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 __________________________________________________ Sizing a main circuit breaker is a relatively simple task, but we need to pay attention to some details. When we size a circuit breaker, we base ourselves on its total load. For example, if I have seven outlets in a kitchen circuit and I considered 600VA for 2 outlets and 100VA for the rest, as indicated by the standard, we have a total of 1700VA and we use this power value for the calculation, dividing 1700VA by the voltage and finding the current. This value is what we know as the design current. Now we need to meet the following condition: Ib less than In less than Iz Where In is the nominal current of the circuit breaker and Iz is the current capacity of the conductor under the conditions expected in the installation. We have videos about this here on the channel. In addition, we need to consider other factors from NBR5410, such as grouping, temperature, and we need to check how the cable is installed, respect the minimum cross-sections and also check the voltage drop. In the video, I showed a simple way to calculate conductors and circuit breakers that meet all these criteria quickly and easily with the GOORU Electrical Calculator. For a general circuit breaker, the situation is a little different, since we cannot consider the total load. Imagine adding up all the power of sockets, showers, microwaves, and irons, as if everything worked at the same time. We would have an absurd value of power and current and would need cables with very large cross-sections, in addition to circuit breakers with high current capacities. To size a general circuit breaker, we need to assemble what is known as a load panel, where we will insert all the powers and voltages of our equipment or circuits. We need the load panel to divide the powers between the phases, seeking to balance the currents. Since we will not consider the total power, we need to use the demand factor that we have already detailed in a video here on the channel. I left a card in the video. The demand factor is something that must be analyzed on a case-by-case basis, and the distribution standards of the utilities, which you can find for free on the internet, can help you. Let's look at an example with the CEMIG Standard, a utility here in Minas Gerais. If a residence has 3 5500W showers, I will not consider 16500W. I will apply the demand factor of 84%, that is, I am considering that the 3 showers will not be used at the same time. But note that if it were a gym, the scenario certainly changes and the possibility of all the showers being used at the same time is very high. With this example, it became clear that the demand factor is variable and must be analyzed on a case-by-case basis. Remember that there are factors for showers, sockets, motors, lighting, commercial facilities, and many others. Now that we have talked about the demand factor, we can see what our load chart would look like. You can do yours any way you want, but having spreadsheets or applications that do this for you helps a lot. In the video, I showed you step by step how to use the GOORU Load Panel spreadsheet, which, in addition to balancing phases, allows you to apply the demand factor, provides the single-line diagram of the distribution panel and also calculates the conductors and circuit breakers, all in a user-friendly and easy-to-understand format. These are not simple spreadsheets; they are a real tool that will help you make your work faster, safer and more professional. To purchase, just click on the link I left at the beginning of this description and take advantage of the super discount coupon that the GOORU team and we at the Eletricity channel have prepared especially for you. Using the coupon ELT10, you will get a 10% discount on the purchase of the spreadsheets. See you next time! 💡 Stay tuned for #eletricity 💡