# 3 Phase Motor Wire Size Chart

By | May 14, 2021

# Understanding the 3 Phase Motor Wire Size Chart

For any electric motor, there is a necessary requirement to match the size of the wire to the voltage and current requirements of the motor. A 3 phase motor wire size chart can be used to calculate the appropriate size of wire that should be used in order to ensure a safe electrical connection. It is important that the correct size of wire is selected for a 3 phase motor, otherwise it can cause problems such as overheating or premature motor failure. In this article, we will look at how to read a 3 phase motor wire size chart and understand the best wire sizes for different voltage and current requirements.

When selecting the correct size of wire for a 3 phase motor, the type of power used will affect the required wire size. The most common types are single-phase and three-phase systems. In a single-phase system, only one phase of voltage is present while in a three-phase system, three different phases of voltages are present. Each phase comprises of a positive, negative, and ground. Depending on the power requirements, each of these phases may have different wire sizes.

## Calculating Wire Size for Three-Phase Systems

In order to calculate the required wire size for a three-phase system, the current and voltage must be known. This information can usually be found on the motor nameplate. Once the voltage and current values are known, the 3 phase motor wire size chart can be used to determine the necessary wire size. The chart can be looked up online or it can be obtained from the manufacturer.

The 3 phase motor wire size chart lists the recommended wire sizes for specific current and voltage calculations. The chart is split into two columns, one is the voltage rating of the wire and the other is the current capacity of the wire. Generally, the higher the current, the larger the wire size should be. Additionally, the higher the voltage, the thicker the wire should be.

When looking up the appropriate wire gauge size, it is essential that the correct information is used. If incorrect information is used, it can lead to an issue with the 3 phase motor or even cause a fire. After finding the correct size of wire, the amps value can be calculated by dividing the wattage of the motor by the volts. This value needs to be compared to the listed current capacity for the wire size in order to ensure it can handle the amperage.

## Safety Considerations When Using 3 Phase Motors

It is always important to consider safety when dealing with any electricity related project. When wiring for a 3 phase motor, always select the highest gauge size of wire that meets the current and voltage requirements, as it will provide the most protection in case of overload.

It is also essential to always follow the instructions given by the manufacturer. If there are any amendments needed due to the specific application, they must be made in accordance with the relevant regulations. Additionally, all grounding information must be followed as it is essential to protect both the motor and operator.

## Conclusion

Choosing the right wire size for a 3 phase motor is an important step to ensure a safe electrical connection. This can be achieved by using a 3 phase motor wire size chart. By understanding the required current and voltage for the motor, the correct wire size can be determined from the chart. Additionally, safety considerations must always be taken into account when selecting a wire size fora 3 phase motor.

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