replacing class 2 fitting, no visable earth. | on ElectriciansForums
Click here to remove these ads

replacing class 2 fitting, no visable earth.

Post new thread

Discuss replacing class 2 fitting, no visable earth. in the UK Electrical Forum area at ElectriciansForums.net

I

ianphilip007

-
Joined
Jan 21, 2011
Messages
581
Reaction score
57
Hi all need a little clarification.

Customer wants ceiling light fittings x 2 replaced with class 1 fittings. Lighting circuit is earthed at C.U. and class 1 wall switches, and at one of the lights. There appears to be no earth at the second light( just x2 black singles & no sign of the loop). Note both lights are in same room about 3meters apart but are switched seperatly. I have not been into the loft as of yet, there may well be a junction box_ containing the earth & loop. If so no problem.

If no earth is present I plan to extend the earth from the other light point ( same lighting circuit)

if I have understood the regs correctly the min size CPC will be 4mm with no mechanical protection or 2.5mm with mechanical protection. Would hate to try and terminate 4mm into a light.

Note only 3 meter straight run so conduit/trunking to provide mech protection.
 
Sort by date Sort by votes
if the singles are fed from jb above which contains loop and earth then i agree simple to replace with 1.5 t+e. But if not then 2.5mm earth (mech protected) from other light fitting would be acceptable way of earthing the class 2 fitting. Yes ?
 
Upvote 0 Downvote
just been scrubbing hands again. getting resin traces off fingers from yesterdays SWA jointing job. hate then joints. seen one at elex which is pre-filled gel, but lost the firm's contact details.
 
Upvote 0 Downvote
ianphilip007 said:
the question was about the size of CPC and mechancial protection required if a seperate earth needed to be run to the lighting point. i am well aware of the other options.
Click to expand...
Yes if it is mechanically protected then fine, but if you installed a metal conduit between lights it would need to be connected as well wouldn't it? I think as it has the loft above it then just put some T&E between, any spark would do the same, it is easy and the best way. If there is existing containment in place and it tests out then yes add an earth between.
 
Upvote 0 Downvote
Pls note the two lights in the kitchen are switched independently,2 different switch wires from 2 seperate switch plates in different locations. i am unsure of the configuraton of unearthed light points wiring, as i have not yet been into the loft space above. All that is visible is 2 black unsheathed wires one maked Live one marked neutral. No Earth visable.

So as stated if there is a JB containg the Switched live Neutral and Loop for this lighting point in the loft space. then replacing the singles is simple with 1.5t+e

I really was just checking the cpc size for linking a seperate earthing conductor, if no local JB is present, and switch wire is wired directly to the switch plate. as customer wants not decoration damage.

Pls note the existing singles do not run between the lights.
 
Last edited:
Upvote 0 Downvote
ianphilip007 said:
Why Metal Conduit ?? surely PVC or YT2 trunking would provide satisfactory protection for the earthing conductor in a loft space.
Click to expand...

A cpc rather than the Earthing conductor. PVC conduit or trunking is fine as long as it is continuous (which metallic would also need to be), which may not be achieveable without starting again.
 
Upvote 0 Downvote
here you go, mike.:

[ElectriciansForums.net] replacing class 2 fitting, no visable earth.
 
Upvote 0 Downvote

Reply to replacing class 2 fitting, no visable earth. in the UK Electrical Forum area at ElectriciansForums.net

Similar Threads

S
  • Question
Consumer unit MCB selection
What is the distance from the point outside the house to the shed?
Replies
8
Views
646
KungFuTurkeyLeg
KungFuTurkeyLeg
O
  • Question
2 circuits in one cable.
We just left it as it was, again the customer didn't seem too bothered, dont think she wanted me digging any further.
Replies
14
Views
1K
oscar21
O
H
Class II fitting modified by Electrician
I find with these so called 'class 2' metal light fittings which are basically class 1 fittings with a crappy supposedly double insulated joint...
    • Funny
    • Like
Replies
20
Views
3K
Welchyboy1
W
B
  • Question
UK Is a standard Pendant a Class 2 fitting?
I completely agree. In real-world terms it will become less and less of an issue, as long as the lamp isn't broken exposing live parts.
2 3
Replies
66
Views
8K
Risteard
Risteard
O
  • Question
Are solar panel inverters tied to earth?
I've done the board change on this now, what a lash up it was before, old 16th board hacked into a dual RCD one, think they have taken the main...
Replies
7
Views
1K
oscar21
O

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

YOUR Unread Posts

Tilers Community
This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
NHS Forums | Forum for NHS Staff and NHS Patients
Back
Top
✖
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock    No Thanks