I'm starting to gather install stuff for the FJ install. The only amp I will be installing is the x200.4 that I got from Vin (thanks again). So, I have never used a circuit breaker before, is now the time? If so how big for the x200.4? Also, I will be getting a fused distro block and using both of the inputs for the x200.4, how big do the fuses need to be for both sides?
Go with a circuit breaker!! If you ever need to work on anything all you have to do is break the circuit with a switch. Very convenient.
At least 120 amp circuit breaker since your amp's fuses require that much (X200.4=120 amp fusing) .
Then two glass or mini anl-depending on the block you use. 60 amp each times two= 120 total. 60 amp for each run.
You could also under fuse the amp, which is what I did for my X1200.1. Instead of 2 times 60 amps, I did two times 50 for a total of 100 amp fusing to the amp.