Link to purchase the Electrical Calculations Spreadsheet: https://hotm.art/ytd-planilha-calculo... Link to purchase the Load Panel Calculation Spreadsheet: https://hotm.art/ytd-planilha-quadro-... Link to purchase the Electrical Plant Sizing Spreadsheet: https://hotm.art/ytd-planilha-plantas... _________________________________________________ If you like the Eletricity channel and want to contribute to the generation of quality content, then access one of the options below: PIX KEY ???? [email protected] QR CODE ???? https://bit.ly/doacao-pix _________________________________________________ Receive Eletricity content straight to your email! Register using the link below: ???? https://bit.ly/cadastro-eletricity __________________________________________________ ???? Check out our content ???? ???? https://linktr.ee/Eletricity __________________________________________________ A very common question, even among experienced electrical professionals, is: What happens if I connect a 220V shower to 127V? Many insist on saying that it burns out because the current is high, since the lower the voltage, the higher the current. Is this true? According to a phrase that has practically become a mantra for some electricians, the lower the voltage, the higher the current. If we follow this theory, when connecting a shower manufactured to be used at 220V to 127V, we would have a higher current, since we are reducing the voltage from 220V to 127V. But the video shows us that this concept is wrong. We saw that since the resistance is fixed, if I vary the voltage, the current varies proportionally. In other words, lower voltage results in lower current and consequently lower power. But what if I do exactly the opposite? What if I connect a 127V shower to 220V? Those who have the theory of higher voltage, lower current in their heads say that the shower burns out due to the high voltage, but that the current is low. But the video shows us again that this concept is wrong. If I vary the voltage, the current varies proportionally. In other words, lower voltage results in lower current and consequently lower power. The shower really burns out, but not because the voltage increased, but because the current increased. We must always remember that showers have fixed resistance. If I increase the voltage, the current will always increase proportionally, and the opposite is also true. What leads people to make mistakes is that when they compare showers manufactured to work at 127V and 220V, but which have the same working power (for example, 5500W), they forget that the 127V shower has a resistance almost 3x lower than the resistance of the 220V shower. See the example below: Case 1 – 127V shower – 5500W – Resistance 5.3 ohms. Case 2 – 220V shower - 5500W – Resistance 15.3 ohms. According to Ohm's law, the current will be lower for the 220V shower compared to the 127V shower. But realize that the current will be lower not because the voltage is higher, but simply because the 220V shower has a much higher resistance than the 127V shower. Now imagine that the 220V shower has a resistance with the same value as the 127V shower. In this case, applying Ohm's law, it becomes very clear that the 220V shower would have a much higher current, which would cause its resistance to burn out (see the result in the video). When we apply different voltages to the same resistance, the resulting currents will also be different. If we increase the voltage, the current increases proportionally to this increase in voltage (directly proportional). What needs to be clear is that equipment with the same power value, built for 220V or 127V voltages, have resistance values ​​that were calculated for that specific power. If we measure internally, we will conclude that for the same power value, a 220V equipment has a higher resistance than a 127V equipment. So that's it, folks. Once again, the Eletricity channel has shown in practice an issue that is apparently simple, but still generates a lot of discussion among electricians. If you liked this video, leave a like. Don't forget to subscribe to the channel to help us reach our goal of 100,000 subscribers by the end of the year. I hope you enjoyed this video and see you next time! ???? Stay tuned for #eletricity ???? Leave your comment below. ???? ???? ????