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Learn in this video the correct calculations for sizing the correct cable and circuit breaker for the electrical circuit. If you have difficulty knowing which cable or wire is correct for a circuit, in this video I will present in an easy way the calculations with the correction factors, such as the temperature correction factor and the grouping correction factor, all as stipulated by NBR-541. Remember that NBR5410 helps us with tables 33, 36 40 and 42 that are shown in the video. These calculations are valid for both single-phase, three-phase or two-phase circuits, regardless of whether it is a 220V or 127V circuit. It is very important to calculate the cable correctly, there is also the calculation of voltage drop that will be shown in the next video. Videos mentioned: POWER FACTOR • POWER FACTOR! What is it? How to calc... DEMAND FACTOR • DEMAND FACTOR, UNDERSTAND IT EASILY! Learn more about our videos. Two-phase or three-phase? Which is better? • Two-phase or three-phase? What's the difference? What is alternating current? • What is Alternating Current (AC)? What is DDP or electrical voltage? • DDP, VOLTAGE AND VOLTS! I WILL EXPLAIN TO YOU ... How to do the star-delta closure? • STAR DRIANGLE 220-380v? HOW TO DO IT ... Check out our courses: https://www.eletricidadeonline.com.br... music: https://www.bensound.com/royalty-free...