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I’ve tried to figure this out, but the references I’ve checked don’t provide a clear answer.
I have a non-adjustable hotplate (TechYid Shabbos Safe Hotplate).
It’s supposedly ok to place cold, fully cooked food on the hotplate on Shabbos for reheating.
But heating liquids is apparently considered to be “cooking” them.
Questions:
1. Can I place a kettle of cold water on the hotplate during Shabbos?
2. Can I place a kettle of cold water on the hotplate five minutes before the onset of Shabbos?
Can’t you ask a Rov?
1. Can I place a kettle of cold water on the hotplate during Shabbos? NO it it reaches a temperature of 110 degrees F (or 43 degrees C yad sokedes bo) according to R’ Moshe. That is considered cooking. Others are even more stringent and consider a lower temperature as “Yad soledes bo.
2. Can I place a kettle of cold water on the hotplate five minutes before the onset of Shabbos? This is an “it depends”. Five minutes before candle lighting means that it will warm up for 23 minutes before sundown (shkia). If it reaches 110 degrees F during that time it may be ok. However, you would not be allowed to pour off any water during these 23 minutes. Better to put it on with enough time to reach 110 degrees (or higher) before candle lighting. Or boil it on the stove before this time and put it on the hotplate 5 minutes before candle lighting so it will remain hot.
1. No
2. No (See Ig”M OC 4:74 #23 where he discusses a hot water urn which like your hot plate doesnt have any adjustable knobs, nonetheless the water has to be “hot” prior to Shabbos He defines “hot” earlier in that teshuva as 160 degrees It wont get to 160 degrees on a hotplate in the 5 minutes before shabbos )See Shulchan Aruch O”CH 318:14 and 254:9 MB sk 51
You might need some siman for a היכר not to change the setting.
I’m confused. Why are you allowed to put cold food on it?
laskern: I looked up Rabbi Ribiat’s sefer after posting this morning and found what you wrote in Rabbi Ribiat’s sefer (Vol 2 Page 558). He writes: “Although heating liquid to 110 degrees Fahrenheit (43.3 degrees Celsius) is Bishul this does not mean the bishul process was completed in the liquid. Heating the liquid further may still constitute the Melocho of Bishul. To be permitted to heat (or reheat) a liquid, it must have reached a minimum temperature of 160 degrees F / 71.1 degrees C while in a kli rishon.” I know that a poseik in my neighborhood does allow one to heat water on the blech late on erev shabbos as long as it reaches 160 by shkia.
I’m confused. Why are you allowed to put cold food on it?
אין בישול אחר בישול בדבר יבש
The second issue would be מיחזי כמבשל, but some poskim are meikil when there’s no way of adjusting the heat level.
(which would presumably also take care of שמא יחתה בגחלים).
Not all poskim agree to allow it, though.
DY, What about unplugging?
Unplugging what?
The hotplate.
DovidBT, I think 3) since you didn’t contribute to the extinguishing of the fire, it is ok and you can eat it on Shabbos.
4) Shulchan Aruch 318:4 says if soup is in it , there is cooking after cooking.laskern
Are chazal concerned with “shema yechabeh” or is tat your own concern?3, same answer as above. The water can’t be used if it was recooked on Shabbos.
4, only something that’s completely dry can be reheated on Shabbos. Once liquid is involved, you can’t reheat it on Shabbos.
The concept that “it’s impossible to cook something that’s already cooked” (which allows for reheating completely dry cooked Foods) only applies to something that’s completely dry.
As always, confirm with a LOR
ubi, The hot plate is dangerous leaving it on. It needs to be put on a shabbos clock.
laskern: I am not sure that the answer to the electrical outage question is that simple. Although the person didn’t do anything, the water itself (if it totally cooled) is still being cooked on shabbos. I am not sure if it will be then considered like the Chamei Teveryah.
The reason you cannot eat is a knas, penalty but if he didn’t do anything wrong, why should he be penalized?
The hotplate.
No, you are not allowed to unplug a hotplate on Shabbos.
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