What is the appropriate cross-sectional area for car battery jumper cables?

[VanPaislee]

Car battery jumper cables are generally 16 square millimeters or 25 square millimeters. Here are the selection criteria for specific situations: 1. Vehicle type: For small cars, the national standard pure copper cable starts at 16 square millimeters. However, for large engineering vehicles, the national standard pure copper cable of 25 square millimeters is recommended. If the value is lower than the recommended standard, it will be difficult to jump-start the engine. 2. Current impact: With constant power and voltage, the thicker the cable, the lower the resistance, resulting in more current being transmitted to the motor. It is advisable to use thicker cables or bundle two thinner cables together. Unless otherwise specified, the standard is usually 16 square millimeters of copper wire, while special cases require 25 square millimeters of copper wire.