1, first of all to know the resistivity: copper wire resistivity refers to the resistance of copper wire at room temperature (20 ° C) with a length of 1 m and a cross-sectional area of 1 mm 2 , generally 0.0178 Ω / m. n square millimeter wire is n * 0.0178 Ω / m; 2, 1 mm 2 wire diameter, 1 m copper wire pressure drop: v = 1 m * 0.018 Ω / m * 1 A = 0.018 v, here according to charging The line of 1 meter is almost the same; as for the line diameter, the good is at least 0.75 square.

Scott Wood- August 9, 2018|

+2Votes

To calculate the voltage drop, you need to know the wire resistance and the current through the wire. The product they multiply is the voltage drop of the data line.

+8

Votes1, first of all to know the resistivity: copper wire resistivity refers to the resistance of copper wire at room temperature (20 ° C) with a length of 1 m and a cross-sectional area of 1 mm 2 , generally 0.0178 Ω / m. n square millimeter wire is n * 0.0178 Ω / m;

2, 1 mm 2 wire diameter, 1 m copper wire pressure drop: v = 1 m * 0.018 Ω / m * 1 A = 0.018 v, here according to charging The line of 1 meter is almost the same; as for the line diameter, the good is at least 0.75 square.

Scott Wood- August 9, 2018 |

+2

VotesTo calculate the voltage drop, you need to know the wire resistance and the current through the wire. The product they multiply is the voltage drop of the data line.

Ryan- August 10, 2018 |

+2

VotesThe voltage drop across the data line is 0.1V,

Jeffrey Adams- August 10, 2018 |