I'll be using 8ga wire from the battery into a buss fuse box. I'll have the trolling motor...should I use a circuit breaker for that or what size fuse? running lights, fish finder and bilge pump. (<<<<<using 14ga wire) what size fuse to use for each?? I have a pk of 10's and a pk of 15's I know squat about amps n such. My boat is 12' long and the battery will be in the front and trolling motor in the back. Thanks in advance!!