Cable size issue with size of shower

[Linksy5]

Hello
Looking for some guidance please.
Lived in current house just over a year now and had couple issues with our pull cord switch (45A) sticking. Also at its worst, experienced the neutral burnt out.
My relative (industrial electrician) has put some potential issues across to me so was hoping you could all help make sense of it all.
Shower is 9.5KW
Unsure on voltage 230/240
Cable is 6mm
MCB is 32A type 2.
Cable from consumer to pull cord no more than 10M inside wall.
Pull cord to shower 1-2M above ceiling.

They have put doubts to me that the cable may not be big enough
Other option is they said to get smaller shower.

 

[telectrix]

We were lucky.

shoebox??? bloody luxury. last week's liverpool echo as a roof. kept the rain of as it was soaked in chippy grease from having wrapped last night's chips.

 

[Midwest]

 

[cartellll]

BOLLOX. 9.5kW = 39.6A . 6mm clipped direct on a 40A or 45A MCB.

BOLLOX 2 U... 9.5kW/230V=41.3A
if you read Linksy5 comment Cables buried in wall not clipped direct
Surely you know about voltage drop

 

[ferg]

I was looking for the brave smiley but can't find it anywhere.

 

[Deleted member 9648]

BOLLOX 2 U... 9.5kW/230V=41.3A
if you read Linksy5 comment Cables buried in wall not clipped direct
Surely you know about voltage drop

Technically you are correct, if this was being wired from scratch a 10mm/45a circuit would be installed. However the OP is simply complaining of pullswitches failing due to thermal damage. That will be nothing to do with the cable size or mcb rating and everything to do with poor connections at the switch.
Given the short duration of the load for a shower it's unlikely that the 6.0mm and 32a mcb will ever be a problem , the issue is poorly connected pullswitches and rewiring the circuit will not resolve that..