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View Diary: Ask Mister Preparedness Guy: all answers 5¢ (152 comments)

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  •  No clue (none)
    How would I determine such?  

    The Christian Right is neither Witness Every Day

    by TXsharon on Mon Oct 03, 2005 at 11:42:14 AM PDT

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    •  Printed on the pump (none)
      Almost all electronic equipment has a label indicating voltage and amperage requirements on it somewhere. You're looking for a label reading something like: "Input 220V AC 2A" or "Input 16V DC 4A"

      If you can find the make and model of the pump instead, you may be able to find out by looking on the manufacturer's web site or by calling the manufacturer.

    •  Hmm... (none)
      Kind of hard to read the label on a submersible pump.  If you have the documentation which came with it when it was installed, that might tell you.  Likewise, if you know what company put it in they might be able to answer your question.

      Failing that, you should be able to trace the power line back to a breaker box somewhere.  An electrician, or even a layman who has basic electrician skills, should be able to look at the wiring and tell you if it runs off of 110VAC or 220VAC.

      If the pump plugs into an outlet of some sort, that's even easier -- the type of outlet will tell you what voltage it runs on.


      You are so evolved it boggles my fragile little mind. Now give me a 4, fucker. (Bill In Portland Maine, to Meteor Blades)

      by AlphaGeek on Mon Oct 03, 2005 at 11:51:15 AM PDT

      [ Parent ]

      •  Pumps (none)
        are almost always 240 volt (or 220 volt - same thing) and if they run off the house's electricity they're AC.

        In most breaker panels (depends on mfg though) a 120 volt breaker takes up one space, a 240 volt breaker takes up two spaces. The amperage rating will be the little number on the "switch" part of the breaker - probably a "5" or a "10". The breaker is sized for more current than the pump needs - the pump probably draws about 80% of the breaker rating.

        You also need to know if your pump has a pump control (which basically helps the pump start without drawing too much current) - most do, I think. It'll usually be near the breaker box or pressure tank. You want to wire your backup power behind the control, not between the control and the pump. And of course, make sure to turn off or disconnect the breaker before connecting a generator or other supply (even if the power is out - you don't control when it will come back on, and your generator can endanger linemen).

        We all go a little mad sometimes - Norman Bates

        by badger on Mon Oct 03, 2005 at 12:47:01 PM PDT

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