Separating TNCs supply

[N6rul]

Hi everyone, I was hoping if someone can help me, I separated the electrics in a house with a Tncs supply. Quite some time back... Went back today and noticed the circuits on db1 isolate with no problems but the circuits on db2 still show 160 volts when the mcbs for the circuit is isolated. Now to isolate the circuits, I have to turn of the main breaker.. Some advice will be greatly appreciated.... Thanks..

 

[Octopus]

Me thinks you need to describe how you "seperated" the electrics and what type of tester you used to "read" the 160v

 

[Darkwood]

As with all posts of this nature help us before we can help you, what tests have you done and what results?
You are an Electrician so a testing routine should have best carried out to identify what is causing the voltage.... you don't even tell us what your testing between??

If you haven't done any testing then Im out .... do a test routine and return when you have results.

 

[Knobhead]

I’ve a good idea what’s happened but it would be an educated guess.

Without more information your on your own.

 

[N6rul]

Reply

I didn't get a chance to do a test this will be done today and I'll get back to you.. Thanks...

 

[Pete999]

Switched it on with no tests?

 

[Knobhead]

You can't beat the "BANG" test for quick resuts.

 

[markc123]

Re: Reply

I didn't get a chance to do a test this will be done today and I'll get back to you.. Thanks...

Bull....

Didn't get chance ? More like CBA or you don't have a clue how to test.

You wouldn't even pass the first year of an apprentership by switching on without dead testing.

Sort it out before your bodging bites you on the arse.

 

[Darkwood]

So you left a job with a potentially dangerous fault on it or did you fully isolate the power until today for safety reasons as you should have if you were unable to address the problem you were called out to?
I hope the latter.....

Just imagine if the fire brigade did that on a house fire.... sorry love not sure why your house is on fire - ill pop back tomorrow and will get the hoses out!

 

[trev]

Re: Reply

I didn't get a chance to do a test this will be done today and I'll get back to you.. Thanks...

OK then, what tests are you planning to do and what instrument(s) are you planning to use?

 

[a1guvner]

I used to like the saying

Red to Red
Black to Black
Flick the switch
And stand well back

 

[Knobhead]

I’m fascinated as to what he means by “separated a TN-C-S supply”.

 

[polo1]

I hope he means he "split" a TNC-S supply (as in henleys)! :willy_nilly:

 

[Octopus]

I hope he means he "split" a TNC-S supply (as in henleys)! :willy_nilly:

We can only speculate!

And I'm pondering as to what he means by the sentence "quite some time back"

 

[7029 dave]

I used to like the saying

Red to Red
Black to Black
Flick the switch
And stand well back

I like that, kinda rolls off the tongue.

 

[Silly Sausage]

I’m fascinated as to what he means by “separated a TN-C-S supply”.

It's a T N-C-S supply, who needs earth?

 

[Knobhead]

That wouldn’t surprise me Archy.

 

[Rockingit]

I think he probably means he swapped a single CU for a 2way. In which case, I'm also going to make an educated guess that I'll keep to myself!

 

[cprfenom]

It does sound like he put in a sub board and probably hasn't run an earth conductor?

 

[markc123]

Bet Mr.OP or should i say DIY Dave doesn't come back.

I don't like shouting at people on this forum, and tend too stay well clear and leave it to the bigger boy's but some people really do need telling.

The original post is actually frightening.