NEC 2026 Compatible
An oil-insulated transformer with a rating of 750 kVA is installed outdoors, adjacent to a building. The building wall is constructed of noncombustible materials. According to NEC 2026, what is the minimum horizontal separation required between the transformer and the building wall if no fire-resistant barrier is provided?
Journeyman Level📋 NEC 450.23(A) and Table 450.23(A)Transformers
A
5 feet
B
10 feet
C
15 feet
D
20 feet
Explanation & Direct Citation
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