Question 8069 of 931 · Texas Journeyman Electrician Exam
A 150 kVA dry-type transformer rated over 112.5 kVA is installed indoors. Generally, where must it be installed?
Exactly one answer is correct.
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Correct answer to question 8069
- A: In a transformer room of fire-resistant construction
Explanation
Section 450.21(B) requires indoor dry-type transformers over 112.5 kVA to be installed in a transformer room of fire-resistant construction, with exceptions such as transformers with high-temperature insulation separated by barriers or distance.
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