This is a breach of 2 buttons that allows you to switch off and on 2 lamps independently. The fasedraad becomes coupled to the P contact point, which is attached to the contact point to the other coupler.
Tani waa jebinta 2 badhamada in kuu ogolaanayaa inaad beddelato iyo off 2 laambadaheedii si madax-bannaan. fasedraad The noqdo xidhay inay dhibic P xiriir, kaas oo ku lifaaqan dhibic xiriir si coupler kale.