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Electric heating cable embedded in plaster, or “sandwiched” between layers of dry wall creates heat. Therefore, any nonmetallic-sheathed cable run above these ceilings and buried in insulation must have its current-carrying capacity derated according to _____ correction factors found in Table 310.15(B)(2)(a) of the NEC.

A. 40 Celsius
B. 50 Celsius
C. 60 Celsius
D. 70 Celsius

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