When performing a megger test on a motor, you typically select the voltage scale on the megger that most closely matches the namplate voltage.

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The voltage you choose on a megger test is determined by the insulation’s rated withstand voltage and the test procedure, not by the motor’s namplate operating voltage. The namplate shows how the motor runs, but the insulation test is about stressing the winding insulation safely to reveal leaks or degradation. Selecting a scale that matches the namplate voltage would not reliably test the insulation and could ignore potential weaknesses or, if pushed too high, risk damage. In practice, you pick a test voltage appropriate to the insulation class and the equipment, often higher than the operating voltage but within the insulation’s safe limits and per manufacturer or standards guidelines. That’s why the statement is not correct.