Radial vs Ring in a standard 3 bed

[CACJL]

Afternoon all.
I normally cable my first fixes in a standard 3/4 bed as follows:

Ring up
Ring down
Kitchen ring.

I was at a trade show the other day and got talking to a few people and they said they only use a ring in the kitchen. Radials up and down. Got me think what’s the standard? I know there’s a max length for a radial circuit even though i can’t remeber it as I don’t normally use them. What do you guys use as I’m on a first fix atm and taking a leg back to the board from my upstairs circuit is going to be hell.

Cheers

Afternoon all.
I normally cable my first fixes in a standard 3/4 bed as follows:

Ring up
Ring down
Kitchen ring.

I was at a trade show the other day and got talking to a few people and they said they only use a ring in the kitchen. Radials up and down. Got me think what’s the standard? I know there’s a max length for a radial circuit even though i can’t remeber it as I don’t normally use them. What do you guys use as I’m on a first fix atm and taking a leg back to the board from my upstairs circuit is going to be hell.

Cheers

Up to 50 square meters 2.5 and 20 amp MCB, up to 75 square meters 4.0 and 32 amp MCB.