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The original was posted on /r/electricians by /u/Overexposed13 on 2024-01-18 23:26:40+00:00.
My journeyman couldn't answer this question, so I was hoping to get some information here.
Today I replaced an LED fixture that wasn't working, and my journeyman let me dissect it afterwards as we had some spare time. All the wiring looked fine, but LEDs were clearly burnt out and it was all wet inside. While testing it to see if replacing the LEDs would fix it, we found that the load side of the drivers were putting out about 330V AC, as opposed to the very low voltage DC that we were expecting to see. The light is good for 120V-277V but was hooked up to 120V before we took it down. Tested it using a 120V plug.
Is it actually supposed to send 330V AC to the LEDs, and we both just misunderstood how these lights function inside? If not, what's going on?