CU change--no cpc to lighting ccts.

Help Support Talk Electrician Forum:

dave2

Well-known member
Joined
Apr 14, 2008
Messages
239
Reaction score
0
Location
Co.Durham
Today I have changed a cu and all is well apart from the following

1. No cpc to lighting ccts

2. Borrowed neutral to landing light.

When filling in an EIC how can I possibly fill in the R1+R2 columns?

Any easy way to get round the borrowed neutral to the landing?

All the light switches are in metal back boxes. Should the switches be class2?

Dave

 
Joined
May 7, 2008
Messages
11,441
Reaction score
429
Location
Sunny Plymouth
Can't do R1+R2, but can still do Line and Neutral so test that, and annotate cert to say so, or annotate to say limited testing only due to no earth.

All accessories should be class 2, but don't think that includes back boxes, plus assuming new CU has full RCD protection, you have supplementary protection (think that's the right phrase) in place.

Borrowed neutral needs sorting.

 

The Godfather

Retired
Joined
Mar 24, 2008
Messages
1,302
Reaction score
0
Any easy way to get round the borrowed neutral to the landing?

Dave
Connect both lighting circuits onto the same MCB, treat as one circuit.

The Godfather

(If remedial work is out of the question)

 

The Godfather

Retired
Joined
Mar 24, 2008
Messages
1,302
Reaction score
0
I might add the 17th edition CU, is certainly going to find this old practice of the Landing light.

Don

 
Joined
Feb 27, 2008
Messages
11,034
Reaction score
0
Today I have changed a cu and all is well apart from the following1. No cpc to lighting ccts

2. Borrowed neutral to landing light.

When filling in an EIC how can I possibly fill in the R1+R2 columns?

Any easy way to get round the borrowed neutral to the landing?

All the light switches are in metal back boxes. Should the switches be class2?

Dave
I did similar job a few weeks back. Luckily lighting did not have borrowed neutral on landing. Boxes where wooden and there where no metal light fittings in property. I noted on cert that could not test loop due to no cpc. I gave customer copy of electrical safety council booklet about propertys with no cpc. You also have to put sticker on consumer unit about not putting metal fittings up. These are available from NICEIC.

batty

 

Admin1

Forum Founder
Joined
Feb 6, 2008
Messages
10,278
Reaction score
-1
You also have to put sticker on consumer unit about not putting metal fittings up. These are available from NICEIC.batty
They are rather costly from there too. :(

But...

You can have them made up from "The Labelpeople" for far less. I even have a "

 

Admin1

Forum Founder
Joined
Feb 6, 2008
Messages
10,278
Reaction score
-1
Interesting, Steps. I don't know who that is or I would have PM'd the person in question to see if they wanted to do as you suggest, above, Mate.

 

springcrocus

Well-known member
Joined
Jul 3, 2008
Messages
596
Reaction score
-1
Understatement of the firkin century.........Admin - THE vet needs a distinguished title.....

Sensible suggestions please guys...

"post-finder general" springs to mind, but that has connotations of witch-hunting??????
How about Apache changes his avatar to a mole? They are good at tunnelling :^O :^O;)

 

ian932

Senior Member
Joined
Oct 13, 2008
Messages
889
Reaction score
0
Location
Nottingham
Can't do R1+R2, but can still do Line and Neutral so test that, and annotate cert to say so, or annotate to say limited testing only due to no earth.All accessories should be class 2, but don't think that includes back boxes, plus assuming new CU has full RCD protection, you have supplementary protection (think that's the right phrase) in place.

Borrowed neutral needs sorting.
Would a light switch need to have hidden screws as these would be extraneous conductive parts if fitted to a metal back box ??

 

steptoe

of course Im wrong, ask my wife™
Joined
Feb 13, 2008
Messages
24,344
Reaction score
119
Location
Gtr Manchester
Would a light switch need to have hidden screws as these would be extraneous conductive parts if fitted to a metal back box ??
DISCUSS,,,,,,

very good point, answers on a postcard please.

Im staying out of this for the time being, but I would tend to agree with that comment. ;)

 
Joined
Jun 21, 2008
Messages
17,033
Reaction score
21
DISCUSS,,,,,,very good point, answers on a postcard please.

Im staying out of this for the time being, but I would tend to agree with that comment. ;)
If we are saying that screws are a suitable conductor to carry fault current to earth to/from faceplate to back box then they could become live. MMM

Are the cosmetic screw caps approved protection against shock?

 

DYCHE4230

Junior Member
Joined
Oct 21, 2008
Messages
12
Reaction score
0
Would a light switch need to have hidden screws as these would be extraneous conductive parts if fitted to a metal back box ??
Is this why we put the earth on the back box????

 
Top