8.5 kw Shower

[lancashire]

I have a 6mm cable about 4 metres of it in conduit and rest is clipped to the timber rafters leading to the ceiling above my bathroom, total length of cable is about 14 metres, The consumer unit is protected by RCD, the MCB is 40 amp and I have a 2 pole 45 amp pull switch.
the shower is a 8.5 kw unit
is this safe or am I pushing it, also how close can I put the pull switch to the shower, I have avery small bathroom.

Thank you in anticipation

Carl

If I have to buy 10mm where is the cheapest place

I live in Bolton

 

[breezer]

If I have to buy 10mm where is the cheapest place

shop around, start at electrical wholesaler

 

[comms]

The 8.5KW shower will pull 35amp so yes your mcb is sufficient.
I assume the rcd is 30mA if so it's fine.
The 6mm cable will be ok but it is right on the limit I would go for the 10mm you never know you may decide on a higher wattage shower at a later date.
The 45amp D/P switch, if the measurement from floor to ceiling is over 2.5 meters it can be mounted on the ceiling as this area is outside the required zones, but it can not be within 0.6 meter of the shower cubicle, if that is not possible fit it outside the bathroom.
As already said by Breezer visit the local wholesaler for the 10mm cable cost they all vary.