On 25/08/2019 19:20, Tricky Dicky wrote:

snip

Shower - This is a temporary circuit as the shower will be replaced
with a digital type when the bathroom is done over so I will utilise
the current 4mm2 T&E & 32A MCB till then.

A 7kW shower is ok but many installs suggest 6mm. The voltage drop at
7kW will also limit the length of 4mm^2 cable too.