Why are LED lights required to be ICT?
410.116 talks about the housing needing to be ic rated, not the type of lamp installed.
Per 410.116(B) any recessed enclosure, ballast, LED driver, etc...must be IC rated if there's insulation around it.
Also if you can get ahold of a 2014 "handbook" there is a blue note at the end of 410.116(B) that states:
"LED luminaries for installation in contact with thermal insulation must be identified as Type IC, which is similar to the requirements for other luminaries"
Any recessed cans that will touch insulation need to be ic rated. What if the customer was to change out the LED trims back to incandescent and put 100w lamps in? (Why, I don't know). This will generate a ton more heat so the housing still needs to be rated for IC.
On another note thermal protection is required to protect lamps, not housings (410.115(C)) unless the lamp is listed and identified as providing equivalent protection. (Exception 2) Some LED lamps come with fins to dissipate and allow for thermal protection.
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