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If an Alternating Current (a/c) motor is bad.
The resistance will read very hi as in an open winding. ie: meg ohms
Or very low as in a shorted winding. ie: 0.01 ohms
It must not read any resistance to the housing or shaft.
The resistance between leads should be a reasonable value and can be determined with : electromotive force divided by inductance equals resistance.
example: 215 volt alternating current with name plate full load amperes of 10 should read very near 21.5 ohms resistance between leads.
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Is 160 ohms reading on a switch bad?
For a switch the reading should be in the zero ohm range. Corrosion or pitted contacts will start to raise the resistance rating on a switch. This size of rating on the switch will start to raise the temperature of the switch because the switch starts to act like a load in the circuit.
Can a bad condenser stop a motor from starting?
Yes. A shorted condenser will load the electrical supply and prevent the starter from creating the mechanical force necessary to turn over a motor.
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The wiring diagram is on the tag on the new motor. The two additional wires are either for rotation reversal or it`s a dual voltage motor. If dual voltage you must determine what voltage you are using and follow the diagram to match the motor to it. If there are any unused motor leads they must be capped individually.
Why does half of my house have electricity and the other half doesn't with no circuit breakers poped?
as an electrician i would first check the main breaker with a rated voltage tester for voltage i would first ckeck the meter side by placing one tester lead on one of incoming phases or wire and place second lead on the other phase or other wire. i should read 240, or 230, or 220 volts depending on where the taps are in the transformer. if not call the power company. if it does read any of them voltages i would then check the load side of the main breaker by putting my leads on one breaker and the one right below it generally every other breaker is a different phase again i should read 240 volts or close. if not the main breaker may be bad. if you know what breaker or circuit its on you could test it by placing one lead on the screw where the wire is and the other on the neutral or ground bar here you should read 120 volts or close if not breaker is bad. it maybe as easy as tightening the screw or screws so shut the breaker off first and then tighten.
What is the standard reading in megger testing to conclude that the equipment is passed and or failed?
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How do you test an outboard motor coil?
Test your two primary points with ohms should read zero - where your spark plug wire goes in is your secondary - test it with one primary point should read resistance then test other primary point with secondary should read the same - coil is good - if two primary are not zero bad coil - if second with primary read zero coil is bad.
How do you know if a three phase motor's winding is shorted?
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If the ohms are infinite or greater than one megohm you can conclude the cable is bad. Usually if the ohms are greater than 3 ohms the cable is bad. If the cable is less than 3 ohms it depends on what the cable is used for and how long it is.
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Find out the ohms range it must be within and do an ohms test.
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Check ignition coils with an ohm meter. spark plug wires and plugs.. Should all read the same ohms close
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If you have a bad O2 sensor you should have a check engine light on. Using a diagnostic scanning device you can read the code(s) set in the cars computor. The code(s) will tell you which sensor is bad. Many auto parts store can read your cars codes for you if you purchase the parts necessary to repair the problem from them.
Is there a way to test a crankshaft sensor without a code puller?
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How can you tell you have a bad coil on a 1968 Mustang?
Test it Primary resistance 1.40 to 1.54 ohms secondary resistance 7600-8800 ohms primary circuit resistor 1.30 to 1.40 ohms
