Transformers are either pole-mounted or pad-mounted depending upon the ____.

• A. Circuit
• B. Voltage
• C. Load
• D. Location

Answer: (A)

Pole-mounted versus pad-mounted transformers are chosen based on whether the distribution circuit is overhead or underground. On overhead distribution, transformers are mounted on utility poles for easy access and exposure to air cooling, while underground circuits use pad-mounted transformers in sealed, ground-level enclosures on concrete pads to protect the equipment and keep it safe underground. The voltage or load can vary, and the exact location may influence installation, but the defining factor for the mounting method is the circuit type—overhead versus underground.