Askarel-containing transformers, rated in excess of 25 kVA, shall have ____.
A) negative airflow to all adjacent areas within a scope of 10 ft.
B) insulated grounding wires connecting the transformer case and an earth ground
C) at least 6 in. of airspace between the transformer case and any adjacent combustible material
D) a properly installed chimney
Correct Answer:
Verified
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