Install Nest (3rd Gen) wiring question

Joined
1 Jan 2019
Messages
5
Reaction score
0
Country
United Kingdom
Rolling up sleeves and installing the Nest thermostat we treated ourselves to for Christmas.

Attached some screenshots of previous and new wiring to check before switching it back on.
Anyone able to cast an eagle eye over these to make sure looks right?

Black wire is boiler and White wire is mains.
Both N wires into N (only mains was connected before).
Both Earth into Earth (these were not connected before).
Mains L into L
Boiler L into 3
Loop wire connecting L to 2

Does this look right?
 

Attachments

  • IMG_7199.jpg
    IMG_7199.jpg
    173.8 KB · Views: 290
  • IMG_7194.jpg
    IMG_7194.jpg
    150 KB · Views: 282
  • IMG_7198.PNG
    IMG_7198.PNG
    143.7 KB · Views: 290
Sponsored Links
Joined
6 Jun 2018
Messages
96
Reaction score
17
Location
Buckinghamshire
Country
United Kingdom
Have you verified that the blue core in the black sheathing is actually a neutral? If what you deduce is correct then I’m baffled as to how the boiler operated when missing a neutral.
Have you stocked up on 3 amp fuses.
April fools day already? Hopefully you’ll get around to securing the unit to wall.
 
Joined
1 Jan 2019
Messages
5
Reaction score
0
Country
United Kingdom
Have you verified that the blue core in the black sheathing is actually a neutral? If what you deduce is correct then I’m baffled as to how the boiler operated when missing a neutral.
Have you stocked up on 3 amp fuses.
April fools day already? Hopefully you’ll get around to securing the unit to wall.

The other end of the black sheathed wires are deep in the bowels of the boiler! No idea why it wasn't attached but boiler has been working so far (last two years, system was installed when we moved into the property). Plenty of fuses on stand-by!
 
Sponsored Links
Joined
1 Jan 2019
Messages
5
Reaction score
0
Country
United Kingdom
Set-up seems similar to that posted on this video (eg no earth wires and no neutral into boiler) …

 
Joined
1 Jan 2019
Messages
5
Reaction score
0
Country
United Kingdom
yep, the neutral is capped off inside the boiler so is just running live
 
Joined
6 Jun 2018
Messages
96
Reaction score
17
Location
Buckinghamshire
Country
United Kingdom
Set-up seems similar to that posted on this video (eg no earth wires and no neutral into boiler) …

...and you listen to someone who uses a neon when testing for voltages?
So your boiler has been working fine utilising only the brown core as shown above in your opening post?
 
Joined
1 Jan 2019
Messages
5
Reaction score
0
Country
United Kingdom
Hey

Cracked on and all seems to be working as normal. I didn't blow up the kitchen (or a fuse)!

Thanks for help,

Cole
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Sponsored Links
Top