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 __________________________________________________ Link to download the short-circuit current calculation spreadsheet: ????️ https://bit.ly/planilha-de-curto-circ... __________________________________________________ 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 __________________________________________________ To calculate an electrical circuit, simply divide the power in W by the voltage, find the current and find which conductor supports this current. If someone has already taught you this, and this is always how you determine the conductors to use in your circuit, I'm sorry to inform you that you've been sizing circuits incorrectly your entire life. Want to know why? Then pay attention! Determining the current of a circuit by dividing the power in Watts by the voltage is not even remotely the correct way to do it. In 6.2.6.1.2 NBR-5410 states that the cross-section of the conductors must be determined so that at least all of the following criteria are met: 1 - minimum cross-sections; 2 - Conduction capacity; 3 - Protection against overloads; 4 - Protection against electric shocks by automatic disconnection; 5 - Voltage drop; 6 - Protection against short circuits and thermal stresses. That's right, to correctly size an electrical circuit you need to meet all of these items and we've already talked about all of them here on the channel, except for protection against short circuits and thermal stresses. That's right, knowing the short circuit current at a given point in the circuit, in addition to being mandatory, is extremely important and we'll show you this in this video. But short circuit current is a complex subject that is often neglected by electricians, precisely because of its complexity, and when this topic comes up we usually hear two lies: "I hate math" and "it's useless". But why do we call it lies? First, because math is present in everything you do and you end up using it without realizing it when you need to add up your hours or points, when you need to multiply these hours or points by the unit value to arrive at an amount to charge, when you need to subtract an amount to apply a discount to your customer, or even when you need to divide the amount to be paid into installments. No one needs to love math, but hating it is impossible, because we have just proven how much you use and need it in your daily life. For the vast majority of electrical calculations, you do not need anything beyond the four mathematical operations and determining the short-circuit current is no different. We will provide a free tool to help you determine the short-circuit current without even having to do the math. But why do I need to determine the short-circuit current and why is it important? When a short circuit occurs, we have the presence of high values ​​of current and energy that need to be supported by the conductor until the circuit breaker trips. Even if the trip is very fast, a portion of the current and energy that the circuit breaker lets through until it trips will have passed through the conductor. So I need to ensure that the amount of energy that the circuit breaker lets through is less than the amount of energy that a conductor supports and I will only be able to meet this condition by knowing the value of my short-circuit current at a given point. To do this simply and quickly, we will provide a spreadsheet. See you next time! ???? Tune in to #electricity ???? __________________________________________________ Production and Editing. ???? Adoniran Freitas ???? Afrânio Freitas ???? Maecilei Leal ???? Dálcio Araújo __________________________________________________ Support: Life Print Company. ???? http://printcompany.com.br/site/