When it comes to jumping a car, you want to make sure that you use the correct gauge wire. The best choice for most vehicles is 10-gauge wire. This type of wire has an amperage rating of up to 30 amps and can handle the current draw from the battery with ease. Using this type of wire ensures that your jumper cables stay cool while in use, which increases their lifespan and reduces any potential damage or risk due to overheating. Additionally, 10-gauge wires are constructed with thicker insulation than other gauges, making them more durable and less likely to short out when used in wet conditions. It’s important to note that if your vehicle has a higher amp draw (such as diesel engines), then 12-gauge wires may be necessary instead. Ultimately, choosing the right gauge for your needs will ensure that jumping a car is safe and effective each time!