Main in-line fuse in engine compartment.

gearshift

I have been running my Norcold fridge on an inverter for the past 5 seasons due to the fact that the DC operation died. Runs great on AC. The last time I used it it blew the (original?) in-line fuse in the engine compartment that runs the 12 volt DC power to the galley. Does anyone know how many amps this fuse should be? It looks like the old one is marked 30 amps (in-line Buss Glass fuse)

gearshift

Oh....I forgot to add....1992 Rinker Fiesta V 260 5.7L Bravo II