Hello, good night, I have a question, previously I installed a simple single-phase board in my house, and now I want to improve and remodel the three-phase system of a family member, since when they use their electric heater, the leads fly when they use the heater electric. (It is 5500 watts and 30 A) (Once at two months or a month, they flew and changed it, but now as soon as they use it, the general leads fly) The cables have not put (mostly) with the colors that distinguish the neutral and phase. All cables are 12 AWG, except the one that comes from the general light meter that are a bit thicker, it looks like 10 AWG. Currently the board is like this (as in the photo): the general one with a 3x30A switch (the switch is old and the screws that hold the leads are loose), without differential, and hence 3 keys that are for the outlets (2x32A ), the lighting (2x40A) and the heater (it is placed in the bathroom and is 2x20A). I think there are 2 options for which you fly: 1. The capacity that they put in the heater switch is wrong, they put it 2x20A when the heater is 5500 watts and 30A (so it says in its description of the heater). And this leads to the flow of lead, even more so than the general one is only 3x30A. 2. The general 3x30A, must be of more capacity and must be changed, as they are old and already very loose. Taking advantage of the question, I also want to remodel the board, in this way: the general one of 3x40A, without differential at the moment, 2x32A outlet (the total use at home adds about 26A), lighting of 2x25 and the heater to one of 2x32A I plan to place the same order of the cables in the photo, if you have any recommendations for this. I would appreciate it, since it is totally the one of single phase. Thank you for your time. [Img] https://adjuntos.yoreparo.com/imagen_post/0004/50/d8065a5d902295d81e1e79207c143eff15ba5264.jpeg [/img]

Dante In the title you speak of three-phase board. Then you say that you are not sure if the wires that enter are 3 phases or 2 phases and neutral. I do not understand how you can project something what you want to do, if you do not even know the provision of feeding phases .. ??? You must measure the tension between the 3 wires that enter the house. Wearing a glove and lowering the thermomagnetic is not enough to do the job, knowledge and practice are required. My opinion is that you should let a professional do the work.

good day , In Peru it is usually 220vac, apparently the red wire that enters the “three-phase” switch would be PHASE, but you have to confirm it with a tester or failing that with a pager, it would be advisable to change that switch (it is a danger ). if the lead flew and not the previous thermals, the capacity of the lead wire is much less than 32 amp of your thermomagnetic (outlet), you have to find out the actual consumption of your circuit and based on that buy the main theme.