Can a DNO Service Cut-out be used as the primary source of fault current protection, when the DB it supplies is more than 3m from the intake?

In what way does the ownership of the fuse affect the fault protection offered ?

I guess the DNO's argument is that they may wish to change the fuse characteristics at some point in the future and don't want to be responsible for re-evaluating the design of the customer's installation if they do (at least not anything beyond looking at what's obviously next to the cut-out and compare with some very simple rules). Many homes have increased from 60A to 80A or 100A over recent decades and as there is a tendency to 'electrify' even more (space heating an EV) it's reasonable to assume that the trend will continue.

  - Andy.

In what way does the ownership of the fuse affect the fault protection offered ?

I guess the DNO's argument is that they may wish to change the fuse characteristics at some point in the future and don't want to be responsible for re-evaluating the design of the customer's installation if they do (at least not anything beyond looking at what's obviously next to the cut-out and compare with some very simple rules). Many homes have increased from 60A to 80A or 100A over recent decades and as there is a tendency to 'electrify' even more (space heating an EV) it's reasonable to assume that the trend will continue.

  - Andy.