Question 2050 of 749 · Maryland Journeyperson Electrician Exam
A service drop cable with a bare messenger operates at 120/240 volts. What is the minimum clearance above a sidewalk accessible only to pedestrians?
Exactly one answer is correct.
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Correct answer to question 2050
- C: 10 ft
Explanation
A 10 ft clearance is permitted above finished grade, sidewalks and pedestrian-only platforms where the voltage does not exceed 150 volts to ground and the conductors are cabled together with a grounded bare messenger. A 120/240 volt system is 120 volts to ground. See 230.24(B).
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