Question about AO Smith 1 1/2 HP 115/230V 56C Replacement Motor

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I want to reverse rotation on my A.O. Smith 120/230 volt single phase 1.5 HP motor. Catalog number B762

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I believe all you have to do is swap your two hot wires,that works for 3-phase but not sure on single phase

Posted on Oct 09, 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

What happen with a wrong connection on a single phase 2hp sp motor


I'm not sure which motor you have - the heading shows a 1HP type - yet you talk about a 2HP type. Anyway, the label on the motor should have a wiring diagram. You must have a label on the motor to know how to wire. It may have two diagrams - one designated as "high voltage" and the other "low voltage". Check the label for voltage.. it likely says "120/240 volts". The 120 uses the low volts diagram and the 240 uses the high volt diagram. If the motor has terminals L1 and L2, these will most likely be the point of connection for power - regardless if it 120 or 240, unless the label states otherwise. Unless the neutral connection is specified on the label, it does not matter which L1 or L2 you connect it to.

The other terminals will be required to be connected properly. Motors use these connections or jumpers to set options such as voltage, direction of rotation, speed(s), etc. An incorrect setting here can cause unexpected results as far as speed and rotation, or catastrophic results if you supply this motor with 240 volts but set the jumper for 120 volts.

Here's a link to their catalog with telephone numbers for you to review.

Good luck!

Apr 26, 2012 | A O Smith Motors A O Smith 1hp 115/230v Ur...

1 Answer

I have a new A O Smith B861 motor I want to


Thank you for posting your question here on Fixya.com.


I am not sure what you mean by "center wire". For 230V single phase you should have 2 hot line leads (115V each) and a ground wire. Set the motor leads as the nameplate shows for the high voltage connection and attach your line leads where the two lines are indicated. If you have a 3+Grd wire drop DO NOT connect the neutral, insulate it and leave it unconnected. It will not matter which line lead connects to which motor line wire as far as rotation direction. To change rotation, if the motor allows it, you reverse the start winding leads as directed on your nameplate.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!


John

Sep 17, 2010 | AO Smith A O Smith Motors A O Smith 2hp...

2 Answers

How to connect the 3 phase power supply to a 3 phase synchronous motor with control panel


I assume you have 3 phase power where this is going? The panel has 3 legs, 2 are 110 volt and one is 208 volt, you will need a tester to find out which is which if it is not marked, the motor should have a map on it for the wires to attach to, they go the same way, two, 110 and one, 208, I hope this helps, There will be one wire for a ground or a solid wire separate from the unit.

Feb 13, 2010 | AO Smith Three Phase Swimming Pool Pump...

1 Answer

Wire this motor for reverse rotation


First, take the plate where the wires connect to the motor off, and the solution is normally found in the dust cap for the wiring. If not there, go to the AO Smith website with your motor model number and there should be instructions on which of the numbered leads to group together in order to reverse the rotation. Don't worry- it's easy. Don't forget to unplug everything before changing these wires around.

Nov 24, 2009 | AO Smith 2 Hp Spl 3450rpm M56 Frame...

1 Answer

How do I wire a 30amp 3phase 250 volt receptacle for proper phase rotation ie x,y,z on the device with phases a,b,c in the panel?


You will either need a phase rotation meter to identify the rotation, or, if it is a motor, reverse any two leads to spin the motor the opposite direction (this works on single phase, too).

i hope this is helpful
matthew

Oct 31, 2009 | Gb Electrical 1 30 Amp Ground Fault...

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