Originally Posted by
MLA
Yes, I understand is was in the boat originally, but was it protection and why is it now extra? I ask, because I do not read that an old amp was removed. My concern is that some circuit is now unprotected.
The max amperage your amps should ever pull cumulatively, is 160W based on their onboard fusing or the manufacture's spec. Its never safe, not needed, to fuse above that potential load. 200A is about 30% over rated. Now, the real problem is the focus put on circuit protection capacity, but can the cable support a 200A breaker? If not, then cable becomes the weak link and if there is a short, becomes a hot flaming molten rope of death, long before that 200W breaker might trip.
I would suggest a trunk/branch setup over individual amp supply runs. And I do not suggest automotive amp install kits. They rarely work well for boats. Buy the incidentals a-la-carte in the proper lengths and amp ratings for fuses or breakers.