Current capcacity for split concentric cable

[Welchyboy1]

have just had a new supply installed at a job im working

supply cable in - 185mm aluminium TPN combined pen conductor split concentric cable

main fuses are 315a bs88's

supplied underground from transformer to building

does anyone have info for current carrying capacity for concentric cables?

looking at the regs this seems considerably underrated

am i missing out something?

 

[Sintra]

If it's buried direct then it's 411A

 

[Welchyboy1]

If it's buried direct then it's 411A

Where did you get the info from sintra please

 

[Guest55]

185mm aluminium TPN combined pen conductor split concentric cable

cant be both ,
either protective earth neutral ( combined earth / neutral conductors )
or split con ( seperate earth / neutral conductors )

is it dno owned this cable ?
i hope so if its pen , as TNC is forbidden on the consumers side.

 

[Sintra]

Where did you get the info from sintra please

I have it on a pdf from UKPN.

https://www.dropbox.com/s/sqrq0wei4yqnvj1/EDS+02-0033+LV+Waveform+Mains+Cables.pdf

 

[Welchyboy1]

cant be both ,
either protective earth neutral ( combined earth / neutral conductors )
or split con ( seperate earth / neutral conductors )

is it dno owned this cable ?
i hope so if its pen , as TNC is forbidden on the consumers side.

yes it is, they installed it, sorry its a pen conductor, not split

 

[Welchyboy1]

I have it on a pdf from UKPN.

https://www.dropbox.com/s/sqrq0wei4yqnvj1/EDS+02-0033+LV+Waveform+Mains+Cables.pdf

thats just what i wanted, thank you

its a great deal of difference compared to our regs tables

 

[Guest55]

yes it is, they installed it, sorry its a pen conductor, not split

in which case the dno will not in the slightest bit be interested in following the figures given in bs7671 to size their cable lol.
they'll be much more generous than sintras value.
;-)