Color Code Your Wires

Which cable is the positive lead? If you are a car enthusiast fixing or experimenting with rewiring your car, you need to take precautions. Make sure and mark the positive cable with a red piece of heat shrink tubing. Heat shrink tubing is also available in yellow and green stripes for ground lines. Moreover, good heat shrink tubing can add protection to your cables against chemicals and extreme temperatures, as well as abrasion.

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