A pad-mounted transformer's primary source of feed is an ____________.

• A. Underground conductor
• B. Overhead conductor
• C. Aerial cable
• D. Submarine line

Answer: (A)

Pad-mounted transformers are fed from underground distribution feeders. This arrangement places the transformer at ground level and connects it to buried medium‑voltage lines, which keeps high‑voltage equipment out of sight and reduces safety hazards in urban areas. An overhead conductor would feed a different type of installation, such as a pole‑mounted transformer, not the pad-mounted unit. Aerial cables and submarine lines aren’t typical primary feeds for a pad‑mounted transformer in land-based distribution.