ring testing

[foghorn]

whilst doing ring continuity i have no end to end on cpc also on isulation test live earth im getting 9.50Meg ohmson the same ring are these two results to do with the same problem if so how can i go about finding the fault am i right in saying that if i spilt the ring at one of the sockets then check continuity on each earth at all other sockets i should find the break in cpc wilol this give me low insulation readind live earth.

 

[Amp David]

You have no CPC continuity because some wheres its broken. Is this circuit new or existing?

 

[foghorn]

existing ring black and red solid copper cables is also down on insulation live earth

 

[Amp David]

Whats wrong with 9.50MΩ ?

 

[foghorn]

all the rest is >299 so something not right

 

[foghorn]

scratching my head with this cant locate broken earth had all sockets of replaced several still no cpc end to end im thinking that the low insulation test has something to do with no cpc end to end

 

[Amp David]

It complies though, well above the min required.

I'd just sort your bad CPC and jobs a good un

 

[Amp David]

Wonder if someone has nailed a picture hook into the wall and its gone through the CPC and clipped the line insulation, then at a later date the hook has been removed.

 

[dagrat]

Disconnect the earths and carry out earth continuity test using the wander lead, this should help locate where the break is.
As amp David says 9.3mohms is a pass even if not as high as the other tests

 

[foghorn]

so does that mean disconnect both earths at the sockets and go round doing the same at all sockets belling out each aerth at every socket

 

[Amp David]

Hows work in Stockport Fred Flintstone?

 

[foghorn]

old houses lol

 

[shagbite]

there could be a jb hiding away under the floor. or, and i don't mean to insult you, but were you testing end to end cpc on the same circuit?

 

[foghorn]

landing light wired weird 2way common upstairs go straight to landing light L1 and L2 links to down stairs 2 way common taken from common of 2 gang switch

 

[dagrat]

so does that mean disconnect both earths at the sockets and go round doing the same at all sockets belling out each aerth at every socket

No, test from one earth leg at the consumer unit to each socket outlet, if there is a break the the reading will increase the nearer you get to the break.