Very high r1+r2 readings and Zs in conduit?

[Kev2632]

Hi,

Why would I be getting very high r1r2 readings and Zs readings in a water heater circuit wired in the existing conduit when the house was built back in 19oatcake...? Would the conduit have anything to do with it and if so? Why?

Thanks

 

[VoltzElectrical]

loose connection somewhere?

 

[WPD Lad]

Immersion heater?

 

[trev]

Not enough info to make a judgment Kev. What's the earthing system/Ze/Zs readings on other circuits/have you recently installed an RCD etc etc etc

 

[Kev2632]

All my other circuits readings was good, tn-s system, all connections are tight, and disconnected the water heater supply side from the switch and was still getting weird readings??

 

[VoltzElectrical]

JB somewhere? dunno, just clutching now.

 

[trev]

If it's been wired donkey's years ago I'd be thinking of a JB somewhere.
Is the conduit your CPC?

 

[Kev2632]

Nope no jb, would the badly made off conduit end or something affect the readings for r1r2 and Zs?

 

[Kev2632]

Yea just the conduit as my cpc, and no JB's anywhere

 

[trev]

A jb could be under a floor, if the conduit is your CPC then a poor loint could be to blame but like Voltz said, I'm clutching a little here

 

[Kev2632]

Yea, what ya mean your clutching?

 

[sedgy34]

kev,
sounds like you have a break in the conduit joint ive had similair problem before in a church make sure you completely eliminate the swith from the circuit too

 

[Kev2632]

Yea that's what I'm thinking too, yea I elminated the switch from the circuit so I only had my live coming in from the consumer unit, and tested to the earth on the backpack where the conduit came in, you know?

 

[VoltzElectrical]

how high are these readings? I mean that would have to some pretty badly made off conduit.

 

[trev]

Yea, what ya mean your clutching?

Clutching at straws mate. One of my many skills