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
First reply
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.
Read the full reply2 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? |
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required