[derfniw]

Actually I think the 2x16A should have a different phase per fuse. Otherwise you hit the max of your phase fuse when you put all 4 (assuming a somewhat standard one) heating plates to the max.

In NL, assuming a somewhat modern setup, you have two sets of fuses: one per phase capped at the phase capacity ( commonly 25A), and then another fuse per group (usually: 16A).

(Source: lives in a recently renovated apartment in NL :) ).