Choosing the Right Cable for 500V 32A Metal Power Socket & Calculating Fuse Power

Hello, I have a question because I have a metal power socket with 4 contacts, 3p + Z, on which it is written 500V 32A, except that the protective conductor is connected to the socket housing and the socket protection is an overcurrent switch, a Kanlux C16 fuse
So my question is what cable is best to use for this power socket so that in the event of a short circuit or overload it would blow the fuse and not burn the cable because I have a 3.5 kW motor for a circular saw for cutting wood and one more thing - how to calculate the power of a given fuse? in a single- and three-phase system, I would be grateful for a formula and an example calculation of a single- and three-phase system
Please reply
Regards.

Hello
Link
You can handle this already.

You just need to search a little

Oh, the use of a YDY 4x2.5mm2 cable is enough for a 3.5 kW motor and C16A protection. In the event of a short circuit or load, this fuse will work and the cables will not burn.

For the engine, use OWY rather than YDY due to vibrations.

yes, I understand OWY from the power socket to the motor, but I mean from the C16 fuse to the power socket, permanently placed under the plaster in the wall, so I'm asking if Ydy 4x2.5mm2 would be enough for this motor in the event of a short circuit and it wouldn't burn the wire, but the fuse would blow out
because when cutting thicker wood, the motor sometimes jams, perhaps a more powerful one would be useful, and therefore I would like to know whether such a cable will withstand overloads and short circuits in the wall.

All accessories dictated by the socket.
Its rated current is 16A, so the rated current of the protection cannot exceed this value, which in turn translates into the minimum cable cross-section, which cannot be less than 2.5mm2 Cu.

Please note that under no circumstances should the neutral wire be used for any purpose other than connecting it to the receiver housing in protection class I.
It cannot be a working cable.

kkas12 wrote:

Its rated current is 16A, so the rated current of the protection cannot exceed this value, which in turn translates into the minimum cable cross-section, which cannot be less than 2.5mm2 Cu.

The socket is 32A, so the protection can provide a maximum of 32A. Read first, write later.

I also had C16 at home, but I added 4mm² Cu as a spare and it turned out to be right because after some time I needed to connect a more powerful receiver and I could easily increase the security. If you are sure that you will not connect anything more powerful there, use the YDY 2.5mm².

And the pre-meter protection is most likely 25A.
(That is, think first, write later.)
So there is no point or justification for installing what you currently have.
I have about 200m of YAKY 4x4 lying around and will never be used again.

These metal sockets are not the happiest solution these days.
Substitutes that are much safer to use are readily available.
It is recommended that the metal socket be preceded by a switch.

Oh, I understand, and I would also like to know how to calculate the power for a given fuse in a three-phase system, e.g. for a 10A fuse, because in a single-phase system I know that it is done according to the formula, example

power input 2200 W + 1710 W = 3910 W
the intensity is given by the formula I = P:U
I = 3910 W : 230 V
I = 17A
U=voltage
I=intensity
I would like to know what it looks like in a three-phase system because in a single-phase system, to obtain power, the current is multiplied by the voltage, and to obtain the rated current, the power is divided by the voltage, and what does it look like in a three-phase system, please answer
Regards

Hello,
First of all, what length should the connection cable be?
secondly, class C fuses are a bad idea in households, they have a long tripping time,
thirdly, what is the main security or "C".
fourthly, the engine is protected by a thermal trigger: a "thermik" installed preferably next to the engine - it should be the first to work, not the popular "S".

The characteristics depend on the starting type of this engine. If it is light, characteristic B is actually enough. When cutting thicker wood and stopping the engine, it will not fall out so quickly. It has never happened to me that the B16 overcurrent switch tripped when the engine of the same power stopped several times. As the colleague above mentions, you need to protect the motor winding against overheating.

Hello, I have an overhead connection, an ASXSN 4x25 cable, and it is connected from the pole to the meter box mounted in the wall outside the building, then in the box it is connected to the disconnector in which the BMY is located. Power fuses are 35A, then 3 phases are connected with a cable for protection. in front of the meter, a separate C25A fuse for each phase, then the phases are routed to the measuring system (meter), after the meter there is another C20A protection, but it is still in the meter box, then there is a YDY 5x6mm2 cable, the so-called WLZ (internal power line that is led inside building to the switchboard and in the switchboard I have two C16A fuses, one for the switch, which is run from the switch with a YDY 4x2.5mm2 cable, goes to the engine to the well and draws water, while the second C16 fuse has a YDY 4x4mm2 cable for a power switch, a rectangular one with two push buttons, one with one I turn the button on and turn it off with the other and from this switch there is an old 4-wire aluminum cable which is connected to a metal power socket. From the metal socket there is a black flexible 4-wire 2.5 mm2 cable from the power plug. I don't know what it's called exactly, I think it's it is routed to the switch next to the circular saw, this switch is turned in one direction to the right and from this switch next to the saw there is a cable to the motor, this is what the electricians did for me when I had the overhead connection replaced and they took the meter outside and replaced the fuses for the motors with characteristic C and for an apartment with characteristic B
I described it as precisely as I could, but I have not yet written that there is one single-phase 10A mixing fuse in the switchgear, but that is not what I am talking about now.