Cooker Switch - Correct Amp? New Oven

darkcloudi

I bought a new Taylor Wimpey home 2 years ago and it currently has a cooker switch which is a white square one that is 50a. Its connected to a Zanussi Oven (ZOB343X), 2.7kw. Having looked at the MCB at the consumer unit it appears to be a 20a (this is a separate MCB just for the oven).

I am planning on upgrading the oven to a NEFF N70 B57CR22N0B which is 3.45 kW and requires hard wiring to a 16a power supply.

At the same time the missus wants to upgrade the switches. Noticed that Schneider has a 50a but in a rectangular form and this will be more work cutting out tiles, so would prefer for the square shaped switch. Noticed there are two others: A 45a - british general cooker switch: https://www.toolstation.com/bg-screwless-flat-plate-black-nickel-45a-dp-switch/p83619 or 32a schneider: https://www.rselectricalsupplies.co.uk/schneider-screwless-flat-plate-black-nickel-cooker-switch-32a-black-insert-gu4431bbn_1916

If a 32a cooker switch was fitted will this cause an issue, considering the MCB is 20a, that’s the maximum power that will be sent so guess I should be fine with a 32a or 45a switch (downgrading it from the 50a)?

Also, assuming the 20a MCB should be fine considering the oven recommends a 16a dedicated circuit. I’m guessing Taylor Wimpey would have used a 6mm cable for the oven (didn't take notice of cable size when I checked the cooker switch but can check again).

fenwick458

32A would be fine. even a 20A would do.
look at the click definity range they do a 45A square one,  SIN500 & SCP200