meter tails

[asc]

was looking at a recent rewire with the meter tails 25mm but single insulated (from the meter), anyone know if there is a particular or general regulation that says they should be double insulated?

 

[Lectrician]

Let me see......YES!

Are you sure they are not double insulated with a coloured sheath, rather than a grey sheath?? Fairly common on XLPE types.

 

[asc]

yeah, now you have got me wondering but I did think at the time they could be that but discounted it because of the size - but I could be wrong so there is a reg and it's not just good practice?

 

[RF Lighting]

Did it look anything like this?

The tails from the meter to the henly block are actually double covered 16mm² tails.

 

[pdcelec]

thats one hell of a supply for a fire alarm!

 

[RF Lighting]

You may notice that the fire alarm supply also has no earth

 

[Lectrician]

You may notice that the fire alarm supply also has no earth

What? You need to earth them !?!

 

[kai]

In older installations, it was common for the meter tails to be coloured RED and BLACK on both the inner insulation, and the outer covering, until recent years, when grey became mandatory (around 5 years ago perhaps).

 

[supersparky]

untrue, grey is not mandatory.
REC use it all the time and its sometimes specced on jobs

 

[plugwash]

do they use two different shades or something so you can tell easilly when the outer layer of insulation has been damaged?

 

[securespark]

No, a visual inspection will tell you that!

 

[plugwash]

hmm i always thought the point of two layers in different colors was that if you saw the inner color you knew it was unacceptablly damaged (rather than just say normal abrasion from pulling through holes in brickwork etc) and therefore that it needed replacement.