for the whole house at the same time, IE air conditioners also)


    You should check your gen output frequency and wiring.

    You should have the proper Switchover / Transfer switch installed also.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  9. #9
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,689

    Default

    Quote Originally Posted by DonL View Post
    A 4000 watt generator should have no problem running a 1/2 horse water pump motor.
    Maybe he doesn't have a 4000 watt generator. Did you do the math based on the volts and amps the OP claims the unit puts out?

    By my calcs he is coming up way short.

  10. #10
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,662

    Default

    Quote Originally Posted by LLigetfa View Post
    Maybe he doesn't have a 4000 watt generator. Did you do the math based on the volts and amps the OP claims the unit puts out?

    By my calcs he is coming up way short.

    Even if it was a 3000 watt gen then it should run a 1/2 horse water pump.

    It is probably a 8 hp gen.

    If it don't work then it is wired wrong.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  11. #11
    DIY Junior Member richwelder's Avatar
    Join Date
    Nov 2012
    Location
    illnois
    Posts
    5

    Default thanks

    Quote Originally Posted by richwelder View Post
    i have a franklin electric wiring box -model 2801054915 hp1/2. volts 230 . i opened up the box and i was reading both 115and 220 volt diagrams . i would like to be able to run 115 side if needed . my genarator does not have the high starting amps to fire up that [ resistor or coil thing] thanku if some can shed some light on my problem
    i thank u all but i think should go back and start from scratch

  12. #12
    Moderator valveman's Avatar
    Join Date
    Mar 2006
    Location
    Lubbock, Texas
    Posts
    4,175

    Default

    Starting from scratch, you can't wire or run a 230 volt motor from a 115 volt gererator, unless you use a buck/boost transformer to transform 115v to 230v first. Even a 2,000 watt generator will start a 1/2 HP pump, but the generator has to put out 230 volts.

  13. #13
    DIY Junior Member richwelder's Avatar
    Join Date
    Nov 2012
    Location
    illnois
    Posts
    5

    Default

    Quote Originally Posted by valveman View Post
    Starting from scratch, you can't wire or run a 230 volt motor from a 115 volt gererator, unless you use a buck/boost transformer to transform 115v to 230v first. Even a 2,000 watt generator will start a 1/2 HP pump, but the generator has to put out 230 volts.
    ok something not making sense . i tested the volts coming out of the gen. and got 225 at 1800 to 2000 rpm the well would not turn on so then i made the mistake[months ago] of idleing up to 277 volts my lights almost blew up . fried the computer a tv ,gfi breaker and a coulpe power strips .that said my well needs 27 or 32 amps to kick on my max amp is only 30 but i dont know if it 30 on 120 or 220 [30/16] amps can it draw more amps on 120 or 220? whats the buck booster

  14. #14
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,662

    Default

    Quote Originally Posted by richwelder View Post
    ok something not making sense . i tested the volts coming out of the gen. and got 225 at 1800 to 2000 rpm the well would not turn on so then i made the mistake[months ago] of idleing up to 277 volts my lights almost blew up . fried the computer a tv ,gfi breaker and a coulpe power strips .that said my well needs 27 or 32 amps to kick on my max amp is only 30 but i dont know if it 30 on 120 or 220 [30/16] amps can it draw more amps on 120 or 220? whats the buck booster
    The 30Amp would be the 120Volt rating and the 16Amp would be the 220Volt for the generator output.

    You can not just increase the RPM to make more voltage, The gen needs to stay at 60 HZ out, so the gen needs to be at 1800RPM or your AC frequency will be off. The voltage you get is the voltage you get, Unless the generator has a voltage tap.

    If the Pump motor is made to operate at 230v then it will most likely operate at 220V.

    I do not see a 1/2 horse well-pump motor Needing more power than your gen can supply, If it is working properly. But it needs to be wired to the correct voltage.

    A 1/2 Horse Pump Motor should not require 27 or 32 amps at 220V to kick on. Maybe it is a 120V pump motor ? Your Gen should run a 1/2 horse motor if it is working properly and is wired correctly.

    Forget a buck booster if your power supply is not sufficient.
    Last edited by DonL; 11-14-2012 at 09:30 AM.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

Similar Threads

  1. Heat Pump inside unite making clicking noise.
    By CentralTXPreacher in forum HVAC Heating & Cooling
    Replies: 3
    Last Post: 04-27-2012, 12:36 AM
  2. Well Pump making loud banging noise
    By armeca in forum Pumps and Tanks Well Forum & Blog
    Replies: 8
    Last Post: 08-29-2010, 08:20 AM
  3. 230 Volt?
    By AZ Contractor in forum HVAC Heating & Cooling
    Replies: 5
    Last Post: 09-24-2007, 09:29 AM
  4. 12 volt DC/Solar pump
    By dscogin in forum Irrigation / Sprinkler Forum
    Replies: 2
    Last Post: 07-24-2007, 08:54 AM
  5. 12 volt transformer
    By Snafu34 in forum Electrical Forum discussion & Blog
    Replies: 13
    Last Post: 06-28-2007, 08:58 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •