What rating ?
I have to finish it asap i don t have any more power to start again
No, its not rated for more than 125V DC
Also the clearance and creepage distances for mains are much larger than the spacing between the pads on the prototyping board.
Just love the double-sided tape! 
“Ethernet wire” is usually 24ga or thinner, btw…
I see some rated for 300V, though.
I don't doubt you (as I've seen many of your previous posts) however the insulation on CAT cable individual wires is pretty thin. Might the 300V rating be for the outer jacket?
I wouldn't want to give the OP the impression they can use Ethernet cable for 220V.
I won t use it, i already used a good one stranded 0.75mmp but now comes the problem of neat disipation. As i orientated the relays on the side and the pins are not on the pcb they can t radiate heat efficiently and the relays get hot without load pretry quickly
Could be, so you could mix it with mains wire inside trunking etc.
That's worrying - they shouldn't really heat up much.
Honestly, I think you need someone qualified who knows all the rules for building mains-powered equipment. That isn't you. (Nor is it me, I hasten to add.)
You really need to walk away from this project. You don't want death or injury, or even just a nasty shock, on your conscience.
How hot is hot?
My rule of thumb is:
can touch and hold your finger on the device ~ 50 deg C
can touch but feel the need to remove your finger ~60 deg C
If touched and you immediately have to pull your finger away ~ 70 to 100 deg C
If you can see the lettering from the device in you skin after removing it from the device its well above 150 Deg C.
They are not that hot, they just got warm and i can hold my finger as long as i want but they heated up to fast i believe withing 15 minutes. Also i have an hc05 on the board powered by an asm1117 5v regulator that get 9v in and it also gets hot after a while but it is way hotter than the relays and the buck converters coil and regulator
My concern is that if it in standby mode when it is supposed to do nothing , gets that hot withing 15min, how am i gonna let the board run continuously for months? On the hc i just added some caps at the input, i believe they aren t the cause ?
That picture... you really made it as compact as possible, didn't you?!
Just looking at this convinced me - you should disassemble the whole thing and forget about this project before an accident happens.
I can remove the hc module, the level converter and leave the rest and rotate the relays
I wouldn’t out any power through that soldering…
What voltage is on the red wires connected to the relays ?
12v+
Did you know that electrical safety regs in most of the western world require that a technician is protected against electrocution even when the case is open. Putting this lot into a plastic box - apparently making it safe, in your mind - won't cut it.
I'm not going to make any more posts in this thread, and I'm going to finish by making a very blunt statement, which is not intended to be rude, but to rather to emphasise my point:
You don't have enough skills or knowledge to incorporate mains voltages in any device you've made. Put that device straight in the bin and forget about this project.
This is what I've done in the past, a good 10mm gap
Your creepage and clearances are not sufficient for 220V mains, not even slightly, you have a death-trap there.