My smoke detectors have 3 wires coming out of them.
Black, white, and yellow.
Black and white fr 110VAC and the yellow for interconnectivity.
All I see discussed is 2 and 4 wire.
Would someone please unconfuse me?
2,3,4 wire smoke detectors?
Jul 17, 2007
8 Replies
2 and 4 wire smoke detectors as referred to in this group, are low voltage devices used in alarm installations. The one's you are talking about are 110vac units.
Thanks,
Do low voltage 2 and 4 wire smoke detectors also have battery backup?
Do any 2 or 4 wire units have battery backup?
They are powered by the alarm control, which has a battery backup. There are no batteries in the detectors themselves. js
Technically, they all do. The battery is in the alarm control panel.
Do any 2 or 4 wire units have battery backup?
it would be weird if they did
| > > My smoke detectors have 3 wires coming out of them. | >
| > > Black, white, and yellow. | >
| > > Black and white fr 110VAC and the yellow for interconnectivity. | >
| > > All I see discussed is 2 and 4 wire. | >
| > > Would someone please unconfuse me? | >
| > 2 and 4 wire smoke detectors as referred to in this group, are low | > voltage devices used in alarm installations. The one's you are talking | > about are 110vac units. | | Do any 2 or 4 wire units have battery backup? |
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