⚡️ FREE CLASS: How to Do a Complete Electrical Installation from Scratch, Easily, Even if You Are Not a Professional Electrician: ➽ https://eletr.co/aula?utm_content=yt1... ------ ???? FAAALA ENGEHALL COMMUNITY ???? Join our community on WhatsApp to receive valuable tips and news in the electrical area, important information and much more. ???? ???? https://eletr.co/fala-eng?utm_content= ------ Did you like this video? ???? ✔️ Leave your comment and share with friends ✔️ Follow our networks ➽ https://eletr.co/links - - - - - - - - - - - - - - - - - - - - - - - - - - - I have a 220V equipment: is it single-phase or two-phase? Tell me my dears! How are you? Welcome to another WHAT'S THE QUESTION, here at Engehall. We received the following question on our social networks! "I have a 220V device, is it single-phase or two-phase? Interesting, right? And you already know the answer without watching the class? Leave it in the comments, and also take the opportunity to subscribe to the channel if you haven't already, and sit down... sit down because here comes a technical blow from Engehall... Well, answering today's question straight away, a device with a nominal voltage of 220V is considered a SINGLE-PHASE device! "But André, if it is 220V phase-to-phase, it is two-phase, after all, it has two phases." That's not quite right, my dear. The fact that the device is powered by two phases does not classify it as two-phase. If we look at NBR5410, more precisely in item 4.2.2.1 that mentions the live conductor scheme, we will notice that we have: Single-phase with two conductors; Single-phase with three conductors; Two-phase with three conductors; Three-phase with three conductors; Three-phase with four conductors; As a curiosity, this conductor scheme is due to the way the transformer is closed, but the most important thing in this case is to know the number of loaded conductors in each of these schemes. And for that, we will consult table 46 of NBR5410. Note that in both Single-phase with two conductors and Single-phase with three conductors, the number of loaded conductors is 2. “But what is a loaded conductor, André?” Well, the cables through which the electric current passes during normal operation of the equipment are considered “loaded”, that is, the energy comes through the phase cable, passes through the equipment and returns through the neutral cable. In a situation where we have two phases feeding an appliance, the energy comes through one phase and returns through the other. Cool André: But what is the difference between a single-phase circuit with 2 conductors and a 3-conductor circuit? For example, in a conventional 127V lighting circuit, on average we only use two conductors, one for the phase and one for the neutral, so this is a single-phase circuit with 2 conductors. In the 127V socket circuit, we already use 3 conductors, one for the phase, one for the neutral and we also need the grounding cable, so this is also single-phase, but with 3 conductors, since it is mandatory to have the “grounding cable”. This way we understand why there are only 2 loaded conductors in both the single-phase circuit with 2 and 3 conductors, after all, we only have current circulation between the phase and the neutral in both cases, after all, there is no energy passing through the grounding under normal conditions. Now, why do we still have two-phase 220V and three-phase 220V? Why is that? Well, that is limited to the general power supply of the installations or specific equipment. CEMIG here in MG, for example, supplies power at three levels: SINGLE-PHASE 127V, with only 1 phase cable and another neutral cable coming from the pole. TWO-PHASE 220V, with 2 phase cables and another neutral cable coming from the pole. THREE-PHASE 220V, with 3 phase cables and another neutral cable coming from the pole. Here in MG, to have 220V, we need at least a two-phase installation. COSERN in RN, on the other hand, only supplies power at two levels. SINGLE-PHASE 220V, with only 1 phase cable and another neutral cable coming from the pole. THREE-PHASE 380V, with 3 phase cables and another neutral cable coming from the pole. There, we don't have 127V available; the minimum is 220V, and it already comes between phase and neutral. And for this reason, a two-phase power supply is not necessary; it is either single-phase or three-phase, much simpler. Now, in the case of specific equipment, for example: A three-phase motor needs three phases and a grounding cable to function correctly, so there we have 4 cables arriving. In this case, only the three phases are loaded conductors, the grounding is not, so we have a three-phase without neutral, that is, 3 loaded conductors. But if we think about the power supply circuit of the panel that supplies power to this motor and of course to other loads as well, in many cases a neutral cable will also be necessary. So this power supply is provided by 5 cables, after all, t