AboutCharles C. Jones Expertise Let Me help you with your problems with single phase and three phase electric motors. I can tell you how to troubleshoot your motor problems. From simple testing of capacitors, how to test your windings, replacing bearings, and general maintance. Before we go any further, remember these words of advice: Disconnect the power before you do anything! Please limit your questions to electric motors and there immediate components. I review each question, and if I can answer or help, then I will. If you receive a rejection, it means it is out of my expertise, and just do not have the answer. I'll be waiting for your question, and see if I can help you. Thanks for using AllExperts!
Experience I have 30 years experience in the repair of electric motors and related equipment. I am a master machinist in the field of motor repair. I have been employed with my company for 27 years. When you ask your question, give me all the information you can about your problem. I have a lots more to add, but for the everyday do-it yourself kinda person, it might get to technical. So ask away, if I can't give you a good answer, I'll find someone who can
Expert: Charles C. Jones Date: 6/17/2008 Subject: How do I wire a HVAC squirrel cage blower?
Question QUESTION: I have a double squirrel cage blower without any markings on it. It has five wires ( blue , red , yellow, black , white ). It has a large capacitor on it. How do I wire it to come on with a single pull switch? I don't want to experiment and burn it out.
ANSWER: Can you advise what voltage it is? This will determine whether you can use a single pole or double switch.
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QUESTION: I really don't know what the voltage is. There are no markings on the unit. It is built to use with hvac equipment. Most big ac units are 220 v, are they not? I was also thinking that you could use it with 110 or 220 systems ( ie wire the black to one 110 circuit and the red to another ). I have no clue what I am talking about.
Answer These units are not dual voltage. Black, red, blue, and yellow are the speeds. White is common. For 115 volts, black goes to the top of a single pole switch, and black from line to the bottom. White ties to white from line. For 220 volts, black and white from motor to the top of a double pole switch, and black and white from line to bottom. Black from the motor is usually the high speed. Putting 220 volts on a 110 volt motor will probably destroy it immediately. putting 110 volts on a motor connected 220 will make the motor run, but will soon overload and burn out the windings.
