3 Way Switch Power At Switch. Depending on where the switch will be in the circuit layout, the purpose of this common connection is to deliver electrical current from the power source. Use a continuity tester or multimeter on the Ohms setting to.
Three-way switches & light fixture with duplex receptacle. Of the three circuit terminals, one is called the common Turn off the power and remove the switch from the circuit by disconnecting the wires. Depending on where the switch will be in the circuit layout, the purpose of this common connection is to deliver electrical current from the power source.
Power comes in at the first fixture.
Then there was a white wire taped black that was wired to switch B and went to the light.
Step Five While a three-way switch is very simple to many who visit Instructables.com, it is a mystery to many others. Three-way light switches are ideal when you need to control lights from two locations. Using a continuity tester, check continuity between the common (black) terminal.