I just bought a duplex and have a problem with the wiring of th
doorbells. When I moved in, the doorbell for the 1st floor worke
fine. The doorbell to the 2nd floor rings the doorbell for the 1s
floor and the second floor. I've figured out the wiring and what i
going where. I can get the doorbells to work fine if I only hook on
up at a time. However when I hook both up at the same time, only on
will work. Do I need 2 transformers if I'm operating 2 differen
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A) Are you hooking up the doorbells in series with EACH OTHER as well as in
series with the button when you should be hooking them up IN PARALLEL WITH
EACH OTHER and in series with the button?
B) Your transformer may not be powerful enough. You don't need two-just a
more powerful single transformer.
Hope this helps,
The heftier transformer might be needed only if two parallel loads were
imposed simultaneously; very unlikely.
It seems apparent that the petitioner has wired his duplex in SERIES, rather
than PARALLEL. Another writer has offered good advice, but I suggest the
petitioner get help from someone close-at-hand if he can't discern the
x | |
xfmr Switch Switch
x | |
| Bell Bell
So that's a crude schematic of the needed parallel arrangement.
Those doorbell switches are "N.O." (normally open) momentary switches. The
petitioner might try to have both pressed SIMULTANEOUSLY, given his present
wiring, and listen for both bells ringing simultaneously. This would
confirm a SERIES wiring, obviously incorrect for the desired result.
The wiring should be as follows....120vac to the transformer....transformer
output to switch one and switch two with doorbells coming off both switches
and the return circuit for both switches going back to the return circuit of
the transformer. What you currently have hooked up would have to be
explained further to figure an "easy fix"....but that should be the
configuration that would work for you. Best of luck in your project....Ross
After giving this a little more thought it appears you have your switches in
paralell and the bells in series. the apparent fix is to take the hot side
of the bell upstairs and move it to the hot side of the bell downstairs or
just reverse your bell connections downstairs that are tied in with the bell
upstairs. John's schematic shows how it should eventually be wired....Ross
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