# Ampacity For 182mm 2

By | August 14, 2023

## Ampacity for 182mm2

Ampacity is the maximum current that an electrical conductor can carry without overheating. It is expressed in amperes (A). The ampacity of a conductor depends on its material, cross-sectional area, and temperature. The ampacity of a conductor is determined by the following factors: *

### Material:

The ampacity of a conductor is inversely proportional to its resistivity. This means that conductors with a low resistivity, such as copper, can carry more current than conductors with a high resistivity, such as aluminum. *

### Cross-sectional area:

The ampacity of a conductor is directly proportional to its cross-sectional area. This means that conductors with a larger cross-sectional area can carry more current than conductors with a smaller cross-sectional area. *

### Temperature:

The ampacity of a conductor decreases as the temperature increases. This is because the resistance of a conductor increases as the temperature increases. The ampacity of a conductor is typically specified in a table or chart. The table below shows the ampacity of a 182mm2 copper conductor at various temperatures. | Temperature (°C) | Ampacity (A) | |---|---| | 20 | 136 | | 30 | 129 | | 40 | 122 | | 50 | 115 | | 60 | 108 | | 70 | 101 | | 80 | 94 | | 90 | 87 | | 100 | 80 | The ampacity of a conductor can be increased by using a conductor with a larger cross-sectional area or by using a conductor made of a material with a lower resistivity. ## How to Calculate Ampacity The ampacity of a conductor can be calculated using the following formula: ``` I = k * A * √T ``` where: *

### I

is the ampacity in amperes *

### k

is a constant that depends on the material of the conductor *

### A

is the cross-sectional area of the conductor in square millimeters *

### T

is the temperature in degrees Celsius The value of k for copper conductors is 115. The value of k for aluminum conductors is 101. For example, the ampacity of a 182mm2 copper conductor at 20°C is: ``` I = 115 * 182 * √20 = 136 A ``` ## Safety It is important to ensure that the ampacity of a conductor is not exceeded. If the ampacity of a conductor is exceeded, the conductor will overheat and may cause a fire. To avoid exceeding the ampacity of a conductor, you should: * Use a conductor with a large enough cross-sectional area for the current that will be flowing through it. * Use a conductor made of a material with a low resistivity. * Keep the conductor cool by providing adequate ventilation. ## Conclusion The ampacity of a conductor is an important factor to consider when designing electrical systems. By understanding the factors that affect ampacity, you can ensure that your electrical systems are safe and reliable.

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