Question 1049 of 749 · Maryland Journeyperson Electrician Exam
On a 240/120-volt three-phase, four-wire delta system with a center-tapped winding, the high leg measures approximately how many volts to the neutral?
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 1049
- A: 208 volts
Explanation
Two phases measure 120 V to the center-tap neutral, but the third (high or wild) leg measures about 208 V to neutral. It must be identified so it is not used for 120-volt loads.
More questions: Definitions, Theory and Plans
- 1050On a balanced three-phase, four-wire wye system serving only linear resistive loads, the neutral current is:
- 1051On a wye system serving many computers and LED drivers, which harmonics add together in the neutral instead of canceling?
- 1052Which expression gives the true power of a balanced three-phase load?
- 1053How is the rotation of a three-phase induction motor reversed?
- 1054What is the synchronous speed of a 4-pole induction motor on a 60 Hz supply?
- 1055The difference between the synchronous speed of the rotating field and the actual rotor speed of an induction motor is called: