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What size anl fuse do I use?

Howdo I know what size fuse or circuit breaker to use for my amps for my subs ??

  • How do I figure out what size fuse or breaker to use?? Im running 2 rockford p4002's and 1 small amp for 6x9s . Im thinking about getting a curcit breaker ...help ;) thanxx

  • Answer:

    Add up all the fuses on your amps, and that will give you the rating you need. up all night- The problem with that is this: Say you have a 1kW amp. According to ohms law it would draw 83.33 amps at 12 volts. This is not a perfect world though, the amp draws more current than that because some of the current is wasted as heat. So if you have an amp that is only 60% efficient, in order to produce the 1kW it would actually need to draw 116.66 amps. If you know your amps efficiency ratings it is fine to do it by that method, otherwise you are just guessing. Besides it is easier to just add up the total fuse rating on all the amps anyways.

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Add up the fuse ratings of all amplifiers. Assuming, for instance, each subwoofer amplifier has a fuse rating (get this by simply looking at the fuses on the amplifier) of 40 amps, and your small amplifier has a fuse rating of 15 amps: 40 + 40 + 15 = 95 amps circuit breaker / fuse at the battery

casaudiotc

Or, you could just add up the amperages of all of the fuses that came with each amp, then get the circuit breaker that is closest. If you can't get an exact match, go with a slightly higher amperage breaker.

alchemist_n_tx

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