Consultation split choice and electrical installation
Thanks elektomaq.
Taking into account that the 3 teams are not going to turn on at the same time. Can't reach the 2.5 mm2 cable?
I ask because today the installation is 2.5
And if only 4500 frig were installed, what would be the section of the cable and the thermal?
Regards!
The issue is that today you say it is impossible to turn on all three devices at the same time and when the need forces, they will turn them on and will not remember what you said so safely today.
A normal marriage family and a child can without any problem use three computers simultaneously
The idea is that if they can not use more than two so it is for an energy saving issue, but when it is required to use all three for any need, the installation does not suffer
I was touring forums to understand a little more about the subject, since my knowledge is basic.
I happen specifically the situation and then ask you some questions.
I finally bought a Split of 4300 fridges. The other 2 are 2750 and 2250.
What I found out is the consumption in amps of each one. Unfortunately I did not find concrete data but they are opinions in the forums and the intensities would be the following:
4300 frig: 9 amp
2750 frig: 5 amp
2250 frig: 4.3 amp
If we add the 3 it gives us a total intensity of 18.3 amps
(Follow in the next comment)
According to IRAM NM247-3, a 2.5 mm2 cable that complies with that standard admits up to 21 amps
So, to understand, would not reach with a 2.5 mm2 cable that meets the standard to turn on the 3 splits SIMULTANEOUSLY?
I ask you this question to understand how it is determined whether a cable or another is going
Yes ... it could reach, but the other thing that defines the section of the cable to be placed is the thermomagnetic available whose value must be in the middle between the maximum load and what the cable supports
In this case your load is 18.3A and the cable supports 21A. The thermal whose value is intermediate between these two, is that of 20A
Not bad .... but notice that they are very tight values, so I recommend not to have problems with the 25A thermals but unfortunately for this thermal we must increase the cable section to 4 mm2 that supports 28A
In addition to this, the economic thermals, do not have a very accurate calibration so that a 20A could be triggered somewhat earlier. A thermal of 20A under IEC 60898 should operate from 22.6A but those are values assigned by standards that although it should be met, it does not always happen and capable that with 18 A already acts
So if I put 2.5 mm2 with 20A thermal, could I walk?
I ask because the current wiring I have it in 2.5 mm2 (I just need to add the extension to the new split) and if I can send change all that better
What problem could i have? Let the thermal skip by much consumption? Or is there a separate risk? If the thermal jumps I suppose that it should go to 4mm2 and thermal of 25A, but I prefer not to do it "just in case" since I have almost everything done and apart from buying cables and making the change I can also find myself with space problems to go through Corrugated pipes 4mm2 cables
I just see your comment about economic thermals, and it's true, one thing is the theory / norm and another is the pracitca
Just remember that as I put at the beginning, I will never turn on the 3 splits together.
Basically I want to know what risk I run if I try 2.5 mm2 and thermal 20A
If the cable is of good quality, the only risk is that the therma of 20 is triggered, if the cable is bad, we cannot assure that the thermal protects it properly, that would be the only thing to observe but as long as the three devices do not turn on simultaneously, I don't think you have any problems
Reparaciones similares solucionadas
¡Aprende a reparar con estos cursos YoReparo!
