The cable has been lying to the house for 3 years,
the person calculating is not a desk worker, and the summed maximum load was assumed to be 70%.
There are increasingly devices that react to voltage drop by switching off.
The cable has been lying to the house for 3 years, the person doing the calculations is not a desk jockey, and the summed maximum load was assumed at 70%. There are increasingly devices that react to voltage drop by switching off.
That there are household appliances with undervoltage trip is new to me. A quick search yielded nothing. And you will not reach 70% of the nominal load in hundreds of cold winters. With a 50 sqmm supply cable, about 160 A / 50 kVA can be brought into the house. That is oversized by a factor of 3 for a single-family house. The voltage drop is completely negligible, especially since network operators now tend to a higher network voltage of around 235 V anyway. I stick to my opinion. Your consultant meant well. But your cable is completely oversized.