sizing tails

[havoone]

I did the 2382 last year and during the coarse the lecturer told us that in NEW domestic dwellings the live tails would now have to be 25mm. I cant seem to find where in the regs he came up with this but I think it was associated with chapter 54/earthing, and some cross referencing. any idea ? thanks.

 

[Sintra]

Meter tails are part of the consumers installation and are to be provided by the installer. Meter tails must be sheathed and insulated or if insulated only must be enclosed in trunking or conduit. Meter tails must be 25mm. Where the meter tails are protected against fault current by the main fuse the installation method, maximum length and minimum cross sectional area must meet the distributors requirements. OSG p17.