"Mark Lloyd" wrote in message
...
On Sun, 3 Aug 2008 22:37:56 -0400, "RBM" wrote:

[snip]


If it's a low voltage switching system, there will be at least 3 wires on
the switches. Common- On-Off


Don't they make toggle relays? Those would work with just 2 wires
(alternating on/off with each current pulse).

[snip]

--
Mark Lloyd
http://notstupid.laughingsquid.com

"Properly read, the Bible is the most potent
force for atheism ever conceived." -- Isaac Asimov

That's how a ratchet relay works, but this is a system designed by GE, and
uses cylindrical latching relays that have an on circuit and an off circuit