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Posted on Jan 02, 2017
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
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
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
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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