I am not exactly sure how that thing is wired, however, it appears as if the fuse in that unit is used to protect the car circuit, because in order to install that, you must remove a fuse from the fuse box, and insert that unit in it's place. Undoubtadly, the fuse also protects the signal wire that comes off of it. I think they mean that the unit can only handle 10 amps of protection, so don't put that in a spot in the fuse box where a 20 or 30 amp fuse was.Originally Posted by Cheekz185
Next, you CAN use it to supply the "accessory" signal to all of your items, as long as the amperage rating is not exceeded. If you had 120 opus PS's, each drawing 250ma when on, that is 30 amps. Yes, that is an extreme example, but you do have to keep it in mind. Also, some things draw more power then others.
Just keep that in mind.
I generally like to use the wire from the fuse box to flip a relay. Relays draw about 200ma or less of current to flip, but can supply up to 30 amps of current, and use the relay to power the "accessory" wire of my units. It is overkill, but that is how I like to do it.
I also like to test the contacts in the fuse box to see which contact has the power that enters the fuse, and which contact get the power through the fuse. I then attach my accessory wire after the fuse. In that way, if something goes wrong and the fuse blows, I do not continue to draw power through the contact with out fuse protection.