Alternatives/solutions to dodgy wiring

[brightspark]

No.

Electricity company runs 3 phase and neutral in, no earth.

Earth is sourced locally via an Earth spike in the ground.

This is my cunning plan to barns and workshops.

Independent Earth spikes.

Feel free to critique my cunning plan.

But if it's good enough for EDF, it's good enough for me.

nothing wrong with everything being on a tt supply

 

[Barking Mat]

N

Yes you did, you said 4G16, this denotes a cable with 4 cores of 16sqmm with one core being designated as ground (earth)

3ph and neutral would require a 4X16 cable, this is a 4 core cable with no core designated as ground(earth) .

No, I'm doing it 'my way' like Frank, and EDF.

 

[brightspark]

as long as you get your volt drop within an acceptable level, and your earth rod is acceptably low to work then no worries

as long as the earth rod is under 200 ohms it will be fine .most places well under 100 depending on the ground

 

[Dave-sparks]

he did say localy sourced earth so that makes it a tt supply with an earth rod and rcd

Possibly TT yes.

But that's not the point. He stated 4G16 cable which means that the cable has 4 cores, each of 16sqmm and one of those cores is Ground(earth) so it is a 3 core and earth cable.

A 4X16 cable means it has 4 cores, each of 16 sqmm and all are live core (ie. TPN)

 

[Barking Mat]

Really sorry to hijack this thread.

@Wozzaaah feel free to clean this up. (My mess)

But some valid and useful points raised.

 

[mtt.tr]

Possibly TT yes.

But that's not the point. He stated 4G16 cable which means that the cable has 4 cores, each of 16sqmm and one of those cores is Ground(earth) so it is a 3 core and earth cable.

A 4X16 cable means it has 4 cores, each of 16 sqmm and all are live core (ie. TPN)

cores can be used for whatever you mark them up as

 

[Barking Mat]

Possibly TT yes.

But that's not the point. He stated 4G16 cable which means that the cable has 4 cores, each of 16sqmm and one of those cores is Ground(earth) so it is a 3 core and earth cable.

A 4X16 cable means it has 4 cores, each of 16 sqmm and all are live core (ie. TPN)

No, not necessary that one is the earth.

 

[Dave-sparks]

No.

Electricity company runs 3 phase and neutral in, no earth.

Earth is sourced locally via an Earth spike in the ground.

This is my cunning plan to barns and workshops.

Independent Earth spikes.

Feel free to critique my cunning plan.

But if it's good enough for EDF, it's good enough for me.

If the cable is 4G16 then one of the cores is earth(ground) that's that is what the G means.

What you are describing would use a 4X16 cable, X denotes that none of the cores are earth (Ground).

 

[Barking Mat]

If the cable is 4G16 then one of the cores is earth(ground) that's that is what the G means.

What you are describing would use a 4X16 cable, X denotes that none of the cores are earth (Ground).

Really ?

 

[Barking Mat]

Really ?

Live and learn....

 

[Dave-sparks]

cores can be used for whatever you mark them up as

The regulation allowing green/yellow cores to be marked up and used for another function was removed when BS7671:2018 was issued and it is no longer part of the regulations.

Admittedly this has created a slightly grey area as it has not been specifically forbidden, but the intent is quite clear.

 

[Barking Mat]

@Dave-sparks if you are correct my heartfelt apologies.

I've been in France for 20 years and assumed xGx was a universal / European norm for cabling irrespective of earthing.

I have some doubts on your information, but could be wrong, it has been known.

 

[Barking Mat]

Ooh, quick Google proves me wrong.

Back to the naughty corner.

 

[Dave-sparks]

Really ?

Yes, that is what the G or X after the number of cores means.

Cable nomenclature is pretty well standardised.

For example:
H07-RNF 5G16
This means:
H=harmonised colours
07= 750V insulation
R=rubber insulation
N=Neoprene jacket/sheath
F=flexible cable
5= 5 cores
G= designated ground core (on core has green/yellow insulation)
16= 16sqmm conductors

 

[Barking Mat]

My heartfelt apologies.....

Dunce cap, corner time.

 

[Dave-sparks]

@Dave-sparks if you are correct my heartfelt apologies.

I've been in France for 20 years and assumed xGx was a universal / European norm for cabling irrespective of earthing.

I have some doubts on your information, but could be wrong, it has been known.

Yes the xGx is a European (defined by CENELEC) norm, with the options being G or X in that position.

This is very basic cable nomenclature that anyone doing any electrical installation work should fully understand.

 

[Dave-sparks]

My heartfelt apologies.....

Dunce cap, corner time.

Nonsense, nobody needs to apologise for not knowing something.

None of us are born with knowledge, we all have to learn it at some point.

I appreciate that I am not good at communication, and I often come across as rude or somesuch. I do not mean to come across this way, it is a product of my own mix of learning difficulties and mental problems.

 

[Barking Mat]

Yes the xGx is a European (defined by CENELEC) norm, with the options being G or X in that position.

This is very basic cable nomenclature that anyone doing any electrical installation work should fully understand.

Well I do now thanks.

I'm off to eat humble pie, large portion, in the corner, in my cone hat, marked 'D'.

Thanks, every days a learning day.

Feeling a little bit silly, nothing new.

 

[Dave-sparks]

as long as the earth rod is under 200 ohms it will be fine .most places well under 100 depending on the ground

200 ohms is not an acceptable value for an earth rod.

That is an example given as to what the limit of stability might be in a generalised situation.

 

[Barking Mat]

Thanks @Dave-sparks , much appreciated.