I'm trying to figure out the correct fuses for powering a 400 watt inverter, (800 peak), and a 150 watt PSU. 950 watts divided by 12 volts would be 79 amps, right?

I was told on the main power lines using 4 gauge wire, I can put 125 amp fuse, right?

In the pic below fuses 1 and 2 I have a 125 amp fuse, right?

Fuse 3 is before the 400 watt inverter, which is pulling 66 amps, so an 80 amp fuse, right?

Fuse 4 is before the 150 watt PSU, is pulling 12.5 amps, so a 15 amp fuse, right?

Fuse 5 is before the computer, pulling 150 watts I guess, so a 15 amp fuse, right?

Fuse 6 is before the playstation2, it pulls 76 watts, so an 80 amp fuse right?

Next question is about wiring the relay. Would this be the correct way?

Two more questions, the switch I want is for 12 volts, and says 20 amps. Is that ok with a 200 amp relay? What size wire would I run from switch to relay?

I was told on the main power lines using 4 gauge wire, I can put 125 amp fuse, right?

In the pic below fuses 1 and 2 I have a 125 amp fuse, right?

Fuse 3 is before the 400 watt inverter, which is pulling 66 amps, so an 80 amp fuse, right?

Fuse 4 is before the 150 watt PSU, is pulling 12.5 amps, so a 15 amp fuse, right?

Fuse 5 is before the computer, pulling 150 watts I guess, so a 15 amp fuse, right?

Fuse 6 is before the playstation2, it pulls 76 watts, so an 80 amp fuse right?

Next question is about wiring the relay. Would this be the correct way?

Two more questions, the switch I want is for 12 volts, and says 20 amps. Is that ok with a 200 amp relay? What size wire would I run from switch to relay?

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