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 __________________________________________________ In this video, we show how voltage drops in cables can influence electric current and power in single-phase circuits. Will the electric current decrease or increase? See for yourself. 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 must be taken into account when calculating cables. In addition to being a requirement of NBR-5410, not calculating voltage drop correctly can cause premature loss of the cable and also 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 who knows a little about electronics will understand what I'm talking about here. The cable works like a resistor and makes it difficult for electric current to pass through it. This resistance value of the cable, when multiplied by the current that passes through it, gives us the answer to a voltage value that remains across the cable. We know that there is no perfect conductor material, and copper also has its limits for conducting electric current, given by a value called resistivity. At a more opportune moment, we will break down the formula for copper resistivity to show you how it works. The important thing now is to understand that every conductor will create a resistance to the passage of electric current, even if it is minimal. Therefore, it is important to size the cable so that the voltage drop across the cable does not exceed the values ​​recommended in NBR-5410. Another important factor in keeping the voltage drop in the cable low is that any voltage that remains on the cable will be lost in your load, which can often damage the load by forcing it to work with a voltage lower than it was designed to work with. Another important point is the loss of efficiency: Imagine an electric shower that works with 220V. If you can deliver 220V to this shower, you will be ensuring that it works at its maximum power, but if this shower is receiving 180V, for example, you will not be ensuring that it will work at maximum power. Most likely, if you measure the water temperature, you will notice that the shower has lost efficiency in transforming electrical energy into heat. The electric shower was just one example, but we could mention a series of other examples. So the most important thing, besides ensuring the voltage drop requirements according to NBR-5410, is to ensure that your load is working at the maximum voltage it was designed to work with. Then you'll ask me: But what about full-range switching power supplies that work with voltage variations from 90 to 240V? These are special cases that should be covered in another video. I hope you enjoyed the video and don't forget to share it. ???? Tune in to #electricity ???? __________________________________________________ ???? Most Watched Videos: What THEY DIDN'T TELL YOU about the 3-PIN SOCKET CONTROVERSY. ???? https://bit.ly/2JE4P07 How to Make Curves and Unevenness in Electrical Cable Trays. ???? https://bit.ly/2ABlrk4 Higher Voltage Lower Current, Truth or Myth? We'll Prove It for You (Part 01). ???? https://bit.ly/2xvtzRB Do You Know All the Functions of the Wire Stripping Pliers? ???? https://bit.ly/2GD5Sun What is the best way to connect electrical panels? We tested it for you, see the results. ???? https://bit.ly/2MDdrHl We connected 3 lamps in a star without neutral. Will it work? The result is impressive. ???? https://bit.ly/2BzUkH1