Dlaczego Nie Nazywamy Fazy i Neutralnego Plus i Minus w Prądzie Zmiennym?

Witam,

Czemu na prąd przemienny nie można mówić plus i minus? Wiadomo, to nie jest prąd stały, ale w czym problem, żeby mówić, że z lewej strony mamy fazę, to jest plus, a neutralny to minus niebieski.

geberit333 wrote:

Why can`t we say plus and minus for alternating current?

Because in alternating current the polarity changes depending on the frequency of the power supply network.

geberit333 wrote:

but what`s the problem with saying that on the left side we have a phase, this is a plus, and neutral is a minus blue.

Read above, apart from that, there is no legal act specifying which side of the socket should be phase and which side should be neutral.

geberit333 wrote:

what`s the problem with saying that on the left side we have a phase, that is plus, and neutral is minus blue.

Because that`s not the case. We have a plus on the left and a minus on the right. But after a split second there is a minus on the left and a plus on the right. And so on. I hope you`re asking seriously.

ArturAVS wrote:

there is no legal act specifying which side of the socket should be phase and which side should be neutral.

The phase is assumed to be on the left. But I'm just letting you know, let's not get into too much discussion about it, because it always causes a lot of emotions

drunek wrote:

The phase is assumed to be on the left.

No, buddy, nothing is accepted. There`s no point. However, it is important that all sockets within one building/flat/apartment are connected in the same way. This is simply good practice and does not in any way affect the operation of connected devices (some are specific, e.g. gas boilers).

In vertical double sockets, the phase and neutral are naturally reversed. In practice, it does not matter because all devices must be designed in such a way that it does not make a difference.

geberit333 wrote:

Obviously, it is not direct current, but what`s the problem with saying that on the left side we have the phase, which is plus, and the neutral is minus blue.

This is not assumed because for AC devices the polarity of the applied voltage is irrelevant to the polarity of the supply voltage. All electronic devices powered by 230 VAC have a power supply inside, the first part of which is a rectifier bridge that converts alternating voltage into direct current - so regardless of the polarity of the input voltage, the bridge will convert it into a voltage with constant polarity. In turn, for single-phase AC motors (both induction and series), the polarity of the voltage does not matter, because their direction of rotation is predetermined by the internal structure of the motor and, as such, independent of the polarity of the supply voltage.
In such a situation, using a naming convention such as for direct current makes no practical sense. In single-phase AC networks, we are more interested in the potential of the wires relative to earth than to each other. Hence the terms "phase wire" and "neutral wire" are used - the phase wire is always at some potential relative to the reference earth, while the neutral wire always has a potential equal to the ground potential (i.e. its potential relative to the ground is equal to 0 V - hence the name "neutral". "). Therefore, adopting the terms plus and minus known from direct current would be very misleading here.

Macosmail wrote:

In vertical double sockets, the phase and neutral are naturally reversed. In practice, it does not matter because all devices must be designed in such a way that it does not make a difference.

Manufacturers have already noticed this problem and have released sockets with the phase non-conversion function.


https://www.hurtelektryczny.pl/pl_PL/p/Gniazd...z-funkcja-niezamiennosci-faz-biale-wysylka-w- 24h/94334?mfr=1&gad_source=1&gclid=EAIaIQobChMIltrl99TrgwMVpopoCR3Omwk2EAQYASABEgKy4vD_BwE

Thank you very much for clarification and explanation on this topic! <3

>>20918752
I was asking this question seriously because electricians recently attacked me when I said something like that. Someone simply misled me.

Added after 30 [seconds]:

>>20918824
Thank you all very much for your clarifications. I really appreciate it! Regards