What voltage is used to power large motors?
A) 120 V
B) 240 V
C) 480 V
D) 4,160 V
Answer: D
Explanation: A) Incorrect. The power can be stepped down once to somewhere between 120 V and 240 V for use with air conditioning, heating, lighting, and other applications.
B) Incorrect. The power can be stepped down once to somewhere between 120 V and 240 V for use with air conditioning, heating, lighting, and other applications.
C) Incorrect. AC power is stepped down to 480 V (sometimes referred to as 440 V), which is a common motor voltage used around a plant.
D) Correct. When AC power reaches a unit, it is stepped down to 4,160 V for use with large motors.
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