Quote by John4646
And does the 6/10/16amp thing mean anything in practice? Many thanks, John4646
It means this is the rating of the trip on your individual EHU hook up point. If you exceed this rating then the trip will operate. On some sites the trip device is not accessible to you so you will need to get the site operator to reset; not very easy if it trips at say 9pm when there is no one in the office.
On many sites the trip is visible at the EHU hook up point. The rating is usually defined on the trip by a designation of C6 or C10 or C16. Very occasionally you will find a trip designated with B instead of C, that just means it will trip a little quicker.