Question 13040 of 844 · Washington 01 Journey Level Electrician Exam
A 240 volt single-phase load draws 50 A through 6 AWG copper (26,240 circular mils) that is 200 feet long one way. What voltage is available at the load?
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 13040
- D: 230.2 V
Explanation
VD = 2 x 12.9 x 50 x 200 / 26,240 = 9.83 V, so the load sees 240 minus 9.83 = 230.2 V. Adding the drop instead of subtracting gives 249.8 V.
More questions: Electrical Calculations
- 13041On a single-phase circuit, the length of the run is doubled and the load current is cut in half, with the same conductor. What happens to the voltage drop?
- 13042What voltage corresponds to a 3 % voltage drop on a 208 volt branch circuit?
- 13043In the common voltage drop formula VD = 2KIL / CM, what K value is normally used for aluminum conductors?
- 13044A three-phase 208 volt circuit of 10 AWG copper (10,380 circular mils) supplies 25 A per phase at 120 feet one way. What is the percent voltage drop?
- 13045A 120 volt, 20 A load is 150 feet from the panel. What is the smallest copper conductor that keeps voltage drop at or below 3 %?
- 13046What is the allowable ampacity of 6 AWG THHN copper (90 °C column) with three current-carrying conductors in a raceway at an ambient temperature of 40 °C?