Fuse size for dual amps
#12
So much misinformation....
There is no 'code' for automotive wiring (like there is for home wiring)... hence, no reference provided
In a nutshell...
Fuses are there to protect the wire again a short circuit. What this means is you need a fuses at the beginning (as close to the power source as possible, whether it be the battery, the alternator or a distribution block) of each run of a given wire size with a fuse large enough to allow the total amount of current flow needed on that branch, but small enough to keep the wire from melting
Hypothetically, if you have 2 amps, each connected to a distribution block via 8 gauge wire, each requiring 30 amps, you would need a fuse (as close as possible to the distribution block.. or better yet, a block with fuses built in) around 40 amps ( > 30A). If the distribution block is being fed from the battery by 4 gauge wire, you would need a fuse very close (as close as possible) to the battery with a fuse around 80 amps (> 30A + 30A )
You do not need a fuse at the end of the wire (close to the amp) as it won't be protecting anything because the amplifiers have their own built in fuses
BBEngineer
There is no 'code' for automotive wiring (like there is for home wiring)... hence, no reference provided
In a nutshell...
Fuses are there to protect the wire again a short circuit. What this means is you need a fuses at the beginning (as close to the power source as possible, whether it be the battery, the alternator or a distribution block) of each run of a given wire size with a fuse large enough to allow the total amount of current flow needed on that branch, but small enough to keep the wire from melting
Hypothetically, if you have 2 amps, each connected to a distribution block via 8 gauge wire, each requiring 30 amps, you would need a fuse (as close as possible to the distribution block.. or better yet, a block with fuses built in) around 40 amps ( > 30A). If the distribution block is being fed from the battery by 4 gauge wire, you would need a fuse very close (as close as possible) to the battery with a fuse around 80 amps (> 30A + 30A )
You do not need a fuse at the end of the wire (close to the amp) as it won't be protecting anything because the amplifiers have their own built in fuses
BBEngineer
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RocknSS04
Interior/Audio/Visual Electronics
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03-03-2008 01:23 PM