CHOQUE NO REGISTRO DO CHUVEIRO – COMO RESOLVER?

🎁 Products we recommend: 🔗 https://meli.la/2njVbpU __________________________________________________ Automate your electrical calculations with our spreadsheets: Link to purchase the Electrical Calculation Spreadsheet: https://hotm.art/ytd-planilha-calculo... Link to purchase the Load Schedule Calculation Spreadsheet: https://hotm.art/ytd-planilha-quadro-... Link to purchase the Electrical Plant Sizing Spreadsheet: https://hotm.art/ytd-planilha-plantas... __________________________________________________ Receive Eletricity content directly to your email! Sign up using the link below: 🔗 https://bit.ly/cadastro-eletricity __________________________________________________ 👇 Check out our content 👇 🔌 https://linktr.ee/Eletricity __________________________________________________ Shock from the shower faucet? Is it dangerous? What to do to avoid it? The water used in domestic supply in coastal regions, for example, is usually brackish, which is simply water that is saltier than that used in other regions of the country. Under such conditions, the water can become extremely conductive, that is, with low resistivity. Then we have the circuit conductor that touches the shower's heating element, which in turn touches the water, and this water touches the faucet internally. So when you put your hands on it and your feet are wet and in contact with the bathroom floor, the electrical circuit closes and a current flows through your body, causing a shock. So how to solve it? The first thing we need to do is provide grounding for the shower circuit, but not just grounding for the shower; we're talking about complete grounding, as we've demonstrated several times on this channel. Is grounding alone enough? No. We've shown in practice on this channel that depending on the amount of impurities or salts present in the water, you can suffer an electric shock even with grounding, which is only one of the items you need to solve the problem. Now that you have grounding, you need to provide another mandatory item in shower circuits: a 30mA RCD (Residual Current Device). The RCD is a device that will be installed in the shower circuit and will disconnect the power supply whenever there is what we call a current leakage. In simpler terms, this would be when the current passes through a place other than the circuit it belongs to, which in this case would be your body. Problem solved? Yes, but this solution might cause you another problem. Remember when we talked about how in simpler electric showers, the conductive parts of the resistor are in contact with the water? Well, that's it folks, that was our tip of the week, see you next time! Yes, depending again on the water's resistivity, current may flow from the resistor to the water and from there to the shower's grounding, since the resistor, water, and ground conductor are in constant contact internally when the shower is running. So, there's another leakage that causes the RCD (Residual Current Device) to trip, and in this case, no one needs to be present, as it trips as soon as the shower is turned on. If this happens, how do you solve it? Unfortunately, the combination of low water resistivity and the use of showers with conventional resistors can make it impossible for your RCD to remain on, even if your shower is indicated as compatible with an RCD. The water resistivity required for RCD compatibility is even stated in all electric shower manuals. What to do now? The solution in this case would be to opt for water treatment, which may not be so simple, or to use a shower with a shielded resistor. But what is that? As we've already mentioned, a conventional shower resistor is nothing more than a metal with certain characteristics, and this metal is in direct contact with the water. In the case of showers with shielded resistors, notice that the element where the current flows does not have direct contact with the water. This prevents the activation of the RCD (Residual Current Device), which, together with grounding, eliminates the possibility of electric shock at the shower faucet or in any other situation during a shower. Unfortunately, solutions are not always as simple as they seem. Showers with shielded resistors are more expensive than conventional showers and are often not accessible to everyone, but when it comes to preserving lives, there's nothing else to do, and this may be your only option. 💡 Pay attention to #electricity 💡