- Shabbat and Holidays
- Halachot of Yom Tov
Adding water to an electric urn on Yom Tov, isn’t it possible that by adding water you will cause a light to go on or off? Wouldn’t this be prohibited?
Quite correct, I was assuming the only effect of adding the water was that the water would become hot. This is true of my urn, maybe not others. One may also boil water on a fire and then add to urn.