I have an L-shaped hallway with 2 ceiling lights.
A 3-way switch is located at the end of each leg of the "L". Each electrical box has: A sheath with a black wire and a white wire. A different sheath with only a black wire. What wire gets connected to each terminal on each 3-way switch?
A 4-way switch is located at the intersection of the legs of the "L". The electrical box has: A sheath with a black wire and a white wire. A different sheath with a black wire and a white wire. What wire gets connected to each terminal on the 4-way switch?