So, I'm installing a small point-of-use electric water heater, just a single 1K watt element - good old 8.3 amps. In theory you could run 14/2 but I ran 12/2 for good form on a water heater.
Then someone notices a sticker on the unit "Danger of fire. Use only 10-guage wire." and they're unhappy.
I'm guessing the factory has a pile of these stickers for the regular units and they didn't bother making special stickers for the small units.