Has anyone come across this type of cable for a submain.

[Julie.]

say what?! Slowwwwly.....

At the incomer the cores have been split to L, N, and earth - you can see the three cables coming in.

This split concentric cable joins the N and E together - which is prohibited (joined quite well or fairly poorly depending on which outer wires are used at each end).

In effect this additional combining of pen gives the silly earthing arrangements

 

[davesparks]

Since the earth is re-combined with the neutral (and then split at the cu ) the system has become

the earth is not recombined with the neutral, they are seperate.

 

[Julie.]

Nonsense, split concentric is permitted in installations.

Only in certain installations, but not the way this has been done

 

[davesparks]

The split concentric cable joins the N and E together - which is prohibited (joined quite well or fairly poorly depending on which outer wires are used at each end).

No it doesn't, it keeps the N and E seperate, that's why it is called split concentric, the outer concentric conductor is split into two different conductors.
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Only in certain installations, but not the way this has been done

By which rules and what installations?

 

[Julie.]

No it doesn't, it keeps the N and E seperate, that's why it is called split concentric, the outer concentric conductor is split into two different conductors.
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By which rules and what installations?

Yes, but usually they are separately identified - these don't look to do so - it could be that only one set of outer wires goes to neutral, and the other to earth, but as I see that particular instance such segregation isn't guaranteed, it looks like a random selection of outer wires split between n&e rather than proper split.

The neutral wires usually have continuous insulation, it looks to me that its sleeved - on my phone anyway

 

[mattg4321]

Think you’re wrong on this one Julie.

That looks like split concentric to me. The neutral comes insulated blue and the cpc is bare

 

[Julie.]

Think you’re wrong on this one Julie.

That looks like split concentric to me. The neutral comes insulated blue and the cpc is bare

That would be what I would expect, but it looks like sleeving to me, if it isn't and it has been split correctly, then my bad.

 

[davesparks]

Yes, but usually they are separately identified - these don't look to do so - it could be that only one set of outer wires goes to neutral, and the other to earth, but as I see that particular instance such segregation isn't guaranteed, it looks like a random selection of outer wires split between n&e rather than proper split.

The neutral wires usually have continuous insulation, it looks to me that its sleeved - on my phone anyway

They are seperately identified, the blue cores insulated cores are connected to the neutral bar and the bare earth cores have been sleeved and connected to the earth bar.

 

[Julie.]

They are seperately identified, the blue cores insulated cores are connected to the neutral bar and the bare earth cores have been sleeved and connected to the earth bar.

Perhaps it is me and my phone, but it looks like sleeving on both n&e to me, if not and it's been done correctly then I stand corrected.

 

[mattg4321]

I’d have money on it that it isn’t sleeving