QUEDA DE TENSÃO NO CABO. POR QUE ISSO ACONTECE? VEJA NA PRÁTICA.

🎁 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... __________ 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 content from Eletricity directly in your email! Register through the link below: 🔗 https://bit.ly/cadastro-eletricity __________________________________________________ In this video we show how voltage drop in the cable, in single-phase circuits, can influence the electric current and power. Will the electric current decrease or increase? See it in practice. Subscribe to our channel: https://www.eletricity.com.br/youtube Voltage Drop - 1st video in the series: https://bit.ly/2S5G5m4 __________________________________________________ 👇 Check out our content 👇 🔌 https://linktr.ee/Eletricity __________________________________________________ Voltage drop is one of the factors that need to be taken into account when calculating the cable. Besides being a requirement of NBR-5410 (Brazilian standard for electrical safety), incorrectly calculating voltage drop can cause premature cable failure and load malfunction, often leading to burning or permanent damage to the load. The most common effect of excessive voltage drop is overheating of the cable caused by resistance to the passage of electric current. That's right, folks, anyone with a basic understanding of electronics will understand what I'm saying here. The cable acts as a resistor, hindering the passage of electric current through it. This resistance value of the cable, when multiplied by the current passing through it, gives us a voltage value across the cable. We know that no conductor is perfect, and copper also has its limits for conducting electric current, given by a value called resistivity. We will break down the formula for copper resistivity later to show you how this works. The important thing now is to understand that every conductor will create resistance to the passage of electric current, even if it is minimal. Therefore, it's important to size the cable so that the voltage drop across it doesn't exceed the values ​​recommended in NBR-5410. Another important factor in keeping the voltage drop across the cable low is that any voltage remaining across the cable will be lacking at the load, potentially damaging the load by forcing it to operate at a lower voltage than it was designed for. Another important point is the loss of efficiency: Imagine an electric shower that operates at 220V. If you can deliver 220V to this shower, you'll be ensuring it works at its maximum power, but if this shower is receiving 180V, for example, you won't be guaranteeing it's working at maximum power. Most likely, if you measure the water temperature, you'll notice a loss of efficiency in the shower's ability to convert electrical energy into heat. The electric shower was just one example, but we could cite a number of other examples. So, the most important thing, besides ensuring the voltage drop requirements according to NBR-5410, is to guarantee that your load is working at the maximum voltage it was designed to work with. Then you might ask: But what about full-range switched-mode power supplies that work with voltage variations from 90 to 240V? These are special cases that will be addressed in another video. I hope you enjoyed the video and don't forget to share it. 💡 Stay tuned for #electricity 💡 __________________________________________________ 👇 Most Watched Videos: What they DIDN'T TELL YOU about the CONTROVERSY of the 3-PIN SOCKET. 🎥 https://bit.ly/2JE4P07 How to Make Curves and Level Changes in Cable Trays. 🎥 https://bit.ly/2ABlrk4 Higher Voltage, Lower Current: Truth or Myth? We Prove It For You (Part 1). 🎥 https://bit.ly/2xvtzRB Do You Know All the Functions of Wire Stripping Pliers? 🎥 https://bit.ly/2GD5Sun What's Best for Branching in Electrical Panels? We Tested It For You, See the Result. 🎥 https://bit.ly/2MDdrHl We Connected 3 Lamps in a Star Connection without Neutral. Will It Work? The Result is Impressive. 🎥 https://bit.ly/2BzUkH1