Re: Do LED retrofit inserts change IC rating?
One of the factors that makes a recessed fixture IC-rated is airtightness. A non-IC fixture can will allow air to escape from conditioned space to unconditioned space. Once you bury a non-IC fixture can in insulation, it's nearly impossible to make it airtight. The aforementioned fixture boxes provide the necessary airtightness where non-IC fixture cans are installed in unconditioned space.
Another factor is the temperature rating of the socket and insulation on the wires must be high enough to withstand the higher temperatures experienced by IC-rated cans.
The retrofit kits may make it effectively airtight, or may reduce the internal temperatures to a safe level, but that's not enough. From a testing lab's perspective, a light converted with an LED kit may at some point be reverted back to an incandescent lamp, so they are unlikely to list any conversion as making a non-IC fixture IC-rated unless the retrofit permanently changes the fixture so it can be reverted. Since that would be a modification of the original manufacturer's design, that raises the barrier to listing even higher.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.