Type of power cables for home

[Vitaliy]

Hello, I'm from Ukraine. May be I've created this topic in wrong place - sorry.
May be this is strange question, but we have a holy wars based on this question... Our standards are not perfect, that's is a reason of such questions.
I want to ask, which types of cables are you using for home fixed wiring? I mean in-walls mounted sockets and switches like on picture:

Which types of cables is allowed for fixed wiring?:
1)

2)

3)

4)

5)

Which of them is not allowed for use?
Is there prohibition on using of stranded wires?
And also in what way cables should be connected?
Where can I read about this more?
Thanks!

 

[amlu]

for domestic stuff in UK you have mostly "twin and earth", 2 insulated cores for live and neutral, one uninsulated for earth (helps with stripping the cable to terminate it, you put your own insulation whenever needed). up to 2.5 mm^2 size they come as solid core, larger ones have couple of smaller strands.
theres "3 core and earth" , used on multi-switch lighting circuits, boiler controls and fire alarm wiring.
there is flex cable too, is more expensive and needs ferrules to nicely terminate it, is not used much often on fixed wiring installs.

have a look here - guide to UK wiring, cable section.
https://www.tlc-direct.co.uk/Book/4.1.1.htm

when there is a conduit available for the wiring then single cables can go in, like on your picture no. 2

 

[Octopus]

The UK regs don't allow for junction boxes, like in your picture, to be buried in the walls

 

[Darkwood]

With all respect you need to source a competent person knowledged in your own regions regulations as ours are British Standards and can be much stricter as oppose to other countries.... advice and info given may not be correct to your country of origin.

 

[Vitaliy]

Thanks for your answers.
I'm doing electricity in my home by myself. I have an experience in electronic circuit design, but when I've started reading our standards I became confused. In electronic devices I'm preferring to use flexible cable and in exceptional cases - solid wires. But our standards tells that we need to prefers solid wires and in exceptional cases - flexible for fixed wiring. So my logic crashed here... And I can't find a reason (it is not mentioned in rules). If reason is only economy then it is not a problem, but if there are some milestones - I want to know them.
Our standards are quite old and actually, based on your (or IEC or else) old version of rules. I want to make all according to rules but our rules are in conflict with my logic and experience. That's why I come here to ask you

Also in our rules we have a requirement which tells that we need to have possibility to change wire (cable) in fixed condition (under plaster for example), but it is almost impossible with solid triple cables.
But I assume that it is possible in a case like on this picture:

Is it allowed for use in UK? What are general recommendations for in-plaster mounted wiring?

amlu - thanks for your link, I will read it.

Murdoch - what is allowed then?

Best regards!

 

[Octopus]

Thanks for your answers.
I'm doing electricity in my home by myself. I have an experience in electronic circuit design, but when I've started reading our standards I became confused. In electronic devices I'm preferring to use flexible cable and in exceptional cases - solid wires. But our standards tells that we need to prefers solid wires and in exceptional cases - flexible for fixed wiring. So my logic crashed here... And I can't find a reason (it is not mentioned in rules). If reason is only economy then it is not a problem, but if there are some milestones - I want to know them.
Our standards are quite old and actually, based on your (or IEC or else) old version of rules. I want to make all according to rules but our rules are in conflict with my logic and experience. That's why I come here to ask you

Also in our rules we have a requirement which tells that we need to have possibility to change wire (cable) in fixed condition (under plaster for example), but it is almost impossible with solid triple cables.
But I assume that it is possible in a case like on this picture:

Is it allowed for use in UK? What are general recommendations for in-plaster mounted wiring?

amlu - thanks for your link, I will read it.

Murdoch - what is allowed then?

Best regards!

I have no idea what the regs are in the Ukraine.

 

[Vitaliy]

I have no idea what the regs are in the Ukraine.

I know our rules, but I want to know your rules.

 

[Darkwood]

We can bury twin and earth direct in plaster, they have to comply to Zoning and also likely to require rcd protection too... the regs are too variable to give a staight answer to your question as its all circumstantial and you can be asked by local councils to install conduit systems in certain building to allow for easy rewiring.

 

[Octopus]

I know our rules, but I want to know your rules.

Why may I ask?

 

[Vitaliy]

Why may I ask?

Our standards are obsoleted. Just want to compare our rules with other countries.

 

[Octopus]

Our standards are obsoleted. Just want to compare our rules with other countries.

You could buy a copy of the BGB BS 7671 AMD 3