Nest Hello wiring sanity check

Semple · 6 Feb 2020 at 16:17

Installing a Nest Hello, but the house did not have an existing doorbell in place, so starting from scratch.

So from reading/watching install guides and wiring diagrams (it's quite a minefield!!). I've got the below theoretically drawn out:

The Nest Hello says it requires an 12-24V AC 8AV transformer, of which the BG bell transformer is 8-24V AC 8AV.

Before i buy the bell transformer and door chime, anyone able to confirm if my wiring above would be fine?

TIA!

Semple · 6 Feb 2020 at 17:46

I had contemplated getting just a plug-in transformer, but would make the install a little messy. At least with the above i could hide it away near the consumer unit.

Semple · 10 Dec 2020 at 13:42

rubberduck said:
Did this wiring work?

It did indeed, it's been running fine ever since.

The transformer and housing i picked up from Screwfix, and i think i got the chime box off Amazon.

Semple · 8 Mar 2021 at 23:00

David Flett said:
Could you link the transformer and housing you went with? I'm away to install my one but the chime box I have has a built in transformer, not sure if that'll make it trickier on not, maybe just get the chime box to and copy your wiring, the nest pro wants £169.99 to do the install.

Did you just use the main power going to the chime box and put them into the transformer, then which wire did you use to go from the transformer to the chime box? Just 2 Core?

Had a quick look do these look about right

<snip>

Just noticed few month old thread

They look similar to the ones i have.

It looks like Screwfix still sell the transformer: https://www.screwfix.com/p/british-general-8-24v-8va-bell-transformer-module/8707p?_requestid=724359

And the enclosure: https://www.screwfix.com/p/wylex-ese2-ip40-2-module-unpopulated-din-enclosure/32311

Assuming the transformer gives out the correct voltages in your chime box, then that may work. But luckily enough the above transformer and enclosure are less than £13, so not a huge difference.

I think the chime box i bought from Amazon.

I used a 2 core wire going from the fused switch to the transformer. The wire from the transformer to the chime box was much thinner as it's only carrying 12 volts, but any 2 core wire should work fine.

£170! Oooof! I'm not an electrician, and would say i'm reasonably confident with basic DIY electrics, and this was very easy to do.

Semple · 9 Mar 2021 at 10:13

David Flett said:
OK thats perfect ill give it a go, unfortunately my chime box transformer only puts out 8v, the electrician/nest pro said its the same everywhere in UK as google hello is American and they use more power. He must have been charging for the chime,transformer and the install but I didn't even ask for a breakdown.
Can pick up 50m of doorbell cable from screwfix for a few pounds.

Well it just makes logical sense that to power the camera will require much more than a basic push-button doorbell.

Semple · 17 Mar 2021 at 08:09

David Flett said:
On there app how much events are people getting?
I got 1159 yesterday, does that seem about the same? Mostly all 5 second videos of the wind, is it really that sensitive? only asking as I set it up on her iPhone for her and she's ended up with a notification every timewasn't best pleased yesterday haha.

In notifications you can switch off sound activity.

There's probably only a few cases where people can get sound detection to actually work accurately.

Semple · 17 Mar 2021 at 16:37

David Flett said:
Thanks ill have a look, it would have handy to have if it wasn't all videos of wind. Are the nest app notifications per device or device wide? I have it off on my phone and don't get but I'll check the Mrs iPhone once up

I believe it'll notify every registered user unless you set some local change to turn notifications off.

I know notifications come through on both mine and the missus phone.