Ok .,
On European side not too long ago { it already posted in other electrician fourm } found total of 30 hidden junction boxes
and quite few ring circuits { they are illegal in France } with 1.5mm { 16 awg } conductors with 32 amp breaker now that is way out of wack!!
On USA side .,
Got a farm house wired up with mixed bag of POTS and Zipcords and 4.0mm˛(*12) for electric stove end up rewired the whole place.
Merci.
Marc