The voltage should be measured when the transformer is energized, to ensure that the connections are correct before the ________ is connected to the transformer.

• A. Arrestor
• B. Load
• C. Line
• D. Cutout

Answer: (B)

Verifying the connections by measuring the voltage while the transformer is energized is all about confirming the secondary wiring is correct and the voltage ratio and polarity are as expected before the load is connected. This check catches miswirings, incorrect tap settings, or phase/polarity errors that could damage the load or cause a fault once it’s connected. The other items mentioned are protective or supply-side components (surge protection, disconnects, or the line feeding the transformer) and aren’t what you verify for proper load readiness. So, you measure the energized transformer output first to ensure the load can be safely connected.