NCTI Fiber Installation & Activation 2025 – 400 Free Practice Questions to Pass the Exam

Using -48 VDC with a positive ground in telecommunications plays a crucial role in mitigating electrolytic corrosion, especially on outside plant installations. This configuration effectively minimizes the potential differences between the equipment and the surrounding infrastructure, which helps in reducing the risk of corrosion that can occur due to Electrolytic Corrosion.

When the telecommunications equipment is connected in this manner, the negative voltage is supplied to the equipment and the ground is at a positive potential. This setup creates a more stable electrical environment and helps prevent unwanted electrochemical reactions that lead to the deterioration of metal components exposed to moisture and other environmental factors.

Other answer choices touch on different benefits of voltage systems, but they do not specifically address the unique corrosion mitigation advantage that a -48 VDC with positive ground system provides for telecommunications equipment, particularly in outdoor or harsh environments.