You can not refuse When 3 phases are used in an electrical installation on a phase coupler. It is not designed to improve the coverage but the 3 phases of the Powerline adapter to connect. I have installed the coupler in an existing and unused power supply distribution. Thus, the coupler is extra secure. An improvement could be seen immediately. All Powerline Adapter had connection (4 piece TP-Link). So why only 4 stars? The here on many occasions criticized far too short and not provided with ferrules connections are the reason. In my opinion, the use of terminal equipment (WAGO) would be the better solution.
