What type of fuse for amp




















When you install an inline fuse, you can use this same type of blade fuse. The fuse itself is installed in a fuse holder, which you connect inline with the amp power line.

The other option is to use an inline barrel fuse. This also uses a fuse holder that you install inline with the power wire, but it typically takes the form of a clear or translucent plastic tube that holds a barrel fuse.

Regardless of the type of fuse, it's important to select a fuse holder that meets or exceeds the rating of the fuse you plan to install. If you determine that you need a amp inline fuse, don't install a fuse holder that's rated for only 25 amps.

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Updated on October 10, Jessica Kormos. There is a smaller version of the wafer fuse called an AFS. It has capacities similar to the MAXI fuse type. The type of fuse you use will depend on the current capacity needed and your own preference. For draws of less than 80 amps expect to use a barrel fuse.

For currents larger than that you'll probably be looking at the more expensive wafer or MAXI fuses. Fuse Size - Using the method in item two you'll be able to choose the size of the fuse you need. But what if you have a current draw that is greater than one value of fuse but less than another i. In this case you have the option of either choosing a amp fuse or a amp fuse.

I usually go for the larger fuse to reduce the chance of accidental fuse blows. However you may choose to go with a smaller fuse for greater short circuit protection. Wire "B" is protected by the amp fuse. It has to be at least 4g. Smaller wire would possibly burn before the fuse would blow in the case of a short circuit to ground.

This wire feeds all of the power to the distribution block. Wire "C" is supplied power from the distribution block. Since it's also a 4g wire, it needs no fuse. The main wafer fuse will protect it and the vehicle in case it's shorted to ground. Wire "D" is a smaller wire. It's also supplied power by the distribution block. Since this wire is smaller let's say an 8g wire , the main fuse can not protect against a short circuit. If the 8g wire shorts to ground, it will burn and possibly take the vehicle with it.

This would be a very unsafe condition. Fuse "A" is protecting wire "E". If the wire is an 8g wire and the fuse is rated at 50 amps or less, the wire is properly protected in case of an accidental short circuit. Fuse "B" is protecting wire "F". The wire is a 6g wire so it can handle more current than the 8g wire. Any fuse rated at 80 amps or less will protect the wire in case it's shorted to ground. AGU fuses aren't available for anything more than 60 amps so you'd have to have a MAXI-fuse distribution block for anything requiring more than a 60 amp fuse.

AGU fuses greater than 80 amps are not available from the two 'real' fuse manufacturers Bussmann and Littelfuse. There's likely a reason for that. The fuse configuration simply isn't well suited for greater than 60 amps of current. If you use an AGU fuse rated for more than 60 amps in a circuit that draws more than 60 amps for long periods of time, expect to have problems melted fuse holders, fuses failing but not blowing in the center of the fusible element As you can see, wire "G" is a small wire.

Some people might want to power a crossover or other low current device in the rear of the vehicle. If the wire was a really small wire like a 16g or 18g wire, there would be no suitable AGU fuse to protect it.

In this situation, you'd have to have a secondary fuse holder with a 7. A better solution would be to use a 14g or larger wire and a 10 amp AGU fuse. Sometimes, people will insert a small wire wire "I" in with one of the other larger wires wire "H" to power the crossover. Since the port that it's tapped off of is likely powering an amplifier, the small AGU fuse is not an option.

Since the port already had a relatively large wire in it because it's powering an amp , the wire tapping off of the shared port probably can't be very big. This smaller wire would absolutely have to have a dedicated fuse holder as close to the distribution block as possible. If wire "I" was shorted to ground and the dedicated fuse holder was absent, wire "I" would burn. If anything is unclear about this section, please email me and I'll try to clarify.

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