Question 13074 of 749 · Maryland Journeyperson Electrician Exam
What is the maximum fill percentage for a raceway that contains three or more conductors, other than a short nipple?
Exactly one answer is correct.
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Correct answer to question 13074
- B: 40 %
Explanation
Chapter 9 Table 1 allows 40 % fill for over 2 conductors. 53 % is for one conductor, 31 % is for two conductors and 60 % is for nipples 24 inches or shorter.
More questions: Electrical Calculations
- 13075What maximum fill percentage applies when exactly two conductors are installed in a raceway?
- 13076A raceway nipple not exceeding 24 inches long between enclosures may be filled to what percentage?
- 13077Using a 40 % fill area of 0.213 sq in for 3/4 inch EMT and an area of 0.0133 sq in for 12 AWG THHN, how many 12 AWG THHN conductors are permitted?
- 13078How many 10 AWG THHN conductors (0.0211 sq in each) may be installed in 1/2 inch EMT, which has a 40 % fill area of 0.122 sq in?
- 13079Three 4 AWG THHN (0.0824 sq in each) and one 8 AWG THHN (0.0366 sq in) are to be installed in EMT. Which is the smallest trade size permitted? (40 % areas: 3/4 in 0.213, 1 in 0.346, 1-1/4 in 0.598 sq in)
- 13080What is the total cross-sectional area of six 10 AWG THHN (0.0211 sq in each) and three 8 AWG THHN (0.0366 sq in each) conductors?