Failure analysis help

[longline]

requested on the following system: Twin battery, alternator and bus system. Basically two complete and separate systems, with a cross tie relay to power either system in the event of an alternator failing. Electrically dependent fuel system.

There are three fuse blocks. I could use one fuse block for the two fuel pumps, utilizing diodes from each alternator system. Alternatively, I could simply fuse one pump to each alternator system.

Keep it simple, or use the fuse block as an essential buss? And why, if you please.

[bret]

If that one feed for that one fuse block the runs both fuel pumps fails, glider. many ways to skin cats. I did three fuse blocks also, one complete fuel pump, computer and IGN on one fuse block, and the other on another fuse block, both are backup through a back up battery with manual 30A. switch with that feed coming through a separate firewall penetration. in any case, I am always scanning for a place to land power out ;-)