Guest viewing limit reached
  • You have reached the maximum number of guest views allowed
  • Please register below to remove this limitation

Earthing question

D

Dannyhack

DIY
Good evening everyone :)

I am planning on switching out an old plastic face plate for my extractor fan in the bathroom.

The new one will be metal rather than plastic. I have attached a photo of the current wiring.

Am I right in thinking that the two earth cables that are currently going to the backbox will need to be attached to the front plate? And then a second earth cable then runs from the face plate to the backbox?

Any help would be greatly appreciated :)

Dan
 

Attachments

  • IMG_0340.jpeg
    IMG_0340.jpeg
    1.6 MB · Views: 17
playing the devils advocate,
do they need to go to the front plate? I have never seen a conductive faceplate that doesn't have an earth connection between the screws and the face. (screws being earthed by the back box)

their is of course the possibility that I might be a little bit to much under the influence to give genuine advice but the question still stands.
 
westward10 said:
Yes they do.
Click to expand...
Interesting.
So its ok to attach the earths to the face plate and let the screws earth the metal back box (exposed conductive part),
but not ok to earth the metal back box and let the screws earth the faceplate, which is also an exposed conductive part?
 
HappyHippyDad said:
Interesting.
So its ok to attach the earths to the face plate and let the screws earth the metal back box (exposed conductive part),
but not ok to earth the metal back box and let the screws earth the faceplate, which is also an exposed conductive part?
Click to expand...
I completely agree with @westward10 - it is never acceptable to rely on the lug/screw to Earth the faceplate. However I would always advocate connecting both to the faceplate and connecting a separate core back to the backbox even where it isn't required.
 
Risteard said:
I completely agree with @westward10 - it is never acceptable to rely on the lug/screw to Earth the faceplate. However I would always advocate connecting both to the faceplate and connecting a separate core back to the backbox even where it isn't required.
Click to expand...
Amazing, thanks for your help. In terms of adding an additional cable from the box to the face plate, what wire would I need? I would of course place the green and yellow sleeving over the top, I'm just not sure on what type of cable I would need. Thanks again for your help.
 
If you have at least one fixed lug you dont need it,which it appears you do have.
You can use a 1mm or 1.5 mm cpc /earth coloured green and yellow,it won't harm anything and would keep the back box earthed if anyone removes the front, this is not recommended while live
 
westward10 said:
Yes.
Click to expand...
Come on Westward, expand a little? I value your knowledge due to your experience, so it's good to hear the reasoning.
I'm guessing it's because the faceplate is touchable where as the back box isn't. They are both exposed conductive parts though, so I can't see BS7671 treating them differently.
 
Risteard said:
I completely agree with @westward10 - it is never acceptable to rely on the lug/screw to Earth the faceplate. However I would always advocate connecting both to the faceplate and connecting a separate core back to the backbox even where it isn't required.
Click to expand...
Same question as I've posted to westward, risteard. Do we treat the faceplate and back box differently? I realise the difference is obvious. One is touchable and one isn't, but they are both ExpCP's.
 
Best EV Chargers
Best EV Chargers by Electrical2Go! The official electric vehicle charger supplier.

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Advert

YOUR Unread Posts

Daily, weekly or monthly email

Receive a daily, weekly, or monthly email containing a digest of new and recently updated threads.

Thread starter

D

Dannyhack

DIY
Joined
Location
Edinburgh
If you're a qualified, trainee, or retired electrician - Which country is it that your work will be / is / was aimed at?
United Kingdom
What type of forum member are you?
DIY or Homeowner (Perhaps seeking pro advice, or an electrician)

Thread Information

Title
Earthing question
Prefix
N/A
Forum
UK Electrical Forum
Start date
Last reply date
Replies
15

Thread Tags

Tags Tags
None

Advert

Thread statistics

Created
Dannyhack,
Last reply from
Risteard,
Replies
15
Views
226

Advert

TrueNAS JBOD Storage Server

UK Tiling Forum | Tilers Forums
UK Tiling Forum by Tilers Forums UK
Plumbers Forums | Plumbing Advice | Gas Forum
Electrician Tips from Professional Electricians
JBOD Forums: a forum for JBOD storage server advice
JBOD Suppliers: JBOD Storage Server Supplies
Back
Top