Question 8068 of 749 · Maryland Journeyperson Electrician Exam
A 75 kVA dry-type transformer is installed indoors. What is the minimum separation from combustible material without a fire-resistant barrier?
Exactly one answer is correct.
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Correct answer to question 8068
- D: 12 in
Explanation
Section 450.21(A) requires dry-type transformers of 112.5 kVA or less installed indoors to have at least 12 in of separation from combustible material, unless a fire-resistant, heat-insulating barrier is used. Transformers of 1000 volts or less that are completely enclosed are exempt.
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