electric cooker isolation switch socket

Hi all, I’ve purchased samsung built-in single oven Samsung nv7b57550tak. I have dedicated ring directly from consumer unit, buried into mortar, on a 40a mcb with 6mm cable to connect the oven with. As installed by my builder. My questions are, 1)Is the mcb/cable setup acceptable (can 40A be...

Hi, I have neff electric oven and last night there was loud bang and when i went into the kitchen the red cooker switch with socket plug was all burnt out round edges. Any ideas what could have caused it? Is it going to require a new switch? Any help appreciated.