From: nojunk@knology.net   
      
   On 3/21/2018 10:08 AM, I can't do that Dave wrote:   
   > Hi,   
   >   
   > We have a swamp cooler and it is getting close to the time to put it into   
   daily service. When the 1/2hp fan motor switches from Low to High, or High to   
   Low, there s a short delay and then it starts up again. All good since it is a   
   two-speed motor.   
   >   
   > But when it starts each time the lights in the house momentarily dim, so I   
   am wondering if it is possible to buy a soft-start whatever and wire it in   
   between the motor and controller.   
   >   
   > Last year I asked on groups about the swamp and dimming lights, but no one   
   mentioned a soft start, but instead suggested I get the wiring checked. Got an   
   Electrician in and he gave the entire house a clean bill of health. No   
   surprise really, the guy    
   who built the house was an Electrician in the Navy for thirty years.   
   >   
   > I checked Amazon and can find nothing, but Wiki mentions them for   
   three-phase motors.   
   >   
   > Thoughts?   
   >   
      
     Does the wiring to the 1/2hp motor go directly back to the breaker box.   
     Just doesn't seem like it should cause the lights to dim.   
     Which lights?   
   You have 220V coming in, which phase is it on? (I'm assuming it's a 120V   
   motor)   
     Does it help to switch that motor to the other phase?   
   Could there be a poor connection on your incoming lines.   
     Do you have an electric dryer?   
     An interesting test would be to monitor the voltage of one phase   
   while you start the dryer, then repeat for the other phase.   
   See if there is a difference in the voltage drop.   
     You might need to remove any loads that might be drawing current,   
   fridges, freezers, sump pump, furnace, air conditioner, to get a more   
   accurate test.   
      
                                 Mikek   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)