Hi Phil. So 25 CBs @$30=$750. This should be a small fraction of the overall value of your CAT. BlueSea
gear is well respected. The rating of the panel breaker is determined by the ampacity of the wire, NOT the rating of the load. Sensitive
equipment will have an inline fuse at the
equipment end. Here an ATC/ATO fuse in an enclosed inline holder works well. These
fuses are colour-coded based on amperage and are easy to tell apart (a lot easier than trying to read the amperage off the end-cap of a cylindrical glass fuse ).
Don't forget to consult tables to determine the correct gauge of wire, based on load amperage. There are two conditions that come into play here: (i) The ampacity of the wire, (ii) The voltage drop based on the length of the wire. Standard tables are published for 10% and 3 % voltage drops. Also, all wire should be
marine grade tinned fine stranded copper. Also proper
marine terminals. Long story short: Don't go
cheap !