Pierre looked at the instruction manual. It was a confusing diagram of lines and symbols. He looked at the wires protruding from the wall: a Brown wire, a Blue wire, and two others that looked like Black and Grey.
Secteur 230V ~ L (phase) -------> Récepteur (L in) N (neutre) ------> Récepteur (N in) et ----> Moteur (Bleu / commun) Terre ----------> Terre moteur + Terre récepteur branchement volet roulant 4 fils radio
"Okay," Pierre said, trying to sound confident. "The Brown is Phase. The Blue is Neutral. That’s standard." Pierre looked at the instruction manual