I think I found the answers on the vehicle wiring web site .
as follows
11amp.
Typical applications. Side & tail lights, alarms, reversing & rear fog lamps,
electric aerial, horns general wiring.
.
16.5amp.
Typical applications. Side & tail lights, alarms, reversing & rear fog lamps,
electric aerial, horns general wiring.
25amp.
Headlamps, fog & driving lamps,
rear screen heater, windscreen wiper motor.
33amp.
Typical applications. Charging cable for battery feed and ammeter.
.