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Use by skilled or instructed persons?
Where there are larger fault currents you should also consider the
type of person who will operate the devices.
If you can restrict access to the board to ‘skilled’ or ‘instructed’
persons only, perhaps by having the board in a locked riser or
ensuring that the door to the board is locked, then
BS EN 60947-2 can apply if the device has 947-2 ratings
assigned by the manufacturer.
In such a case the 10kA BS EN 60898 devices may be rated to
15kA; again manufacturer’s information must be obtained.
Distribution board fault current rating
The manufacturer is responsible for ensuring the capability of the
equipment between the incoming and the outgoing terminals of
the distribution board, which includes busbars and connections
as well as incoming and outgoing devices.
The manufacturer will have determined the distribution board
fault current rating(s), in accordance with the product standard.