We bought some great things from online stores in China. We also bought some...unsatisfactory things, for example. At the price you pay, you usually just record bad things as the cost of doing business. But [DiodeGoneWild] disassembled something that may be very dangerous if it does not meet the requirements: electric heating shower nozzles. He said they are common in Latin America and have a nickname "suicide shower."
We have seen lovely shower heads that change color, but they require batteries. What we are talking about here is connecting to a 220V mains power supply and drawing 30A current to immediately heat your shower water. In terms of the environment, this is great because you don't have a water tank and you can continue to heat and reheat, just in case you need hot water. But you don't throw the AC radio into the bathtub, so you have to wonder how safe this thing is to build. Well, you don’t have to doubt, because the video below will show us.
It's okay, looking at the design will make it funny. Immersion heaters already exist, but this design has nothing in common with the proven method. The green neutral wire has no fixed place in the plastic body. It just enters the interior, is not connected to anything, and is exposed to the path of water at the same time, presumably to prevent the water that is too conductive from causing electric shock to you. The heating element itself is just two (probably) nickel-chromium alloy wire coils directly exposed to the water.
If there is not enough water pressure, there is a low-tech pressure switch to prevent the coil from energizing. You want to prevent the equipment from catching fire.
The shower head is marked with 5400 watts-the basic math of 220 V at 30 A makes us expect more like 6600. According to actual measurement, it seems that the high-power coil is 9 ohms. You will see in the video that it is indeed so. The mathematics depends not only on the power consumed, but also on how much power is required to heat water in an instant water heater device like this one. . It is interesting to see him measure the flow of the shower with low-tech methods. The final answer is that the head really needs to consume more energy to really provide you with hot showers.
In Part 2 below, he actually connects things. Establishing a connection near the leak gave us Willie. We also know that when his GFI trips due to excessive ground current, this is a bad sign. It turns out that the ground current is slightly lower than 200 mA. If this doesn't scare you, maybe he will scare you where he measures 10V in the surrounding water pipes. Although the current is very low, the voltage can even be measured in the shower water. Although its power may not be enough to really heat water, it does seem to be effective.
We will stick to our passive shower head, thank you. We have seen that the homemade version will not heat the water immediately, which may be a more forgiving arrangement. But there are many easier ways to hack your shower.
> "In terms of the environment, this is great, because you don't have a water tank, you can keep heating and reheating"
In terms of the environment, electric showers and other "instant hot water" devices are not very good, because they increase the load changes on the grid, and fast-climbing power plants with the lowest efficiency and the most polluting can meet this change. Diesel engines are usually used to eliminate peak demand because even gas turbines will not react fast enough.
Resistance heating is a Victorian technology, it needs to die with coal...
Well, I will take a bite-so you have electricity and cold water sources, what suggestions do you have to achieve hot showers, such as having better or comparable power efficiency to well-designed resistance heating?
Really? Looking at the combination; power level form factor, radiation transmission and heat conduction issues, cost-effectiveness, ie. Don’t forget that the sum of capital cost and manufacturing, service and maintenance time in U.S. dollars is equivalent to calculating the comparative energy loss in operation at the accepted U.S. dollar/energy exchange rate. At the same time, it is recognized that the calculation of net present cost is important for correct analysis... For example, the resistance is very simple, and the loss is negligible. Compared with the heat pump infrastructure semiconductor or fluid or "other things", which method do you want to use in the shower head or the pipe leading to it, then you will have more complicated settings What additional fees are paid to account for the difference in energy loss in the results?
Cheer me up, Scotty. There is no intelligent life here.
The cost of heat pump water heaters is 5 to 10 times that of resistance water heaters, which can be a problem in the market. Even in places such as the United States and Europe, the initial cost is generally considered too high, especially in the United States because natural gas is cheap. In addition, they need more airflow because they get heat from the surrounding air. If it is located in a closet or somewhere shared with an air-conditioned space, cooling is an advantage in summer. If it is in a garage or outside closet, the cold air added in summer will be wasted, and if it is smart enough, it will operate as a standard resistance heater for most of the winter.
These are commercial off-the-shelf, you can buy them immediately. If you are in Manhattan and pay for electricity through your nose, and in situations where natural gas is not working properly, they make a little bit of sense. Otherwise, it is at best a fringe idea.
The price of heat pumps is falling rapidly, and the combination of heat pumps and regenerative boilers allows you to take advantage of cheap off-peak electricity.
This is the disadvantage of insta-boilers. When everyone is taking a hot bath, the price of electricity goes up.
Just read about water heaters based on graphene ink, surface area and flow rate play an important role. However, the ashamed microwave oven is only about 64% efficient.
36% of the lost will get fever, and you can recover! (Water-cooled microwave oven)
Leaving aside the jokes of Gates’ mini nuclear power plant, it may be able to offset carbon emissions more than all electric and self-driving cars hope to do, perhaps even more than solar energy. In self-driving cars, if they are used to replace light-weight railways or even scooters or motorcycles, they will actually greatly increase carbon emissions.
Still waiting for a service to pump reactor cooling water from your friendly neighborhood nuclear power plant directly to your steam bath. Um.
Well, of course you can, maybe you can collect the banana and Brazil nut waste in a suitable "pile" around a heat exchanger to preheat the cold water supply to the shower heater. The large amounts of potassium 40 and radium 226 may just be to offset power consumption. Heat exchangers can also be installed to collect warm emissions from showers and kitchens-when you set up a shower heater to identify your child's RFID or pin to use the least amount of electricity to win prizes, watch the children's game-teach logistics method. Het, then all extra brain functions require more food, which means more warm water kitchen waste-rich feedback/control: D
I know you’re kidding, but district heating systems are a bit like that. They are very popular and widely used in Finland; they extract hot water from the cooling systems of various power plants, cover a large number of houses, and provide them at a low price. Provide usable hot water. Power plants produce hot water anyway when they are running, so they can also earn some extra money from it. This is a win-win situation for both parties. Obviously, they will not pump the contaminated water around, but there is a heat exchange system there, which can transfer heat from the contaminated water to the drinking water, and then be pumped away.
https://www.washingtonexaminer.com/policy/energy/energy-department-teams-up-with-bill-gates-to-move-mini-nuclear-plants-to-market
This is feasible except that the reactor cooling water passes through one heat exchanger and its output passes through another heat exchanger. for safety.
Of course it can, but what is the frequency of maximum efficiency in a comparable form factor? If it is not at the mains frequency, what is the conversion cost and the power factor at any frequency? For more general questions, please see my reply to Simon Ludborzs...
Well. Resistance heating converts 100% of the energy into heat. As far as I can see, you have nothing better than this. If you use water or wind energy, you can't beat it. Otherwise, the heat pump is better, but it will not convert some mechanical energy or chemical energy into heat. It collects heat thermodynamically from the temperature difference and belongs to different categories. In the overall energy budget, I think that using a water-powered heat pump is like using water to turn a windmill to obtain heat.
You missed the point of absorbing heat from one place and storing it elsewhere. Think of it as a refrigerator from the inside out.
Yes, this requires work. If you can also use I time R and mechanical heating (put all of them outside the refrigerator = inside the house). What is efficiency in the real world? I mean power consumption and heating.
Yes, it needs to work, but not all of the heat it transfers comes from electricity, so it is more than 100% efficient for residents. You input 1000W, output 3 or 4000W... only consider the house, it is not a closed system, considering the earth, it is, but the extra is mainly from the sun, and any other sources that emit heat into the nearby air, such as you Neighbors are warming up the car. https://en.wikipedia.org/wiki/Coefficient_of_performance#Example
I cannot prove economic rationality here, because the air source pump can only be used for 2 months a year, and the ground source pump must be drilled very deep. (Also calculate that they are only valid if you are the only person nearby who owns it, unless it is a more decentralized community.)...and I pay less than a quarter of the gas and electricity bill.
> "Because the air source pump can only be used for two months a year"
Where do you live? Arctic?
A good air source heat pump can work under good CoP conditions as low as -5 C.
Hydropower can reach a conversion efficiency of >95%.
Use any available method to smooth power peaks. Hydroelectric power plants can usually be started very quickly. There are even some water storage plants that have a height difference between 2 lakes and a turbo pump combination. It generates electricity when demand is high, and pumps water back to the upper lake when there is excess power. One of these plants is the French "Lac Blanc" and "Lac Noir" lakes. (English Wikipedia does not mention power plants) https://fr.wikipedia.org/wiki/Lac_Blanc_(massif_des_Vosges)#Activit%C3%A9_hydro%C3%A9lectrique
Some other methods: https://en.wikipedia.org/wiki/Load_management Surprisingly, diesel generators are also mentioned and are "private"? ? ?
I have lived in Brazil for a few years...75% of their electricity is hydropower.
They actually upgraded the local Furnas factory in Rio Grande, Minas Gerais, and when I lived there, its output roughly doubled (from when it was first installed in the 1950s-60s)
great. How do we get the Swiss pioneers of hydroelectric power to pump water back into the mountains? nuclear.
Grand Coulee in Washington has pump generators and a high lake.
I want to mention too! I really like public tours of the dam (place).
Hydroelectric power is also the cheapest source of electricity, and the cost per kilowatt-hour is even lower than that of nuclear power and coal.
Unfortunately, hydropower is not scalable. All good rivers have been dammed, and building more artificial lakes will have environmental consequences, such as methane emissions from covered land.
Another advantage of the whole battery movement wall
If everyone takes a bath at exactly the same time, then load changes on the grid will become a problem, which is unlikely. In terms of the environment, they are good because the heat loss in the tank does not waste electricity.
BigClive also did this a long time ago https://www.youtube.com/watch?v=cNjA0aee07k
BigClive completely disassembled this thing. This video is a good compliment to the actual measurement.
Beat me. Like BigClive again
BigClive also produced a video about Turkish rice cookers, which use water itself as a resistive element.
North American electrical appliances will not be deadlocked like that... Oh wait... https://www.amazon.com/dp/B00099YJH2/ref=psdc_7031378011_t1_B0070P0E7M?th=1
A few years ago, we had an evaporator whose two electrodes were hung in water in a large glass jar. The jar was placed in a metal bucket around the lower part. The electrode is part of the bakelite cap screwed onto the bottle. There is a small bathtub under the steam port for some Vicks Vap-O-Rub.
I don't know who will actually buy and use the items in the feature article, unless he is eager to win the Darwin Award as soon as possible.
The very poor people living in huts...that is, all of South America...
Not all of South America, my old idiot...not all...
People from countries that are not as stingy as citizens of the United States and the European Union have far fewer accidents than boilers...
Even the rich in Brazil use them almost universally... They are not that dangerous. The poor do not have them because they often cannot afford electricity, so just put a water tank in their room and take a bath at night after the water tank warms up in the sun.
The real suicide showers are those old showers that are still in use occasionally. These showers are occasionally used when there is no electricity... It is the alcohol burner in the shower head, if it flips/overflows you will catch fire ...At least there is water near you...
https://www.youtube.com/watch?v=Xk7yywY6-dg
We have this type: https://balaroti.vteximg.com.br/arquivos/ids/165955-1000-1000/2475.jpg?v=636445670829670000
*The water tank on the roof is usually concrete, fiberglass or plastic, and sometimes stainless steel.
.. And you can use that copper coil to make more alcohol, so in the Brazilian climate, it is basically a self-sufficient hot shower;)
Seriously, thank you for the interesting link.
To me, it seems safer than the electric type... Just be careful not to hit it with your hands when washing the armpits, so you are safe.
Very poor people don’t have electricity...They are poor...They live in huts...No gas, no electricity...Mr. Rich, the hot water provided by a kerosene heater.
Can the trivial wires from the shower head provide 30A of current?
If they pour all the heat into the water, how can they overheat?
Not the heating element itself, but the N+L+E wire from the shower head
Not really...so they will get hot, as well as the wires in the connection block and the wall, and the dust in the fuse box. But compared with the power of the heating element itself, all of this is negligible. So who cares.
A youtube video about people visiting a foreign country, one of them taking a shower, and then using this shower head in shock and horror movies. While watching these videos, I kept thinking, if they are really so dangerous... then why do they still exist. So, therefore, I think there is a problem with the users/observers of these showers... Some people claim that they feel tingling when standing in these showers, somehow, I can imagine.
But the locals must feel this too... if they do... these showers must be terrible, so the design will disappear. But usually the locals are much smaller than the tourists, and because the tourists are taller, they stand closer to the shower head to make better electrical contact. We all know that when the water flow reaches the floor, the water flow is no longer constant, it will break down into water droplets, the water droplets will not conduct electricity, the water flow can. So when you are very tall, you stand in a stream of conductive water and feel the tingling sensation. But if you are very young, when it touches you, the water is no longer a stream, so the water cannot flow.
In other words... if used properly (there is enough distance between the shower head and the user's head), the shower is (somewhat) safe. Some things are explained in the second video of about 14 minutes.
Now I am not saying that these are the safest shower heads, please stay away from them as much as possible. But what I want to say is that these shower heads (if connected correctly and used as intended) are not as deadly as everyone would like you to believe. You just need to know how to use them, just like everyone knows that you can't reach into a working toaster or mixer.
The video only confirms that it is a good thing to have (safety) regulations on such things, but the bad thing is that everyone can buy these devices over the Internet, so they can be imported and all regulations can be bypassed.
Some time ago, I watched a documentary about stealing electricity in "poor areas". Some people there make a living as an electrician, modifying electrical wiring for others nearby. A few people get electrocuted every year. This always happens to "stupid people" and never to "smart people" they think are themselves. The value of human life is not constant. This largely depends on your year of birth, the area where you live, and your level of achievement in the Maslov pyramid.
Sometime in the early 1990s, a company named Lexmin from India approached my company. The CEO was looking for someone in Australia for design, efficacy, safety, and approval for entering the Australian market and entering Europe and the United States. Comment on their products. He has many different statistics on electricity theft around Indian cities. Facts have proved that about 5,000 people die every year from climbing on the poles connected to the car battery jumpers, causing chaos in the three-phase wiring that powers single-phase refrigerators and cookers, leading to various power outages and a large number of power surges. The CEO claims that his entry path is simple, but it turns out that due to the existence of multiple layers of bureaucracy, the reality has become very bureaucratic, and then about 50% of the trading company (paid by O/seas company) must be “allocated” to the local Control rights-all of this has stifled exports to India and even 80% of the products produced there: / This proof-of-concept unit was specially made to adapt to very wide voltage fluctuations... http://members.iinet.net. au/~erazmus/Power/Indian_inverter. jpg
When I was on vacation in India (Goa), the most "power fluctuation" I observed was "off", several times a day, lasting 10 minutes to 1 hour. Almost every store or place I have lived has such inverters and truck batteries. Usually powers one or several lights/rooms and ceiling fans. This is of course more important when you cannot use the air conditioner.
Well, thank you Martin, I have friends who have been back from Goa for about 12 years, but have not noticed the problem of power fluctuations, even though they live in the main hotel with a lot of backup power, I think your experience in Goa is when you are interested of?
25 years ago, when I visited a church missionary in Colombia. They said they paid the electricity bill to set an example for neighbors in the neighborhood. They forgot to pay for a month, and the power company went out of power. When they went to the "city center" to pay their bills, one of their neighbors (without their permission) climbed up the pole and reconnected the wires!
I really wish I could take a picture of a telephone pole in a newer block (invasion~n), it has about 30 wires radiating from it!
Unfortunately, I saw that something similar only consumes power near the top of the sinusoid, the peak is very high, and the RMS is low on average a little less than 15 amps. It is simply not a suitable situation. Geesh-just to show that when people who are uneducated, well-informed, and unable to care/consider the consequences produce dangerous goods, there are risks in many places:/
In another case, a friend who runs an EMC/RFI laboratory in Western Australia (240v) was asked to test a "power splitter" so that Americans should be able to make coffee and toast breakfast bread at the same time under a 115v 15 amp power supply. Uh-the basic time function analysis failed. It can be said that the "inventor" ignored the core issue...
I can do this easily... but I have a 1000W toaster and a 350W small two-cup coffee machine. (Pick it up so I can make coffee with a 400W inverter)
In fact, this is the way to go, especially in the past ten years or so, with higher-capacity lithium-ion, faster charging technology, etc., unfortunately, the "inventor" at the time was Emotionally so focused on his erroneous thinking through the power distribution method and my friend's uncomfortable self-inflation with the inventor in any challenge, it died very quickly...
Plug your American coffee machine into 240v, and then you can toast on the embers. mission completed.
Do houses in North America still have hot water tanks? In the UK, combined boilers are common household heating equipment, gas instantaneous water heaters. In my house, the size of the boiler is a bit larger than usual, so it can also heat the shower water while heating. Most British households run electric showers, but obviously not suicide showers. These have their own circuits and circuit breakers, as they usually consume about 40A at 240v
They definitely can, and often "upgrade" to the same old heater tank
The combined boiler seems to be a very European thing (maybe because we have a natural gas network?). My American friends all have big electric water heaters. I have an electric boiler for water and showers and a city-wide central heating system that heats all houses with hot water through pipes.
The central boiler allows simple use of multiple heat sources. Examples include solar energy, heat pumps, and electricity (backup).
We are indeed. We provide hot water through uninsulated PEX or copper pipes, allowing many feet to penetrate the concrete slab or external subfloor. In most cases, this is because this is the cheapest way for developers to establish a regulated residential or apartment community to get the job done.
Of course, you can modify some tankless heaters throughout the house. The cost of a tankless heater is approximately 2 times the cost of a tank heater, and then 4 times the cost of various licensed contractors operating gas/electricity and piping systems under license. Sometimes, local utility companies run incentive programs to help reduce costs and improve efficiency. However, we are focusing on home equity here, and $5,000 for a more efficient hot water system is not as attractive to potential buyers as a new kitchen counter or solar energy.
So we didn’t really do it without a water tank, but came up with such a ridiculous expedient: https://www.homedepot.com/p/Watts-Hot-Water-Recirculating-System-with-Built-In-Timer -0955800/ 100426993
"However, we are focusing on the net worth of the home here, and the $5,000 invested in a more efficient hot water system is not as attractive to potential buyers as a new kitchen counter or solar energy."
Just make sure that the smart meter is always overcharged to correct the problem.
"Neutral Green Line"... Of course yes, if you happen to be a DIY homeowner of a redneck.
For professional electricians, the neutral wire (in the US) is always a white wire. The green wire (ground wire) is always brought back to the main panel and connected to the ground bus (there will be a "ground" ground and also connected to the service inlet input neutral wire).
...In the UK, everyone knew that black was neutral (red scene) until we were forced to switch to the EU system (blue neutral, brown scene). If you encounter any older wiring, now you must know both.
Oh, you poor fellows...you must remember two things now:(
with? Other countries have also changed the color coding. Standards are always evolving. As a scrapper, I encountered very old (before World War II) wiring that had completely different schemes or no schemes at all.
IIRC designed a blue-brown-green/yellow scheme, so if you happen to be color-blind, you can still distinguish different wires.
It is the same in Germany: some older devices still have red, black and white wires (I think white is PE).
Until you move to the United States, where black is alive, white is neutral, and the earth is just bare copper in the coat-if a mouse bites a wire, it should be like this, hope they touch the bare earth instead of each other
I think red is PE, at least in Austria. But maybe you have also encountered an old installation that was installed incorrectly.
Do some research...it is not a real EU directive, but a global standard proposed by the International Electrotechnical Commission (IEC 60466).
See https://www.allaboutcircuits.com/textbook/reference/chpt-2/wiring-color-codes/
But...but...what about the evil EU regulations? :D Seriously-this is a very interesting fact! I also think this is a European-only standard.
I'm fairly certain that the EU is the only region that fully adopts blue/brown/green-yellow colors, even if it aims to become an international standard.
My employer provides many variants of the equipment we manufacture according to the intended destination. Usually the power cord and the plug are the main differences between them.
I think in Austria, before we get black (or brown), blue and yellow-green, it is red (PE), black (L) and gray (N). This change must sometimes occur in the 1960s or 1970s, even long before the European Union existed. So yes, when you encounter an older installation, you also have to deal with different color codes. If you have questions, don't believe it, but measure it.
Wow. This is a lot of standards. And... they are all counterintuitive, so terrible!
OK. For those who have truly learned the standards, as long as they consistently follow any standards, they can do it. In addition, it is obvious that the concepts of heat and electricity are not the same thing. but…
What do we usually call "live" wires? hot. In most people's minds, there is a natural connection between electricity and heat, even those who don't know anything about electrical safety. In addition, there is a connection that is likely to be hard-coded into our brains. This connection is formed between our early use of heat and color (such as red, orange, yellow, and to a lesser extent even white). Ask a person who has never learned any color codes, which one they think is the fire line and which is the color they want to choose.
At the same time, black, brown and blue...we will naturally associate them with the cold water and the earth.
Are these people thinking when they come up with these standards? Do they want to maximize the number of dead bodies? ! ? !
The only thing any one of them does right is the earth's green standards.
Those are Lorenzetti clones, the most counterfeited products in Brazil. Generally, the shower plug in the bathroom is grounded, although it is not recommended to use a plug, because the current can pass 20A, the manufacturer generally recommends a direct connection.
Use a sealed resistor model when you have a GFI, it is called "quatro estaçoes", but it may cost $100, and these cheap models can be easily found for only $10.
The entire pipe is made of plastic, including the shower valve. In the colder south of the country, they use gas showers, where the temperature is rarely lower than 20 degrees Celsius. It usually uses an external switch, so people rarely come into direct contact with the shower when taking a shower.
Portuguese and Spanish are used in the manual, although there are some errors, at least in Portuguese words.
I don't know Costa Rica or Nicaragua, but I remember my father told me that Brazil does not use grounding in the grid. If there is no ground, there is no return path for the power to return to the source, so if a failure occurs, you will be completely safe. If we use public grounding, this is counterintuitive in the United States. The result is that if you touch one leg of the trunk in Brazil, you will not be shocked unless you touch the other side of the trunk, everything else is safe. But I still don't plan to test this theory. I have been trying to find more "current" information about this, does anyone know anything about this? My information is 40 years ago.
I'm not sure how it works... the ground voltage is 0 or "neutral" voltage. Your active voltage is a positive or negative non-zero voltage. It is the relative difference in voltage that causes the current to flow. If you have 2 wires with different voltages, at least one of them has a voltage different from the ground voltage. If you complete the circuit, current will flow regardless of the weather, and the "ground" connection is part of their electrical standards.
[quote] I'm not sure how it works... the ground voltage is 0 or "neutral" voltage. [/quote] You absolutely do not understand aztraph's statement. If the "ground" is connected to the utility grid (usually at some point in the power plant), it has only "0 voltage". If the "ground" is not connected to the grid, then it is actually the same as standing on a rubber pad in a system where the "ground" is connected to the "ground wire".
I have a vague memory, which will cause capacitive coupling problems.
No one uses grounding in their power grid. The ground must be created locally. In the United States, the ground of a house is actually a long copper-plated steel rod that goes deep into the ground. The neutral wire from the step-down transformer (installed on the pole) is connected to the local ground connection (called ground) at the breaker box where the power enters the house.
The Brazilian power grid has a grounded neutral point. It also has a ground wire, connected to a grid on the non-fake shower, through which the water passes after leaving the heating element.
The same is true in Mexico. I take a shower in a hotel, and the bare bulb above the shower head is connected to the junction box on the wall with one wire, and the other is connected to the pipe in front of the shower head with a hose clamp! Therefore, if the pipe breaks or there is a plastic pipe somewhere leading to the shower room and there are bubbles in the pipe, I will be a neutral return path.
Please refer to the information, I need to be sure, not just hearsay.
The concept of the grounded "neutral" wire is because the insulation is not perfect, people lay wires in stupid places, and accidents occur. In other words, many people were electrocuted because one of the power cords accidentally touched the ground, and they completed the path between the other cord and the ground. Grounding a wire means that you always (if it is connected to the code) know which wire is dangerous. Grounding also provides some protection against extreme voltage surges, that is, voltage surges that cause arcing, such as those caused by nearby lightning strikes. By definition, a lightning strike is an attempt to complete a path to the ground. Being close to the ground wire (or ground junction box or metal equipment enclosure) helps prevent surges from using nearby people as a conductor.
The safety of the grounding wire does not lie in whether it is safer when you touch wires that you should not touch, but in the safety when a short circuit occurs inside the device. If any conductive part in the case is connected to the ground wire, then when you smash it with a hammer and the hot wire short-circuits the case, it will draw all the current and trigger the circuit breaker. This improves safety because otherwise the device may sit there with the chassis under high pressure. In addition, if you completely short-circuit and throw away the circuit breaker or blow the fuse, the fire hazard is lower than the long-term short-circuit.
It's like the device is sitting on a rubber mat, you don't know what's wrong, and then you touch it and provide a ground path!
However, if your power is input through a jumper cable without a circuit breaker box, you will definitely not benefit from the ground wire!
However, don't think that this means that there is no connection between the neutral and ground, because there is usually! Maybe your neighbor tied their water pipe to the water pipe to improve the TV reception.
I think it is really smart. Not that I will use it, but you must be impressed with how it works and considering the cost.
If the green wire has more exposed surface area and the connection wire is longer, you can connect the connection two meters away from the shower, it can even be very safe. for a while.
I will let you try it, and if you don’t report we will know what happened.
You got his name wrong. It is DiodeGoneWild (as in a diode, not a complex number)
Well, you are right, I fixed it. But have you ever watched a late night TV commercial for a video called "Girl Gone Wild"? Doesn't it sound the same?
It is better to be wilder than the earl.
So you mean I shouldn't hang it in my house that has no circuit grounds for more than 100 years? Ha ha
As usual, people eventually attribute the whole continent to the same thing.
At work, many people here are the same height (1.7 to 1.8 meters). So, if the number of tourists is much higher, where do these 2.5 million tourists come from? Mars?
That kind of shower head (the only place I saw in the hackaday article called a suicide shower) has been used here for nearly a century. I remember that the most accident stories I hear come from people who use gas heaters.
If installed correctly (ground wire, wire of correct size, etc.), they can work normally and are very safe. If people use the wrong parts (some people who call themselves electricians like 220V installations because they can use thinner wires, so we can see those leads...) then obviously there will be a problem. What if someone uses a garden hose when installing a gas water heater in order to save costs? Or is it cheap pvc tubing used only for wires in pressurized water systems? In addition, the code recommends welding joints or ceramic screw blocks. People who just twist the wires together can't expect much quality :)
I can't talk about other countries, but for more than half a century, Brazil's electrical codes have stipulated the grounding of all devices. Whether people install them is not the code or device manufacturer's error. Similarly, some bad installers just connect wires to anywhere, and some even connect to the steel skeleton of the building wall.
certainly! Just use gfci protection.
If none of the 2/4 wires entering the house are locally grounded, the GFCI may not work because the resistance to the next grounding location is "too far", so the ground fault current may be very low...
The grounding point is designated at the meter, at the entrance of the house. About 3m long copper bars were dug into the ground. The length varies according to soil moisture and installation dimensions.
When I was in a poor and not-so-poor area of Costa Rica more than 10 years ago, shower head heaters were very common. I saw (and used) some terrible devices. It's like the one connected to the knife switch exposed on the wall. And there is no third wire to connect the ground wire in these places, but a genius made up for this by gluing the ground to the water pipe.
Regarding the material of the heater...I strongly suspect that it is not nickel-chromium alloy. (I once tried to use nickel-chromium alloy as an immersion heater. It worked for a while, and then it stopped. The water turned green. I thought it was some oxide of chromium.)
I guess it is just stainless steel. The resistivity of 316 stainless steel is 7.5e-7 Ω·m, so the resistance of 1 meter of 28 ga stainless steel is 9 ohms.
These showers are the rule of Brazil. I personally own a bunch of different ones (its heating element burns every year or so) and have never heard of a death case.
This is indeed one of the scariest thoughts I have ever heard. In fact, this trips the GFI, which means it will eventually kill someone when the ground wire oxidizes before you change the ground wire. I started to see Brazil as a very primitive society, allowing this technology to be used.
There are ceramic water heaters that truly comply with CSA/UL/CE standards, and they are often used in motorhomes... They even run on batteries and last for a long time (5-year warranty). Out of love for e-Jesus, please start manufacturing or selling them in your town.
The man who made these shower heads is the murderer.
I really don't know how these showers work to not kill people, but I assure you they won't.
Regarding your comment on Brazil’s normalization and safety, I would like to point out that the country strictly follows best practices and international normalization; this is because the markets where we export goods (EU, US, etc.) require us to comply with their standards (CSA/UL) /CE), so basically anything we sell to you is also consumed internally.
Based on the ceramic heater used in the trailer, I don't know why it has not been adopted in large numbers (because you pointed out that the current solution used here is much safer).
I know that there are very similar high-power instant water heaters (up to 24kW) in Europe, and they are also called "blankdraht" (bare wire) heaters. They are three-phase, star point to the outlet side, and have the maximum conductivity specification of water. They are installed more concentratedly than shower heads, but rely on the poor conductivity of ordinary water and a certain length of water column. Work with grounded pipes without any problems.
I want a link, we live in a RV, it sounds like a propane saver... but we are in the US 110
Does your electricity come from a solar system? Otherwise, I expect propane to be cheaper than electricity on a per kilowatt hour basis.
Many things people do may become the main cause of death in an area without causing discussion. What you hear is more about what the local news wants to talk about.
I want to know that some actuaries have spent a lot of time on this and come up with some figures, and then I believe that the death toll is low rather than high! If people never talk about it, there are many potential causes, including the cause of death that may be attributable to other reasons.
certainly. They might report that the burned person’s heart stopped beating in the shower as a gunshot wound, right?
Just insert this thing into a sealed bucket (steel to maintain pressure) on the roof, and then connect the plastic pipe from the bucket to the shower. Galvanic isolation FTW!
This appliance can enhance:
-Use solid-state on/off control (very cheap now). -Heating elements covered by electrical insulation. -Wiring terminals away from water sources. -Make the heater a transfer element away from the shower.
What will the hat do? Simple mechanical systems are usually more reliable than electronic control systems of the same price. Look at the microwave, the device that turns the tube on and off is the relay, not the tirac.
I think isolating the element will reduce its efficiency a bit, and I am not sure about the gain.
Keep the connection terminals away from water, I would agree, but if you have ever worked on submersible water pumps, they will indeed be waterproof.
The heater, I think it is more like a booster. Able to take warm water and make it hot. As mentioned earlier, it has almost no ability to heat cold water. Keeping it away from the shower head will only further reduce its effectiveness.
I'm not sure if I'm ready to try one, but if they work for most of the world, they can't kill everyone. It will be interesting to see when and what causes the death. As it shows, it makes me feel uncomfortable with Western feelings, but at the same time, if all I see is his meter reading on the device when grounded, I can hardly say that this seems dangerous.
I look at it a bit like an electric device for a gasoline-powered self-pressurized camping stove. If you have never seen one of them, it is a small metal gas tank with a pipe on top that connects to the burner where you are cooking. The fuel tank is also located above a part of the burner. You fill up the fuel tank, put the lid on, and tilt it so that a little bit of liquid gas will drip into the burner and ignite it. You will see a large group of nasty orange flames. It slowly goes out. If everything goes well, it will be enough to heat the gas in the fuel tank. After a few minutes, it will start to evaporate. Your nasty orange flame will slowly turn into a nice hiss. The hissing blue flame, just like on a gas stove. They work, but you are cooking with a minimally controlled Molotov cocktail. At first, these also made me feel uneasy about Western feelings, but I quickly got used to them, and if used properly, they would start to appear normal and safe.
In my own store, I frightened people. I have a propane heater without vents in a shop that usually doesn't have heating. I run it with a 20-pound water tank. A 20-pound water tank does not have enough surface area for gas to boil out of the liquid, and when it is really cold, even less gas is boiled out. So what should I do? I put the water tank on top of the heater. It scared people directly. But during the course of the day, the water tank felt almost no temperature to the touch, and I couldn’t see the difference between the “high” and “low” settings of the burner, so I suspect that it still doesn’t get the pressure it really wants, but it’s like Like a camping stove, once heated, it will burn better, and I am not at all paranoid about tank explosions. In the hot summer, the chances of doing so are much greater.
The flow test is incorrect using a completely different shower head to generate time.
I have never heard of anyone dying while using an electric shower head.
Some of the better houses nearby will have solar water heating. Then you can use the electric shower when it's cold and turn it off when you use solar energy to heat hot water.
In the end, this is just a complaint from people who have never used it or know how it works. Yes, there are Darwin Prize installations, but this happens to many different things around the world.
I used to live in Europe and I have seen (plastic) open electric kettles with only two wires immersed in water :) It is not just Brazil. Americans are a little... slow, sometimes.
Interestingly, they invented and used the "Five-America" radio without a transformer. Firewire is often connected to a metal chassis :)
https://en.wikipedia.org/wiki/All_American_Five#Potential_hazards_of_the_design
In a rich and poor society, I want to count the number of "electric shower heads" and gun deaths (Hello America) or car accident deaths... or drug-related deaths. Zero to???
In fact, if you consider the deaths caused by firearms, Brazil can easily win, even in car-related accidents. I am pretty sure Brazil’s death toll in drug-related accidents will be close to that of the United States. I live in Brazil, I have a degree, study and work in the United States and Singapore, speak four languages, drive a BMW M5, no, there is no "suicide shower" at home. In fact, I have never seen anyone in Brazil use the term: "suicide shower" This is something new to me (I'm almost 50 years old), but I remember enjoying the hot water of these things many times as a child. When I grew up, I even replaced the heating elements and sometimes patched them. As an electrical engineer, I have seen many poor places in Brazil. Some places have no electricity, but they can get hot water through many innovative techniques. I don’t know if you have noticed that the winter in southern Brazil is very cold. The largest city in Brazil (São Paulo in southwestern Brazil) alternates between 5 degrees in winter and 40 degrees in summer. But the point is: Brazil is a place with many extremes. We can have very rich people, very large cities, and very poor places. Brazil is not for beginners: life here can be difficult. People must work hard to make their own things the same as the United States. But you can also live comfortably here. I think LH can have a complete series on "Brazilian hackers" if they have a writer who can read Portuguese. I can tell more than a dozen stories about living off-grid in Brazil, where the term "necessity is the mother of invention" has existed for more than a century...
In the United States, you are much more likely to be shot by the police than in a mass shooting.
I had to use one of the 120v versions before. It didn't heat the water so hot, it just removed its frosty edge. If your toe touches the metal shower drain, it will only shock you...
https://www.vaillant.de/downloads-1/prospekte-2/prospekt-elektro-warmwasser-stand-02-17-939731.pdf European VDE approved instant heaters actually exist. They are not like shower heads, but like small boxes with integrated surfaces that can be mounted on the wall. I actually used one in a hotel and worked (a bit: if you are patient, you will get 30°C water instead of 1°C water) They are more expensive anyway, almost the price of an ordinary electric boiler. In any case, the highest code showe head is mada but the cost is higher? The one in the video has many ut angles to make it cheap. I think the sealed resistor in the ground pipe, the plated contacts on the switch, the sealed switch and the sealed connector of the power cord will make the head fit the code, but at a higher cost. .
If you put a video recorder in the shower and the shower head kills you-then it will depend on snuff!
Although good wiring and GFI circuit breakers will greatly reduce the risk, it is scary. I am surprised that solar water heaters have not become popular in Brazil because they work very well there, although the upfront cost and the need for a separate hot water pipe may be one reason.
With such a device, you can also boil some eggs on a portable burner while baking bagels in the comfortable bathtub while balancing the 15-inch CRT TV on your knees. What could go wrong?
Well, I’m 44 years old, and I always take a “suicide” shower like this once at home. By the way, most Brazilian houses use one of them. There are no dead people till today...
Well, is this a kind of foresight, because when you say "until today", you are 44 years old, maybe your life is about to end-oops: D By the way: your name link goes to "The link you follow may be Has expired, or the page may only be visible to viewers who are not there"
The link here "only" wants me to log in to Facebook. no, thank you.
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