Yes. You have 2 wires (plus ground) coming from the previous switch in the circuit and 2 wires (plus ground) going to the next switch in the circuit. If you have a neutral, or if you have a switch leg, which would be the conductor from the last switch in the circuit to the equipment being powered, you will need 3 or 4 conductors (plus ground).
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No, a four-way switch requires three or more switches to control a single light fixture from multiple locations. Each switch in the circuit needs to have three wires - one hot wire, one traveler wire going to the next switch, and one traveler wire coming from the previous switch. Using two pairs of two-wire cables will not provide the necessary connections for a four-way switch setup.
You can wire 4 lights with 2 switches by creating a "three-way" switch circuit. Connect the power source to the first switch, then run a 3-wire cable from that switch to the second switch. From the second switch, run a 2-wire cable to each of the 4 lights. This allows you to control the lights from either switch.
To wire two bulbs to one switch, connect the live wire from the switch to the live terminal of the first bulb. Then connect a wire from the live terminal of the first bulb to the live terminal of the second bulb. Finally, connect the neutral wire from the switch to the neutral terminals of both bulbs. This setup will allow the switch to control both bulbs simultaneously.
The two way switches work in pairs. We find most of them in our houses where the light bulb can be operated by two switches each at the far end to the other. Each switch consists of three terminals two of which are connected. When one switch is open and the other is closed then the bulb glows and viceversa
A 14-3 wire can be used to connect a switch and power source by assigning the red wire as a traveller wire between two switches, the black wire as the hot wire, the white wire as the neutral wire, and the ground wire as the grounding wire. This configuration allows for a two-way switch setup.
One 3-way dimmer switch, one regular 3-way switch and one 4-way switch. The 4-way is wired between the two pairs of travelers from the other two switches. The common on the dimmer is tied to either the light or to the branch hot and the common on the other 3-way is tied to whichever is left (hot or the light).