METRA The Install Bay Fishman PWOR18500 18-Gauge Orange Primary Wire 500 ft Coil car electronics accessory

18-Gauge Orange Primary Wire for Vehicle Wiring

This 500 ft coil of 18-gauge orange primary wire is intended for automotive electrical installations. It suits installers and hobbyists running low-voltage circuits such as lighting, accessories or sensor leads throughout a vehicle. The continuous length allows long runs without splicing. The orange insulation provides clear colour coding for circuit identification.

Practical Limits of 18-Gauge Primary Wire

Eighteen-gauge conductors carry less current than heavier gauges, so they are unsuitable for high-draw devices such as amplifiers or winches. Voltage drop becomes noticeable on very long runs, limiting effective circuit length. The insulation is rated for standard automotive environments but not for continuous exposure to extreme heat or harsh chemicals. Buyers needing higher current capacity or more rugged jacketing should select a larger gauge or specialised cable.