Confused by cable selection tables.

[OtleySpark]

Studying the Electricians and On Site Guide tables (for my Domestic Electricians course with OLCI) and the cable sizes all have double entries in the tables 4.1.1, 4.1.2, 4.1.3. That is the Cable csa for different circuits show 2.5/1.5, 6/2.5 etc.

I understand the need for different csa for different circuits, but why are there 2 figures for each circuit?

Thanks

 

[Engineer54]

The second entry (the smaller one) is the CPC size!!

 

[OtleySpark]

The second entry (the smaller one) is the CPC size!!

Ha - it should have been obvious to me - but it wasn't. :redface:
It doesn't say that anywhere I can see on the tables.

Thanks for putting me out of my misery though