What is the primary purpose of using grommets when passing wires through bulkheads?

The primary purpose of using grommets when passing wires through bulkheads is to prevent chafing of wires. Grommets serve as protective sleeves that shield the wires from sharp edges and surfaces in the bulkhead, which can cause wear and tear over time. When wires come into contact with rough or abrasive materials, they can become damaged, leading to insulation breakdown and potential short circuits. By using grommets, technicians ensure that the integrity of the wire insulation is maintained, reducing the risk of electrical failures and enhancing safety in the RV system. This protective feature is particularly important in environments like RVs, where movement and vibrations are common, and maintaining the electrical system's reliability is crucial.