You're saying that if you don't need overload protection the MCB does not have to have a higher rating than the design current.
But the 2.5 mm circuit supplying both an electric hob and an oven does need overload protection, therefore the rating of the MCB has to be higher than the design current, so the B16 is a clear breach of the regulations, despite the MCB being rated for the cable.
Yes from the cable's perspective that's correct.
From the OCPD perspective, it's a different story as it's being subjected to overload.
As I said earlier, despite it not being started specifically in BS 7671, I'd never select In to be less than Ib for that reason
You're saying that if you don't need overload protection the MCB does not have to have a higher rating than the design current.
But the 2.5 mm circuit supplying both an electric hob and an oven does need overload protection, therefore the rating of the MCB has to be higher than the design current, so the B16 is a clear breach of the regulations, despite the MCB being rated for the cable.
Yes from the cable's perspective that's correct.
From the OCPD perspective, it's a different story as it's being subjected to overload.
As I said earlier, despite it not being started specifically in BS 7671, I'd never select In to be less than Ib for that reason
