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The table will vary from edition to edition. In the 2005 NEC, it is table 430.250. Note that these are only typical values, and will vary from motor to motor.
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Is there any way to get a 3-phase motored 15hp 120 gal compressor to work on any kind of residential hookup?
If the motor voltage is 240 you can hook 240 to any two motor leads then put a switch and a capasitor in series from one leg to the other motor lead.once motor starts open switch,the motor will be rated at 58% about 8.7 hp.Another way to do this is if you have another 3 phase motor the same size or larger ,hookup 240 to extra motor any two leads hook leads from motor to air comp start contactor.Turn shaft on extra by hand it will srart which will make a third leg "3 phase" I know this is working on a three phase wheel balencer for the last 8 years i don't believe i would want to "hand spin" a motor on a compressor... a bit hazardous! another factor here is the direction of rotation as most compressors are sensitive to this. the starting current on a motor of this size and the service it is in quite large, the best bet would be to find a replacement single phase (220V.) motor (matching rotation, speed and starting torque). one could always use a rotary phase converter, but this is a spendy and involved way to do the job.
What type of motor is used in a ceiling fan?
Single-phase motors - These motors are commonly fractional-horsepower types, though integral sizes are generally available to 10 hp. The most common single phase motor types are shaded pole, split phase, capacitorstart, and permanent split capacitor.Figure 5 - Rings in shaded-pole motor distort alternating field sufficiently to cause rotation.Figure 6 - Split-phase windings in a twopole motor. Starting winding and running winding are 90 ° apart.Figure 7 - Split-phase start induction motor.
What moon phase are you likely to see in 14 days?
you would probably find a different type of moon phase depending on witch day it was.
How can find out the terminal sequence of a three phase induction motor?
If you are concern about the rotation of the 3 phase motor, all you have to do is connect the power to the three terminal wires, make sure connections are tight, insulate one of the connections properly, the other two just put enough wrap insulation to prevent shortening of the power phases. Bump the motor, that is start it and quickly shut the power of, this way you can check for rotation, if motor is turning in the proper direction, proceed with a thorough insulation of the remaining two connections. If the motor is not turning in the proper direction, switch the connections that were no thoroughly taped, bump motor again it should have changed direction, proceed with taping up the connections.If there is a chance of damaging equipment connected to the motor by bumping it or a panel that has multiply motors connected to it there is a phase sequence meter that can be used to check proper phase sequence. On three phase service rebuilds this meter works great. Get the phasing right at the CDP and all or the motors that are connected to it will be in the right rotation.See related links below
If you had 1000 cells and most of them have divided - in what phase would you call them after the division?
After they divide, you would find most in interphase, which is probably the answer you are looking for.
You have one hp three phase motor where as available power supply is only single phase how can you run this motor?
You will need to install a phase converter or change the motor to single phase. You can find a licensed electrician at www.contraxtor.com
How do you find out the date a 3 phase electric motor was made by Westinghouse?
i have no clue, why the fu** would anyone know this.
How do you convert a 0.37kw 4 pole 3 phase motor to single phase?
The motor cannot be altered to work on single phase power. You will either have to put in a new single phase motor or use a phase convertor box. Do a google search for phase convertor - you will find plenty.
Where would you find a forward and reverse wiring diagram for a 1 phase 230 volt electric motor?
Go to the website of a motor starter manufacture, such as 'Square D'.
What single phase motor should you use to get out the same power as a 3 phase one and a half HP motor It's going on a lathe and I don't want to find that a singel phase one and a half motor labors?
One And a Half Horse Power Obviously.
Can a 380volt's 3 phase motor can be converted to 230volt's three phase motor?
Only if you want to damage it. "277" Volt 3-phase will usually mean 277 from each phase to neutral, and 480 from phase to phase. By "230 3-phase", you likely mean 120 phase-to-neutral, and 208 phase-to-phase. If you really mean 230, then you are probably NOT talking about a three phase motor.
What should you do if a three phase motor or compressor is not rotating in the correct direction?
If your three phase motor runs backward, you have two phases swapped. double check a, b and c phase to find which ones are misplaced.
How do you convert or rewire a 3 phase motor to a single phase?
Of course, but it will change all parameters (HP, torque etc.) The problem is someone would have to redesign of that motor, size of coils in field winding according to new voltage, speed and HP ratings. Basically, is not worth it.
How can you find motor FLA without the motor nameplate The motor is single phase 120 vac?
use clamp on amp meter
What are the disadvantages of a three phase induction motor?
The primary disadvantage of the three phase induction motor is that speed control is a challenge. But new technology in the form of VFDs (variable speed drives) is now rectifying this situation very effectively. Another disadvantage is that single phase power is common while three phase power is less commonly available.
How much is the amps to run a three phase motor?
To find the amperage of a three phase motor, the following equation needs to be used. Amps = HP x 746/1.73 x Volts x % efficiency x power factor. once all of the values are added you can find the amperage of any Horsepower motor at any three phase voltage. A standard motor's efficiency between 5 to 100 HP is .84 to .91. A standard motor's power factor between 10 to 100 HP is .86 to .92.
Can a 3 phase motor be wired to run in your house?
The physical internal windings between single phase and three phase motors makes this an impossibility That being said money can make anything happen. Depending on the amount of money you want to spend to make this happen there is a device on the market called a VFD ( Variable Frequency Drive). On the three phase input terminals you apply your single phase voltage. On the output terminals you connect your three phase motor. When run in this configuration there is an internal switch that has to be changed to let the VFD know that it should be looking for only two lines on the input to be hot. Otherwise the VFD thinks that there is a line loss on the three phase input terminals and the unit will not start. You can make a phase converter with a couple extra motors. Wire up a 120V single phase motor and couple it to a 3 phase motor. This turns the 3 phase motor into a generator for you to run to whatever equipment the 3 phase motor is. Although if you had a single phase motor you probable don't need a 3 phase motor. == == yes! you will have to buy a phase converter. yes, it is possible to this with a rotary phase converter . one manufacturer is "phase master" (as an example only, not wishing to promote any brand). these are not cheap units and it may be more cost effective to purchase a single phase (220V.) replacement motor . the overall efficiency (operational costs) would be better too . a rotary phase converter is usually the "last choice on the list" .
