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How to wire a single phase 115v cap start motor (T-1,3&5)and(T-2,4&8)(Swapping 8&5 for direction) To a 3 phase type (6 terminal) drum switch for that swap?

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Posted on Jan 02, 2017

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SOURCE: rewiring mootor from 230v down to 115v

Diagram for aosmith motor b381 is here: http://www.electricmotorwarehouse.com/IMAGES/B381_connection.htm

However, I believe that this motor will be more efficient at 230v depending on load conditions. At 115v this motor will draw more amps and tend to run hot, but situation rules. Enjoy

Posted on Dec 14, 2008

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SOURCE: converting 3 phase compressor to single phase

Start w/ a single phase motor. Or maybe your question is just confuseing me.

Posted on Sep 12, 2009

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SOURCE: I'm trying to figure out how to wire a 5hp motor

Go to the website for the motor manufacturer- it will show how these capacitors are to be wired. You'll need the motor model number.

Posted on Nov 24, 2009

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SOURCE: have a 3 phase 7.5 HP IR compressor,want to put a

You will use two of the original three wires. Not knowing if you have a motor starter and how it is wired makes it impossible to give you details.

BE AWARE that a 7.5 HP single phase motor is going to draw a massive starting surge compared to a three phase motor. I assume this is on a 240 volt system as it would NOT be practical to use a motor that size on a 120 volt system.

Expect to require around a 30 to 50 amp single phase feed to the motor.

Posted on Dec 20, 2009

compman66
  • 169 Answers

SOURCE: i bought a new electric motor ml7112 series and

does it have capacitors on the motor (humped covers on top) If not then it may ot be a single phase. also on the motor name plate or on the inside cover of the connector box it should have wiring diaphragm that will tell you how to wire the motor, single phase motor will show 2 line connections and a three phase will show 3 line connections,,, line connections are represented by L-1 L-2 L-3 these mean incoming power.

Posted on Jan 25, 2010

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2 Answers

How to reverse rotation of single phase, 1/2 HP, 110V electric motor.


Changing the "polarity" of the start winding by swapping the wires over should reverse the direction. Lots of online motor-related generic and manufacturer information is available.

Feb 16, 2015 | Air Tools & Compressors

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

How do I reverse a three phase electric motor?


Reversing rotation of 3 phase motors:
CAUTION: Before attempting any repair of electrical equipment verify the power is disconnected to the device.
CAUTION: Three phase motors could potentially be controlled by frequency control systems. It is recommended a trained electrician perform repairs to any electrical system. In particular, consult a trained electrician if the system includes a frequency control system.

Most 3 phase motors can reverse rotation simply by swapping any 2 of the 3 phase wires. A typical 3 phase wiring circuit will include a safety ground wire (usually green) and 3 phase wires, often designated A/B/C, or 1/2/3, or color coded to distinguish each. By swapping the terminal connection of any 2 of the three phase wires, for example, 1 & 2 or 2 & 3 or 1 & 3, but leaving the third phase wire unchanged will reverse the rotation of most motors.

Jun 12, 2014 | Hayward 1.5hp Pool Pump Motor Motor A O...

1 Answer

Old motor wires are numbered new motor wires are colored this is a 1/2 hp reversing motor for a overhead door


Single Phase Terminal Markings Identified By Color: (NEMA Standards) 1-Blue 5-Black P1-No color assigned 2-White 6-No color assigned P2-Brown 3-Orange 7-No color assigned 4-Yellow 8-Red

Mar 02, 2014 | Computers & Internet

1 Answer

Wiring diagram 3/4 hp boat lift motor


It will be dependent upon the line voltage and switching mechanism...

Please advise drum switch or relays?
115V or 230V
Remote control present?

If a drum switch, is it a 6 or 12 terminal model or some other configuration?
Make and model of the switch?

There may be more questions depending on the answers to these...do you have a wiring diagram for the control? Are you replacing a motor and have the old and new motor schematics?

John

Apr 10, 2011 | AO Smith A O Smith Motors Century 1hp 115v...

1 Answer

I have a new water heater, and the hook up terminals are labled 1-2-3 are they hooked the same as in the panel 1-2-3 ?


No. You have to find out if you have 3 phase or single phase power. If this is a new unit you will find a wiring diagram inside the front cover. 3 phase power has 3 "hot" wires. Single phase has 2 "hot" wires. There is a big difference when you hook it up wrong. I don't know if this is a new installation or if you are replacing an old one. The terminals are numbered for 3 phase. If you look in your breaker box, 3 phase 208 will haven a breaker with 3 spaces hooked together by one bar. Single phase will have two spaces hooked together by a bar. So if the breaker kicks out it will flip all 3 space on 3 phase or 2 spaces on single phase. If you already have wires to the location of the booster heater, you may have to use single phase if that is all that is at that location. If you have single phase power you will have to look at the wiring diagram and you will see the terminal block represented for both single and 3 phase. Normally running from the terminal block will be six wires marked 1 through 6. The wireing diagram will say something like "for single phase put 1,3,5 on terminal 1 and 2,4,6 on terminal 3. Leave terminal 2 out all together. Of course at this point your 2 hot wires will go to terminal 1 and 3. There are other considerations as well. With 3 phase the circuit wires will be smaller gauge and may not carry the current you need for single phase. This is a booster heater. You need to hook up your hot water line to go into the heater and the boosted hot water to your appliance. It will not work to heat your water for other purposes. It is meant to take 140 degree water and boost it to 190 degrees. Good luck, hope this helps

Sep 11, 2010 | Hatco Corporation Compact Electric Booster...

1 Answer

I bought a new electric motor ml7112 series and


does it have capacitors on the motor (humped covers on top) If not then it may ot be a single phase. also on the motor name plate or on the inside cover of the connector box it should have wiring diaphragm that will tell you how to wire the motor, single phase motor will show 2 line connections and a three phase will show 3 line connections,,, line connections are represented by L-1 L-2 L-3 these mean incoming power.

Jan 24, 2010 | Electric Air Tools & Compressors

1 Answer

How to wire a 3 phace 5 hp baldor motor


the neutral or white is not used. if the fourth wire is a ground then it goes to the motor frame. if it is a dual voltage motor then here is the wiring: for 240 volt 3 phase connect 4-5-6 together and tape, 3-9 goes on L1, 2-8 together goes on L2, 1-7 together goes on L3. To reverse direction swap any two line wires. For 480 volts 3 phase: L1 goes on T1, L2 goes on T2, L3 goes on T3. Connect together T6-T9 and tape, connect T5-T8 and tape, connect T4-T7 and tape. again to reverse direction swap two line wires.

Oct 14, 2009 | Baldor 115v,1ph, 3,600rpm 7" 1/2hpbnch...

2 Answers

Rewiring mootor from 230v down to 115v


Diagram for aosmith motor b381 is here: http://www.electricmotorwarehouse.com/IMAGES/B381_connection.htm

However, I believe that this motor will be more efficient at 230v depending on load conditions. At 115v this motor will draw more amps and tend to run hot, but situation rules. Enjoy

Dec 13, 2008 | AO Smith 2 Hp Spl 3450rpm M56 Frame...

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