Electrical Questions? Ask an Electrician Online.
Hello and welcome to Just Answer. My name is ***** ***** I will be happy to assist you with your electrical question.
1) Kill power at the breaker and back out the 3-way switch from the wall box that you didn't replace. At this 3-way, what are the wire colors that are terminated to the 2 brass screws?
2) How many house wires and the wire colors in the box at the 3-way you replaced?
3) Do you have a 2 wire lead AC voltage tester (a contact type) or a mulit-meter available?
4) What is the approximate age of the home?
1) What is the wiring scheme that was installed? NM Romex cables or conduit or other?
2) Reason I'm asking is that the color codes don't make sense. At the switch you didn't replace, you had 2 blacks terminated to the brass traveler screws. However at the replaced box, you only have 1 black and not 2 blacks?
3) It is is possible that there is another nearby junction box where somebody transitioned the traveler wire colors.
1) It is also possible that 3-ways were Carter or California wired since the home was built in 1918. Not sure if the 3-ways were wired to modern methods when it was updated in 2010? If Carter or California wired, the wiring method is totally different than that of modern 3-way wiring.
Thanks again for the replies and the pic.
1) Since the home was built in 1918, K&T wiring was the only available method at that time. Cater switching for 3-ways was also very common during that era. I suspect yours may may wired using the older Carter method.
See link shown below:
2) Unfortunately, Carter and/or California switching methods are one of my weaknesses and I don't want to steer you in the wrong direction.
Therefore, I am going to opt out of the question and place it back to the open board.
We have another electrical expert here who is very good at older 3-way switching methods. No need to reply back to me, you will be notified once another expert picks up the question..........Thanks:)
Hi, I'm Mike G and I'll be assisting you. Do you have a 2 wire voltage tester?
To troubleshoot the problem you'll need one. The non contact tester won't do. We need to test not guess. Pick one up at any home center and we can continue.