Red Seal Electrician Practice
MotorsQuestion 354 of 1506

Unbalanced phases or undervoltage can have which effect on a motor's current draw?

  1. Current deviation from the nameplate value
  2. No effect at all on the motor current
  3. A lower current in every case
  4. A permanent drop of the current to zero
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Correct answer: Current deviation from the nameplate value

The nameplate current is for a fully loaded motor on proper voltage.

Source: Troubleshooting Motors and Controls (Dickson-Self), 6.1: Testing Motor Components

Practice motors

Questions last reviewed: 18 October 2026