Installation of 3 x 3kw heaters

[edkea]

what would be the correct method to install 3 x 3kw electric wall heaters i.e cable size / rating and whether individually wired or on a ring

 

[Steve]

Three 16 amp radials with 2.5mm cable (depending on distance)

This is notifiable.

Why do you wish to have such an arrangement?

Electric heating is the least efficient of all forms of heating.

 

[luminaire]

This is going to depend on a number of factors:
Length of cable
Is it clipped or will it go through insulation.

I can't imagine it being anything less than 10mm². That's going to make it pretty tricky to work with, so probably your best bet would be to wire them individually.