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Q: Does all three leads read amps in a 240 volt motor?
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What size of circuit breaker do you use for 25amperes induction motor?

Read the specification plate on the motor to determine the amount of current that the motor uses, as well as the voltage and phase. Most likely, it will be a 3 phase motor, so you can't simply connect it to your house wiring, but without sufficient information, it is impossible to tell you all of the specifics. <<>> The code book rates the amperage of a three phase 40 HP motor by different voltages. at 200 volts - 120 amps, 230 volts - 104 amps, 460 volts - 52 amps and 575 volts - 52 amps. A breaker for a motor has to be sized to 250% of the motors full load amps. Also the wire size for a motor has to be 125% of the motor full load amps.


How many amps does a 5 hp 208 volt 3 phase motor draw?

read the name plate on the motor


What voltage should 208 3 phase leads read?

From line-to-line (any two of the three leads) voltage or 'line voltage', the voltage is 208 V. The line-to-neutral (one of the three leads and the neutral conductor), or 'phase voltage', is 120 V.


How do I determine how many amps I need for a 3PH 10HP motor with 208 voltage?

First and foremost is the information the manufacturer puts on the nameplate of the motor. Second, the generic amperage can be found on motor charts that are on the Internet. Third you can use a formula to find the approximate amperage. HP = Amps x Volts x 1.73 x pf/746. Transposed for Amperage, Amps = HP x 746/Volts x 1.73 x pf. Use pf = .9 Amps = 10 x 746/ 208 x 1.73 x .9 = 7460/323.85 = 23.03 amps. See how much easier it is to read the nameplate.


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Ammeters read amps in a circuit. hope this helps


How do connect a wye connection for 12 leads out motor?

Normally there are six terminals (two terminals per winding in 3 phase system) for a motor. If you find 12 terminals, you need to read the motor name details or specifications to get more info. The motor could be with two different sets of winding (double speed motor)


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Read the tag on the condenser, it will be noted as LRA. Be sure to check the LRA for the fan as well and add them together for the total. If it is not listed on the tag it will certainly be listed seperately on both the compressor and the fan motor. LRA = Locked Rotor Amps.


What is the farmula to calculet full load current in three phase system?

This might help you. First and foremost is the information the manufacturer puts on the nameplate of the motor. Second, the generic amperage can be found on motor charts that are on the Internet. Third you can use a formula to find the approximate amperage. HP = Amps x Volts x 1.73 x pf/746. Transposed for Amperage, Amps = HP x 746/Volts x 1.73 x pf. Use power factor = .9 For estimating a 10 HP motor running on 208 volts. Amps = 10 x 746/ 208 x 1.73 x .9 = 7460/323.85 = 23.03 amps. See how much easier it is to read the nameplate.


What should a bad motor read in ohms if it is bad?

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.