Split electrical installation !!
That's right, put 25 amper thermal, the equipment is 20 meters from where the thermal came with 2.5 mm2 cable (poor quality), for me it is bad, so I asked what it is that corresponds considering the number of meters of cable and voltage drop
In the thermal one there are 215 volts, with the equipment working in the terminal of the same one there were 200 volts.
According to calculations, placing conductors of 2.50 mm2 gives a voltage drop of 2.38%, of course we must talk about first-line conductors, if you put poor quality conductors that calculation does not count
The 25A thermal is not suitable for any 2.50 mm2 conductor
Actually with 2,50 mm2 and 20A thermal conductors you can go, but the ideal is 4 mm2 with 20A thermal
They do these things without advice, the equipment cuts low voltage on hot days, it is recommended that they correct the installation and then take measurements again.
Your observation is correct, the main thing in electricity is to use standardized and approved material which will ensure that a conductor that claims to be 2.50, is really 2.50 mm2 of real copper and not painted metal
Now beware ... a voltage drop is not only generated by the wiring, it is also generated by its different connections and splices and although they have the best cable, a false contact can make disasters
In conclusion, the cable if it was of good quality is not bad, the thermal instead. Many use the thermal of 25 as a workhorse and put it to c
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