How do you wire a new switch in box two of diagram #3 below? Can't seem to get constant power.
Lets make sure I understand the question. Diagram #3 has constant power entering the top box and terminating on the common terminal of a 3 way switch. It goes no further than that point. Please note that the neutral does go between boxes - it should be a white wire and does not terminate on either switch.
Power is achieved in the lower (box 2?) only via the traveler wires going between switches. With the light fixture wired to the common terminal of the second switch power is delivered to the fixture only when the power can pass through the first switch to a traveler wire, then to the second switch, through the second switch to the common terminal of that second switch and on to the fixture.
Each switch box should have a 2 wire (plus ground) cable plus a 3 wire cable entering the box. The light box should have only 1 two wire cable, unless there are additional light boxes and fixtures running off of the same switch, whereupon there will be additional cables in the light box. One of the 2 wire cables in a switch box is constant power - if this is not the case then diagram #3 most likely does not apply.
At least one switch box MUST have constant power, but it is not unusual to find only one of the switch boxes with that constant power. If both switch boxes has constant power, that power passes through one box without terminating on the switch there; It is NEVER the case that BOTH 3 way switches have constant power terminated on the switch. The common terminal on one switch is constant power, while the common terminal on the other switch goes to the light fixture.
Diagram #3 is what I have. I am trying to wire in a new light fixture out of the second box (lower box) and am trying to get power to it irregardless of which way the 3-way switches are toggled. Is this possible or do I have to run a separate power wire to the second box for this new fixture.
I am sure you have solved this by now. But here is my 2 cents worth. When you have 3-way switches (lets say two) and one light fixture, power resides in one of these boxes. Either the light or one of the switches. You can only utilize the power that resides in the box which has it, you cannot transmit power and neutral to the other 3 way switch or from the light if that's where it is at. You don't have enough wires and still maintain the multiple switches to operate the light.
All of this is determined by the electrician who wired it in the first place.
by Drewcephus 8 years ago
Diagram #3 is what I have. I am trying to wire in a new light fixture out of the second box...(lower box) and am trying to get power to it irregardless of which way the 3-way switches are toggled. Is this possible or do I have to run a separate power wire to the second box for this new fixture?
by Liz Elias 6 years ago
How do you wire a half-hot outlet?Can such an outlet be fed from an existing wall switch, or would I need to replace the switch with a duplex switch, one for the existing ceiling light and the second for the half-hot? In either case, would I need a "traveler" such as with a 3-way...
by Drewcephus 8 years ago
I already have the double box and the wire to the new fixture in the lower box. Was hoping to...get power from the 3-way source, but now I will just run another power source to it. Thanks for the help!
by GracieZG 7 years ago
How do I wire old ceiling light where all wires are the same color in the light AND ceiling box?There are three identical copper wires in the ceiling outlet, all with white plastic sheathing. Two are twisted together, the third is alone. The old swag light we want to hang for now (until we can...
Copyright © 2019 HubPages Inc. and respective owners. Other product and company names shown may be trademarks of their respective owners. HubPages® is a registered Service Mark of HubPages, Inc. HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.
|HubPages Device ID||This is used to identify particular browsers or devices when the access the service, and is used for security reasons.|
|Login||This is necessary to sign in to the HubPages Service.|
|HubPages Traffic Pixel||This is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.|
|Remarketing Pixels||We may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.|
|Conversion Tracking Pixels||We may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.|