Fault on lighting cct prevents taking Zs

[Michael J]

Hi All

Taking a Zs from a light switch and am reading 160 volts between L & E.
What would you code this. I think it could be a neutral fault but I don't have the time available to investigate. The location is a hotel room.

 

[westward10]

Before you can Code you need to confirm the cause and effect, if you are doing EICRs this should be knowledge you possess.

 

[Octopus]

C2 - check the earth continuity - bet there isn't any ..........

And as for investigating - that's not really what an EICR is about ...

 

[westward10]

C2 - check the earth continuity - bet there isn't any ..........

The OP should be aware of this if carrying out an EICR.

 

[Michael J]

The OP should be aware of this if carrying out an EICR.

You will have to have a bit of patience with me as up to a year ago the only experience I had of a ring circuit was at 11000v,the last phase rotation test was on a 11000v , 7.4 MW ,slip ring motor and my last-phasing out was paralleling two 5MVA 1100/550V Dyn 11 transformers. The signing off package ran to volumes.

Having said all that I am also autherized to switch 33000V systems.

The OP was aware

 

[MFS Electrical]

You will have to have a bit of patience with me as up to a year ago the only experience I had of a ring circuit was at 11000v,the last phase rotation test was on a 11000v , 7.4 MW ,slip ring motor and my last-phasing out was paralleling two 5MVA 1100/550V Dyn 11 transformers. The signing off package ran to volumes.

Having said all that I am also autherized to switch 33000V systems.

The OP was aware

Don’t you go round wiring up 11kV rings anywhere near me not something I want to come across on a domestic/commercial EICR most of the time someone on here will assume the worst we are all guilty of it with the limited info most OPs give and the amount of chancers we get on here doing their own work and nuggets that don’t know their earth from their a**e

Edit: I’ve never heard that saying before so I’m copyrighting it and making it a trademark don’t steal it

 

[Nigel]

The OP should be aware of this if carrying out an EICR.

I am not sure how this helps anyone.

This could be a standard response to every question.

 

[Strima]

Other test results?

R1+R2?

IR testing?

And out of curiosity why Zs from a switch position and not furthest point of the circuit?

 

[davesparks]

You will have to have a bit of patience with me as up to a year ago the only experience I had of a ring circuit was at 11000v,the last phase rotation test was on a 11000v , 7.4 MW ,slip ring motor and my last-phasing out was paralleling two 5MVA 1100/550V Dyn 11 transformers. The signing off package ran to volumes.

Having said all that I am also autherized to switch 33000V systems.

The OP was aware

That's lovely, but as far as I know completly irrelevant to your original question and any testing carried out to bs7671.
This suggests you have less than a years experience of working on installations at lv and to bs7671, so approximately the same experience as a first/second year apprentice.

 

[TJ Anderson]

Hi All

Taking a Zs from a light switch and am reading 160 volts between L & E.
What would you code this. I think it could be a neutral fault but I don't have the time available to investigate. The location is a hotel room.

Not being funny, but you tested L - E, got 160v, and you think it could be a neutral fault??? How?? You were not testing for a PD across L&N? Unless of course, a PEN conductor was down, but then I would hope you would have noticed other interesting things too lol. Obvs, that last bit was a joke!

As Murdoch has already suggested, you clearly have a floating cpc/earth.

 

[Michael J]

That's lovely, but as far as I know completly irrelevant to your original question and any testing carried out to bs7671.
This suggests you have less than a years experience of working on installations at lv and to bs7671, so approximately the same experience as a first/second year apprentice.

You obviously don't get the joke, lighten up a bit

 

[davesparks]

You obviously don't get the joke, lighten up a bit

Do enlighten us, what is the joke?
You are carrying out an eicr, what is the joke?
Electrical safety at any voltage is far from a joke, if you have a clue you will realise electricity can, and will, kill without any regard for your opinion of whether it is funny or not.

Personally I don't care, but I'm lead to believe that the death of humans is unacceptable?

However I am curious as to how a liver and bacon casserole would taste with hunan liver? I've made it with all of the commonly available livers but humans are somewhat harder to come by for some reason? Perhaps once a few people have died from your approach to electrical safety you could cut out their livers and send them to me, I'll be happy to invite you to dinner to try this particular delicacy.

 

[Deleted member 72666]

Was that last bit strange or what!

 

[Pete999]

Other test results?

R1+R2?

IR testing?

And out of curiosity why Zs from a switch position and not furthest point of the circuit?

Perhaps the switch is the furthest point!

 

[Nigel]

Other test results?

R1+R2?

IR testing?

And out of curiosity why Zs from a switch position and not furthest point of the circuit?

High level lights would be my guess.

 

[Nigel]

Perhaps the switch is the furthest point!

Not sure that is even possible.

 

[Pete999]

Not sure that is even possible.

What that it isn't or can't be the furthest point?

 

[snowhead]

Not sure that is even possible.

Maybe in metres, but not in Ohms.

 

[Nigel]

What that it isn't or can't be the furthest point?

How can a switch be the furthest point?

 

[Norah Nabino]

Hi All

Taking a Zs from a light switch and am reading 160 volts between L & E.
What would you code this. I think it could be a neutral fault but I don't have the time available to investigate. The location is a hotel room.

Out of curiosity why are you quoting the units of zs in volts??
I thought it is measured in ohm