Equipment & SystemsQuestion 303 of 521
Thermal insulation must be kept at least how far from a non-Type IC recessed luminaire enclosure?
a.1/2 inch
b.1 inch
c.3 inches
d.6 inches
Explanation
Section 410.116(B) requires thermal insulation to be kept at least 3 inches from the enclosure of a non-Type IC recessed luminaire so heat is not trapped. Only a luminaire identified as Type IC may be in direct contact with insulation; the smaller clearances apply to combustible material spacing, not insulation.
Law Reference: 2023 NEC §410.116Practice all 521 questions free — no signup required.
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