Questions tagged [electricity]

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10
votes
1answer
479 views

Tweeting on Shabbat: d'oraita or d'rabbanan violation?

There was a dangerous situation in my community on Shabbat and I knew (from the amount my house phone was ringing and my cell phone was buzzing) that people I knew across the world would be concerned ...
13
votes
1answer
147 views

Can a “brain controlled” prosthetic be used on Shabbat?

New prosthetics are controlled by brain waves which seem to make the prosthetic an extension of the body in an "organic" way, in that we control all of our own limbs through the same brain waves and ...
2
votes
1answer
180 views

Amirat goy on Shabbat in regards to electricity

Since many poskim hold that not using electricty on Shabbat is just a Minhag (Rav SZ. Aurbech), would they hold that it is 100% ok to ask a non-Jew to do things with electricity for you?
0
votes
1answer
67 views

Source for electricity in the times of the Talmud?

Many years ago I was told a story about an Amorah (Talmudic sage) who had an electric lamp, and when discovered said something along the lines of, the world isn't ready for this yet. I'm looking for ...
4
votes
1answer
103 views

Shutting lights off during Chol Ha'moed, to save electricity

Preface During Shabbat, Orthodox Jewish practice is to avoid turning lights on or off. Perhaps turning lights on or off is a form of melacha. On Chol Ha'moed, melacha is sometimes, but not always, ...
0
votes
0answers
66 views

Source that Power generators on Shabbos override Shlom Bayt (in Israel)

Power generators are very popular with Haredim in Israel that traditionally don't rely on Isral Electric Company's electricity on Shabbos. On Rosh Hashana, the power generator of a famous Yeshiva in ...
6
votes
0answers
55 views

Why is turning on a faucet not considered molid or boneh?

As has been discussed in many questions on this site, halachic authorities generally agree that the use of electricity is prohibited on Shabbat, but some differ in their analysis of why. (There is ...
2
votes
1answer
87 views

Is it permitted to turn off a time switch on Shabbos?

On a time switch (timer), there are generally two options: one which will ignore the time switch and let the current flow, and one which activates the timer. In the case where the switch is on the ...
5
votes
0answers
56 views

Shabbat: Electric Apartment Door in Doorman Building

Let us say a person lives in an apartment building where the apartment doors (door to the apartment itself) are fitted with electronic locks. The building has a 24-hour "concierge" doorman (non-...
6
votes
1answer
136 views

On Shabbos, may someone turn off a switch of an electric-eye controlled light while the light is off?

If a room or an area has an electric eye which causes a light to turn on when someone passes by, and the light is off, may someone turn off the light-switch on Shabbos so that people can walk by ...
-1
votes
1answer
92 views

Dimmer Lights on Yom Tov

On Yom Tov, we are allowed to adjust fire (i.e. change the strength of the stove) so long as we do not completely turn the stove on or off. Therefore, if a room’s lighting has a dimmer switch, would ...
1
vote
1answer
85 views

Asking a non-Jew to turn off a light on Shabbat

If I would like to turn off a light on Shabbat can I ask a non-Jew to turn off the light since it's a shvut deshvut? (ie- electricity is a derabanan and amira lnochri is also shvut)
27
votes
3answers
4k views

Why can't electricity be manipulated on Shabbat?

Why can't we use and change electricity on Shabbat and YomTov? By this I mean why can't we turn lights on and off? I've heard Rabbis say that its because you can't complete a circuit on Shabbat, ...
6
votes
1answer
426 views

Use of an automatic toilet on Shabbos?

Can one use on Shabbos an automatic toilet with an electric sensor that triggers the flushing mechanism when you are done? For example in a hotel lobby, or a public building. Assume there is no other ...
7
votes
0answers
53 views

Difference between Halperin and Tzomet switches?

I am reading about the various so-called Grama and other Shabbat switches developed in Israel for use in hospitals and security situations. It seems that there was one solution created by Rabbi ...
5
votes
1answer
221 views

Reason for a Chanukah Minhag

Are there any authorities who suggest that the reason for the Minhag for women to avoid Melacha (creative work) while the Chanukah candles are lit is because we are worried they may come to use the ...
2
votes
2answers
69 views

Conductivity of living things and Shabbat

If electricity is banned on shabbat, how does a person deal with the problem of the body being a conductor? When I hold a person's hands, it creates a circuit. If I let go of their hands then I have ...
4
votes
1answer
222 views

Using modern electronic devices (refrigerators, air conditioners, digital water meters) on Shabbat

The Mishmereth Hashabbath institute in Israel has published a booklet which claims that using many modern electronic devices (refrigerators, air conditioners, digital water meters) are highly ...
1
vote
1answer
362 views

Being in a photo on Shabbos

If someone is taking a picture on Shabbos on their phone or a digital camera - must one try not to be in the picture; does he violate anything if he specifically “photo bombs” the pic on Shabbat? Does ...
3
votes
0answers
78 views

Light switch on Shabbat - no bulb, unplugging an extension cord

Muktza aside - Is it permissible on Shabbat to turn off a light switch if the light bulb burned out; Is there any issue in removing the current from the circuit 10, 15, 20 ft back? The same I would ...
11
votes
1answer
1k views

Can one run a surveillance Camera on Shabbos?

Is there any prohibition in having surveillance cameras operating on Shabbos? If not, why is is any different to filming a Bar-Mitzva, etc?
3
votes
2answers
214 views

Audio Recording on Shabbat/Yom Tov

Would there be a problem with leaving a recorder on from before Shabbat or Yom Tov, and thereby recording a lecture given on Shabbat itself? There is a wealth of literature on the subject of Melacha ...
4
votes
2answers
125 views

Who is worried about affecting a refrigerator's thermostat on shabbat?

When one opens a refrigerator door, there are two classes of effects: Immediate result - e.g. light going on, or in newer models a fan might start. This class of effects can normally be fairly ...
0
votes
2answers
5k views

Can we play video games during sabbath

I am not Jewish, but sort of try to emulate some parts of it to see if it does me any good. Well, not doing anything for 1 day is too boring. Actually what else can we do anyway during sabbath beside ...
4
votes
1answer
107 views

Adjusting Potentiometer on Yom Tov (eg. oven temperature)

Can someone point me in the direction of some Halachic sources to research the subject of potentiometers on Yom Tov? In the case of an oven, I had the understanding that as long as the fire was on ...
2
votes
2answers
56 views

Can one disconnect an emergency lamp from power on shabbat?

This is an emergency torch. It is plugged on power and, in case the electricity stops, turns itself on automatically and runs on batteries for hours If power falls on shabbat, can one disconnect ...
1
vote
0answers
111 views

Temperature controlled urn on Shabbat

What issues may be at play when adjusting the temperature of an urn on Shabbat, e.g. from 200° F to 80° F, specifically on an urn pictured below*? (Assuming the water is already pre-boiled before ...
2
votes
0answers
201 views

Sewer pump usage on Shabbat

There are sewer tanks where, when full, an electric sewer pump automatically turns on. Is it a problem to pour water down the drain (washing hands, flushing the toilet) into such a sewer system? ...
3
votes
0answers
163 views

Is a Digital Clock muktzeh on Shabbos?

This question occurred to me over Shabbos, when my clock fell over. What Muktzeh category does a digital alarm clock fall into? If it has a backup battery, does that change anything? Additionally, if ...
8
votes
3answers
2k views

Can you use electricity on Yom Tov

Yom Tov is slightly different than Shabbat. For example, on Shabbat one cannot cook, but one can cook on Yom Tov provided that it is from an existing flame. My question is this... Let's say I have ...
2
votes
0answers
348 views

Amazon's Alexa & Shabbos [duplicate]

Does anyone know of a definitive credible source about voice activated devices on Shabbat? Alexa has made life so much easier as my elderly mother can just use her voice to contact us. We have made ...
2
votes
1answer
155 views

Air purifier with LED sensor on Shabbat

Would one be allowed to use an air purifier with an LED smell indicator sensor on Shabbat if bringing in odors near the purifier with outside food or other odorous things could or most surely would ...
0
votes
0answers
30 views

What are the various views about electricity on Shabbos [duplicate]

This question discusses specifically R' Moshe's views on using electricity on Shabbos. What are some of the other major views out there (R' Shlomo Zalman, Tzitz Eliezer, etc.)? Believe it or not, ...
4
votes
1answer
391 views

Why isn't walking through a metal detector allowed on Shabbat because of pikuach nefesh?

I saw a few weeks ago that there are no security checks at the Kotel for religiously dressed Jews on Shabbat. This is to avoid having to walk through a metal detector, apparently. My question is, why ...
7
votes
1answer
534 views

Is one allowed to use electricity on Shabbos in Israel?

I have heard that some don't use electricity made by the Israeli Electric company on Shabbos and only use generators. However, I have seen people who do use public electricity on Shabbos. What are ...
30
votes
5answers
1k views

When blogging/emailing/etc., do I use “God” or “G-d”?

Is there a religious problem with typing out the name: "G-o-d"?
2
votes
1answer
81 views

Is a Highwire Eruv allowed?

Where can I found the discussion regarding the permissibility of using the hotwire/highwire (the electric wire which is all the way at the top of the utility pole) as part of the Eruv? Thanks The ...
16
votes
2answers
343 views

Netilas Yadayim with automatic sinks

It seems there is precedent to allow for netilas yadayim when you don't have a cup, by turning the sink on and off for each rivi'is per hand. By employing this method you satisfy the requirement of ...
2
votes
2answers
685 views

Electronic sliding doors on shabbat

What can a person who is staying at a hotel which has only electronic sliding doors that open when one walks near them do to avoid any issue on shabbat? Wait for someone else to enter and "piggyback"?...
6
votes
2answers
522 views

Kosher switch and Grama according to R. Belsky's letter

Yeshiva World News published a letter from Rabbi Belsky saying that the Kosher Switch accomplishes nothing and is simply a regular melacha. My question is basically the same as this commentor. Is ...
3
votes
1answer
157 views

Not using Electricity as a Minhag

This answer asserts that R' Auerbach held that not using electricity on Shabbat is a minhag. However, assuming that this ruling dates to the 1930s (which is what I have heard in the past), everyday ...
6
votes
1answer
838 views

Electronic card readers to enter buildings on Shabbat?

As a student, I've noticed that practically all of the dormitories in my university require residents to tap their student cards to a sensor before they are allowed to enter their building. (Moreover, ...
2
votes
1answer
778 views

Use induction on Yom Tov

May one use an induction stovetop on yom tov? I assume there's a fundamental difference if the pot is already on the stove before yom tov, and food is just poured inside; this should be permitted. ...
4
votes
1answer
753 views

Adjusting timers on Shabbat

Can one adjust a socket timer (picture below) on Shabbat to keep one's hotplate or lamp on for longer, etc?
13
votes
1answer
246 views

Did any classic rabbinic sources discuss static electricity?

Not much more to add here, I've just always wondered if static electricity was discussed in any Chazzal or Rishonim. Someone from those times must've gotten a good zap and I'm wondering what they had ...
5
votes
1answer
260 views

using static guard on Shabbos

Would there be any reason why one would not be able to apply static guard to clothing on Shabbos? Would it make any difference if the clothing is currently being worn or not? Two points: 1- I ...
12
votes
2answers
2k views

Smart thermostat on Shabbos - what should one do?

I read an article recently regarding a person who went to a hotel and realized after Shabbos began that all the rooms were controlled by smart thermostats. A smart thermostat detects when one is in ...
4
votes
1answer
1k views

Apple Watch on Shabbat

Tech experts: Is there any way in which the Apple Watch could be used by shomrei Shabbat with limited functionality? Note: this question does not seek to ascertain whether the full gamut of features ...
2
votes
1answer
91 views

Snake lamps on Shabbos? [closed]

I have a pet snake that has two types of lamps. One lamp is turned on in the mornings (day lamp) and then the other is turned on at night (night lamp). They both are needed to produce light and heat ...
7
votes
3answers
421 views

Is this app really safe to use on Shabbat?

http://www.shabbosapp.com/ It is an interesting approach - trying to satisfy the major halachic issues, while skirting the stringencies. Halachically, what would be the status of using this phone on ...