Nest Hello Doorbell help

kwedsd · Dec 17, 2018

Hi,

Just about to embark on installing a Nest Hello Doorbell. There isn't a doorbell at the moment (no door bell, no doorbell chime although during the renovation cat 6 cable has been laid ), I have got a 8v-24v transformer (https://www.screwfix.com/p/british-...le/8707p#product_additional_details_container).

1. Is it possible to spur from a double socket, to connect the transformer? I would use 2.5mm cable and place the transformer in an enclosure.

2. Is the cat6 cable suitable to run the 16v-24v load to the nest hello doorbell ?(I'm not going to install a doorbell chime as i'm going to use google Home Minis around the house).

3. When connecting the Cat6 cable to the transformer should I cable in pairs ie. 2 cores into live and 2 cores into neutral (or should I use less cores or more?)

4. Can anyone think of anything that I might not have considered?

Thanks for all your help

SparkyChick · Dec 17, 2018

Hi, welcome to the forums.

1. No, you cannot spur directly, it needs a fused connection unit with a 3A fuse in it. 2.5mm to the FCU and then 1.5mm to the transformer.

2. Personally I would use 8 core alarm cable and double up cores. It's a smaller cable, more flexible and less susceptible to breaking (most Cat 6 cable will be solid core unless you buy the stuff for making patch cables)

3. See above

4. WiFi signal strength by the location of the doorbell unit. Possibly employ a spark to install it, in particular the mains side of things as there are things to consider when taking a spur from a socket (like the socket may already be a spur and you cannot spur from it).

Hope that helps.

kwedsd · Dec 17, 2018

Thanks, for your help. The Cat6 cable has already been run to the door under the flooring previously, as we were going to use a BPT intercom system. The socket is on a ring and hasn't been spurred off. Will defo. use a fused connection helps with isolation, which I didn't consider. I know the Cat6 cable can be brittle and snap, so i'm going to run a small length of 1.5mm cable from the transformer and join to the Cat6 cable using Wago connector blocks that should give me a snug / tight connection and I'll box everything in a din enclosure for tidiness.