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three lights, two switches
On Mon, 20 Feb 2017 08:51:23 -0800 (PST), trader_4
wrote: On Sunday, February 19, 2017 at 3:37:15 PM UTC-5, Mark Lloyd wrote: On 02/18/2017 08:38 PM, wrote: On Sun, 19 Feb 2017 07:49:16 +0630, Chuck Jacobs wrote: I have three lights A, B, C and two switches 1 and 2. How do I wire them so switch 1 turns on/off A and B and switch 2 turns on/off B and C? Please note that B is controlled by both switches, kind of like a 3-way switching. Would there be any problem if both switches are on? The easy way is to put a fixture with 2 lamp holders in the B position and wire one to A and the other to C. If you are willing to run a lot of wire I imagine we can come up with a way of doing it with one light in B I would accomplish the same thing by using double-pole switches rather than 2 lights at B. One pole of each switch for B, the other for A or C. Note that neither is the same as 3-way. In one of these setups, you get light at B if EITHER switch is on (1 OR 2). Which doesn't give him what he wants. The B light can be on and not responsive to the switch in one of the two locations. It's Philo's initial idea, which as he figured out, doesn't work. Since he has two bulbs in the B fixture, if he can live with one bulb for each circuit, that's the only solution I see so far that does what he wants. That's the one that Gfre came up with. If you are willing to use solid state switching or "RR" series relays, there are lots of options. Otherwise you will need 2 pole switches and lots of wire. If the power is sourced in the "B" enclosure, the solution is the easiest but you are still running "4 wire" to each double pole switch to be legal in the 2014 code. (you need a neutral, even if it is just a switch loop) |
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