Use relay or not for amp when the interface box provides 10amp accessory
I have a TDA7850 which I believe draws less than 1A on average for my setup (as I mentioned earlier in this thread). I heard from many people that the amp should be attached to the constant 12V through a relay. Recently I found this from Metra during a research of wire harness:
Different from most of the other interface boxes I've seen which only provide only 1amp ACC, Metra claims this one "Provides accessory (12 volt 10 amp)". I wonder whether I can use the ACC directly and save a relay. Of course I will still run a fuse in between, but eliminating a relay and relay holder will free up some space in my double din enclosure, as I originally wanted to put everything except the interface box in the enclosure.
Apart from the question whether skipping relay would be a good idea. I want to make sure I understand one more thing correctly: looking at the manual of the wire harness:
Does it mean the red wire provide 10 amp at maximum? I assume the yellow wire is a direct line to the battery like what I have been from other wire harnesses. I have this question because manuals of other wire harnesses, like this one, clearly states the current rating of the ACC wire and the need of relay if a high current ACC line is required. If the red wire of Metra does provide a 10amp 12V it will enable the possibility of saving a relay for my amp?