Originally Posted by David Analog
Nope. Just on the positive side.
If every amplifier has a sophisticated internal protection circuit you don't necessarily have to fuse each amplifier individually. But, in any case, you must have a master fuse or breaker at minimum of the appropriate size in very close proximity to the supply source. The primary function of this master fuse or breaker is to protect the boat and occupants in the event of a boating accident.
David, thanks for the clarification. I am installing a 200A resettable circuit breaker on a 1/0 awg power wire between the battery and the distribution block. The distribution block will feed two amplifiers (SD6 and MHD 600/4) by means of a 4 awg wire to each amplifier.
Is in necessary to add a smaller fuse on the 4 awg wire between the distribution block and each of the amplifiers?