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Hello, I am trying to find the centrifugal switch on the Dayton 6k385 start capacitor single phase motor (1 HP). would you know where it is or have a schematic of it ?

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Look under the toilet!

Posted on Nov 09, 2010

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Tip

How to Reverse the Rotation of Single Phase Capacitor-Start Electric Motors


Reversing the rotation of electric motors can be done easily with 3-phase motors. This can be easily achieved by swapping the connection of any two motor leads. But 3-phase motors are usually found and used for industrial purposes. The ones found and used in our homes, from water pumps to electric fans, are single phase capacitor-start type motors. Unlike 3-phase motors, reversing the rotation of single phase electric motors is no easy task. Swapping any two motor leads will not result in the reversal of the motor rotation. Analysis of the motor windings and connections are necessary before any modification can be done to achieve the desired result. Let's take a 3-speed single phase capacitor-start electric motor with electrical diagram shown below as an example. Make sure the motor is disconnected from the power supply before attempting to follow this tip. This tip is intended only for individuals with electrical knowledge, necessary tools, and understand the risks associated with handling electrical equipments and devices.

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The first step in the process is determining the start winding which is connected to the line (AC white) and to one side of the start capacitor. To accurately determine the start winding, disconnect all motor leads from the start capacitor and the speed switch for multi-speed motors and then setting your ohmmeter to the lowest scale (R x 1), measure the resistances between the AC white line and each of the motor leads connecting to the start capacitor. The one with the least resistance is the starting winding lead.

Once the start winding lead going to the capacitor is determined, reconnect the capacitor then connect the black AC line to the found start winding lead (marked X). Connect the white AC line to L of speed switch, the motor lead formerly connected to AC white to 3, red to 2, and white to 1 as shown below. Leave the green/yellow ground wire connection as is.

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Below are the wiring modifications for 2-speed and single speed single phase capacitor-start electric motors.

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on Jan 11, 2011 | Dryers

1 Answer

Is the 4A912B Dayton 10" 1 HP bench grinder 3 phase or 1 phase?


If the plug on the cord has 2 flat prongs and one round one then its 110 VAC single phase. If the motor has 4 wires then I'd suspect 3 phase. The data plate on the motor will tell you for sure.

Nov 19, 2014 | Bench Grinders

1 Answer

Motor stall


if the motor has 3 phase ( test the terminal motor for voltage) if there are the motor need repair, brushs, ball bearing, or winding faulty)
2) if the motor is 1 phase, the capacitor or centrifugal switch is faulty or windin run or starting can be faulty. However in ANY case try to TIGHT ANY wires loose or connector, or corroded contacts in the relais or contactor, clean with alcohol isopropyl or c.solvents.
God bless you

Nov 07, 2013 | Psi Ar Vip Electric Pressure Washer: 110...

1 Answer

I have a 1/3 hp motor with a capacitor. There are four motor leads coming out of motor, the capacitor is mounted in the wiring box. This motor does not have a centrifugal switch, to isolate the capacitor...


I am in the process of replacing a capacitor on a Craftsman 6 in 1/3 grinder, 2.8 amp, single phase, 110v. Not sure on the centrifugal switch. model 319.190621, ser B9530. When I took the old one out the black wire from the capacitor went to the cluster of back wires (in my case 3) in the wire nut. The blue wire from the grinder went to red wire from the capacitor in a wire nut. Hope that helps you....

Maybe you can help me... the specs on the capacitor burned off when it failed. Can you tell me what the capacitor specs are on yours?

Nov 16, 2010 | Craftsman 6" Bench Grinder with Lamp

1 Answer

I would like to connect a pressure switch to the motor starter


hi! there, single phase compressor motor need a starting capacitor base on the rated capacity in horse power,you can check this on the tag of the compressor motor how many horsepower was indicated,it should be for single phase motor starting capacitor has a capacity of micro farads.for a 1 horsepower = 15 to 18 micro farads stating capacitor if you have more than 1 horsepower you can basically proportion the value of capacitor you need or ask the dealer how much capacitor you need on your motor the connection of pressure switch with a four terminal should be connected both on common line L1 and running capacitor line L2 .if you open the cover of pressure switch there are 4 terminals,2 terminals are connected when normally close or no pressure they connected on series connection on the common line one terminal connected to common line of the compressor and the other terminal on L1 to the pushbutton switch to L1 supply line.the 2 other terminals also connected in series withe line capacitors L2 to yhr power supply line.hope this will help you a lot.just rate my fix thanks a lot.

Apr 20, 2010 | Air Tools & Compressors

1 Answer

Motor is from a table saw; it rans badly only for a short time and it blows the breaker. Thanks for info Chris Schwarzmaier Additional info: single phase 220, 2 hp, no interial centrifugal switch, start...


Check the brushes to see if they are worn. Also, check the commutator (where the brushes run) Double check the capacitors to make sure that they are the right value. Most motors that size can be wired several different ways -- make sure it's wired right for your hookup.

Dec 03, 2009 | Cars & Trucks

2 Answers

Wiring diagram for single phase two pole 2.5 HP induction motor.


all you have to do is (a) open the connection box of the motor look for the two wires of the starting or running coil, inverse only one coil wire.(a) If there is no centrifugal switch in the rotor, try this it might help open the motor both end,change the direction of the shaft ,which i mean pulley side goes to fan side and fan side goes to pulley side and tighten all bolts.

Sep 11, 2009 | Air Tools & Compressors

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