Fault finding!!!!!!

[timo1]

Thanks for the update. Glad you found the fault mate.

 

[marconi]

Oh dear 

What I am about to ask is called 'reflective learning' and is a very effective way of learning and implementing 'lessons learned' in the future:

a) what did you learn?;

and

b) what will be your practice in the future?

 

[HappyHippyDad]

What I am about to ask is called 'reflective learning' and is a very effective way of learning and implementing 'lessons learned' in the future:

a) what did you learn?;

and

b) what will be your practice in the future?

a) I sometimes hold my diagrams upside down when tired.
b) To hold my diagrams up the right way and drink more coffee.


ps... and to perhaps take heed of my own threads!!!! http://www.electriciansforums.co.uk...55-odd-request-regarding-phantom-voltage.html

 

[Dave OCD]

HHD, was your wiring in singles ? I only ask because I can't understand how you could mix up neutrals if using twin & earth as the neutrals would share the same composite cable sheath as the line conductors ?

 

[HappyHippyDad]

HHD, was your wiring in singles ? I only ask because I can't understand how you could mix up neutrals if using twin & earth as the neutrals would share the same composite cable sheath as the line conductors ?

There's a 19 core SWA going out to the pens and 12 twin and earths going to a 12 gang plate switch, so the neutrals in the RCBO's were from the 19 core and the line conductors in the RCBO's were from the twin and earth. Quite a bit of cable! But I still shouldn't have got them mixed up!

 

[netblindpaul]

Hang on, you have the phase conductors going down the SWA, and the corresponding neutrals going back through flat twin & cpc's?

 

[Dave OCD]

There's a 19 core SWA going out to the pens and 12 twin and earths going to a 12 gang plate switch, so the neutrals in the RCBO's were from the 19 core and the line conductors in the RCBO's were from the twin and earth. Quite a bit of cable! But I still shouldn't have got them mixed up!

Well that makes it understandable, very easy to mix them up, and I'm sure you won't be the first or last to do this.
Usually when I'm trying to concentrate on something like that the customer decides it's a good time to start chatting away. :dizzy2:

 

[Dave OCD]

Hang on, you have the phase conductors going down the SWA, and the corresponding neutrals going back through flat twin & cpc's?

No that's the OPPOSITE to what he said- the switched line conductors would be in the SWA too but via the T&E to and from the switches.

 

[HappyHippyDad]

Well that makes it understandable, very easy to mix them up, and I'm sure you won't be the first or last to do this.
Usually when I'm trying to concentrate on something like that the customer decides it's a good time to start chatting away. :dizzy2:

Yes! And you have to try and be polite, whilst thinking 'I really need to concentrate on this'! :frown2:

 

[marconi]

a) I sometimes hold my diagrams upside down when tired.
b) To hold my diagrams up the right way and drink more coffee.


ps... and to perhaps take heed of my own threads!!!! http://www.electriciansforums.co.uk...55-odd-request-regarding-phantom-voltage.html

I'd add - c) to label your wiring diagram and cables and conductors using some scheme - colour, numbering.

Because I am curious: What further investigations did you do on the 19 core SWA? How did you leave the defective core? How and where did you record the fault in the SWA? Did you recommend follow up testing and inspection on the 19 core SWA at some points in the future?

 

[netblindpaul]

No that's the OPPOSITE to what he said- the switched line conductors would be in the SWA too but via the T&E to and from the switches.

Still confused, it seems that the lines & neutrals to and from the rcbo's are down different cables?

 

[davesparks]

Still confused, it seems that the lines & neutrals to and from the rcbo's are down different cables?

I think what he means is the 19core is terminated into the DB, then 12 T&E run from the DB to the grid switch. Inside the DB the switched lives from the T&E being joined onto the live cores of the 19core.

 

[netblindpaul]

OK...?

 

[davesparks]

OK...?

It follows a general method of installation work which is all the rage these days. It's called 'bodge it and scarper'

 

[Dave OCD]

It follows a general method of installation work which is all the rage these days. It's called 'bodge it and scarper'

That's out of order inferring that HHD is a bodger, the bloke seems conscientious to me , and there's absolutely nothing wrong with the method either !

 

[davesparks]

That's out of order inferring that HHD is a bodger, the bloke seems conscientious to me , and there's absolutely nothing wrong with the method either !

He's a Electrical Trainee and very worrying at times with some of his posts

 

[Dave OCD]

I don't know about that.

 

[Marvo]

As I've said before, it's everyone's own decision whether to assist in threads or not. If you think a member is being a danger to himself or a user of an installation please use the report button and if the staff agree the thread will be closed on grounds of safety.

You're more than welcome to discuss the system itself but the one thing we don't allow is belittling of guys who are legally entitled and considered competent by the industry framework to be doing the job their working on. It seems particularly harsh in this case as well where the OP himself has acknowledged the shortcomings of the system in the past and has shown over time a commitment to better himself and improve his skill set.

HDD, you seem to have found the problem you posted about originally so I'm going to close the thread.