how do you wire a three phase motor?

Answer 1

On the motor, usually inside the cover where the wires are to be connected ( the peckerhead ) there should be a diagram showing which wires get connected together. If it is a dual voltage motor it will show high/ low. It may also give wiring for "y" and "delta" Which to choose depends on what type of controls you are useing. Do you have a starter or not.
Next you need to know which direction it will turn with ABC phaseing. If it is not the direction you want you just swap any two phases.
For instance, your motor will turn clockwise with ABC but you want counter clockwise. Just put the B phase on wire 1 and the A phase on wire 2..

Answer 2

Well there is basically four wire Red,White and Blue that are the live wire or active on a the terminal block of the motor then the fourth wire is the earth that is connected to the chassis.
Then by turning the power on for just one second you will see the direction on the motor spinning. If this is not correct the just swap any TWO WIRE around eg red with white or blue with white to correct this.
Please be careful and always obseve the direction of travel of the motor. Usually the motor has an arrow pointing the correct direction of rotation.

Answer 3

One motor lead to each phase. If it runs backwards, swap any two wires. A motor controller and overloads would be nice too. Check out article 430 in the NEC for more requirements.

Answer 4

The 3 phases

3 Phase Wiring

To Buy Phase Converters
We Recommend ACE Brand.
Call 1-800-967-7217
Web Link: Phase Converters

3 Phase Electrical Circuit Wiring and Color Codes
The 3 phases are typically indicated visually in electrical diagrams by colors. The standards for these colors vary by country. See the 3 phase wiring color code table for details.
Conductors of a 3 phase system are usually marked by color code, to allow for balanced loading and to assure the correct phase rotation for 3 phase induction motors. Colors used vary widely and may adhere to old standards or to no standard at all, and sometimes vary even within an installation. However, the current National Electrical Code (2005) does not require color identification of conductors other than that of the neutral (white or white with a color stripe), the ground (green or green with a yellow stripe), or in the case of a High Leg Delta system, the High Leg must be identified with orange. See the chart below for color coding by country.


3 Phase Power Wave Form
One voltage cycle of a three-phase system, labeled 0 to 360° ( 2 π radians) along the time axis. The plotted line represents the variation of instantaneous voltage (or current) with respect to time. This cycle will repeat 50 or 60 times per second, depending on the power system frequency. The colors of the lines represent the American color code for three-phase. That is black=VL1 red=VL2 blue=VL3

Answer 5

I agree with "if you have to ask here, call an electrician". Also, the facility needs to have 3-phase electricity available; I've never seen a home that does.

Answer 6

if you have to ask on here you had better call an electrician,

Answer 7

??