Help with fitting fire alarm

Andy1974 · Post by **Andy1974** » Tue Feb 23, 2021 1:56 pm

Can anyone help please!

Removed the old fire alarm (as the plastic bit that holds in place snapped) to replace with a new fire angle alarm.

The wire colours threw me off. Please see pic. I removed the red live wire from the connector. The old wiring is still in place.

: A714B0D9-4A8E-41DC-A45C-FD2CFD34628C.jpeg (268.07 KiB) Viewed 1217 times

The new alarm has Brown (Live), Blue (neutral), white (interlink, i think).

How do i make the new connection?

Someone-Else · Post by **Someone-Else** » Tue Feb 23, 2021 5:39 pm

Not being pedantic, but that is a smoke alarm it is NOT a fire alarm. Fire alarms have a main panel and 24v detectors, you have to be careful otherwise people (insurance) will assume you do have a fire alarm.

Back to your question.

There is no rule that says what colour should be used for what, also you should not mix brands of smoke alarm due to incompatibility issues (not to mention it may go bang)
What you need to do is change all of your smoke alarms to the same brand, then not only is there no compatibility issues, you can decide what wire does what, but you must then use the same configuration on all of them.

Andy1974 · Post by **Andy1974** » Tue Feb 23, 2021 5:46 pm

Someone-Else wrote: ↑Tue Feb 23, 2021 5:39 pm Not being pedantic, but that is a smoke alarm it is NOT a fire alarm. Fire alarms have a main panel and 24v detectors, you have to be careful otherwise people (insurance) will assume you do have a fire alarm.

Back to your question.

There is no rule that says what colour should be used for what, also you should not mix brands of smoke alarm due to incompatibility issues (not to mention it may go bang)
What you need to do is change all of your smoke alarms to the same brand, then not only is there no compatibility issues, you can decide what wire does what, but you must then use the same configuration on all of them.

HI SE

Thanks. There are 2 smoke alarms. I am changing both to the same brand. Thanks for your input.

Blessings.

OnlyMe · Post by **OnlyMe** » Wed Feb 24, 2021 6:05 pm

Well there is as problem with the neutral of the alarm being connected to the earth of the fixed wiring! The yellow is connected to the interlink. Photo of the other alarm removed from it base might help

Andy1974 · Post by **Andy1974** » Wed Feb 24, 2021 9:39 pm

OnlyMe wrote: ↑Wed Feb 24, 2021 6:05 pm Well there is as problem with the neutral of the alarm being connected to the earth of the fixed wiring! The yellow is connected to the interlink. Photo of the other alarm removed from it base might help

I opened up the other alarm and found that earth was blanked and the neutral was correctly connected. So i figured out that in the picture i sent the wiring was wrongly done. I have now connected things correctly. Thanks for your input.