Viola!
This is my new panel. I have 10 individual relays, 4 fuse "packages" for the 4 styles of power, a main busbar with positive and negative sides, then 2 massive 75A relays to switch the power to the fuse "bundles" from the ignition switch signal.
Instead of having all of the amps that feed a few fuses actually go through the ignition switch terminals, it will instead feed through those relays, with the switch only triggering it (sub-amp levels).
The fuse panels are 2 styles. The 3 of the left have been seen here before, they use a single feed in the center to power 6 fuses each. So, 3 panels for the 3 styles of power (always hot, hot on acc/run. hot on run/start). The 4th fuse panel on the right is a classic series of discrete fuses for the lighting.
Equipment:
4AWG cables coming in from the battery (two, red and black, positive and negative). They feed everything.
Busbar: Blue Sea 2722, 150A capable on each side, with a cover. Several mounting options.
Big Relays: Tyco 75A relay, V23232-D0001-X001. NO, SPST, 75A continuous.
Relays: Mix of Tyco SPST and SPDT as needed. The bases are shown, the relays aren't installed yet
Fuse panels: CE Auto Electric Supply, FPATC6 and FPATC9M panels. 40A each fuse, 150 A each panel, made in the USA.
8AWG wires feeding each big relay, 18AWG wire for the signal and ground of each relay, 14AWG supply and load for each relay.
10 relays, each has a separate color scheme. Fuel Pump, Power Windows, Cruise Control, Horns, Low Beams, High beams, Interior Accessories, Main Aircon, Evaporator fan, and a spare. 5 of them have power fed directly from the busbar as needed and are triggered from outside sources, while 5 of them get power from one of the bused fuse panels, then feed switch sources.
All said and done, there are about 50 wires coming IN, that need to be tied into this assembly.