Overload?

[ThrownRazor25]

Tbh honest I doubt consideration has been given previously to the installation method, as he can't even work out if 13kw is too much for a 50a breaker, a pretty basic sum

I did not know it was 13k!!!! The shop owner "reliably"told me it was less than 50amp

 

[Darkwood]

I did not know it was 13k!!!! The shop owner "reliably"told me it was less than 50amp

Regarding the customer who i assume isn't an Electrician saying its less than 50amp supply then i think you are just learning a valuable lesson here and im sure you will take steps in future to confirm the customers figures for yourself... what is a concern is you seem to have forgotten to do basic cable calcs which in your set-up could see the cable rating reduced to less than 50amps although we lack info to clarify this but i probably would assume due to the methods chosen that you can't increase to 63amp.... can you detail more about the install methods like length and insulation etc