1 Amp fuse in 15 Amp spot

Madocian · May 25, 2016

I came across this post from lincow (member). Looks like the same thing I have have going on.

Thanks. One of my fuses near the rocker switch is 1 amp and the manual says all are 15 amp. I may have to give up and take it to some one to fix.
Thanks for your help
lincow

Can someone explain why I have 1 amp fuse in a 15 Amp spot? Should I put a 15 Amp in there?

JackandJanet · May 25, 2016

I THINK, if that's the feed to the "monitor", it's just carrying current to the tank levels and the battery condition indicator. Those are all low draw items I believe.

In any case, if things work and the fuse does not blow, you don't need to do anything about it. It's never harmful to install a fuse that has a lower rating than specified. It just means that it will act more quickly in case of a malfunction such as a short circuit. What WOULD be dangerous would be to install a 20 Amp fuse in place of a 15 Amp one. That would reduce your circuit protection.

- Jack

underpsi · May 26, 2016

JackandJanet said:
...In any case, if things work and the fuse does not blow, you don't need to do anything about it. It's never harmful to install a fuse that has a lower rating than specified. It just means that it will act more quickly in case of a malfunction such as a short circuit. What WOULD be dangerous would be to install a 20 Amp fuse in place of a 15 Amp one. That would reduce your circuit protection.

- Jack

Spec is for maximum 15A fuse. What that indicates is that the circuit wiring and components are capable of carrying 15 amps. What you are protecting with the 1 amp fuse is the circuitry in the monitor and its peripheral devices. You get a greater level of protection if something short circuits because a 1A fuse will fail sooner than a 15A fuse will, and hopefully saving your monitor from a complete meltdown.

Madocian · May 26, 2016

Awesome replies, Thank you so much.

Stroker920 · May 28, 2016

A short circuit theoretically produces an infinite amount of amperage so, if there was a short, you would not notice a difference in opening time between the 1 amp or the 15 amp fuse or a 100 amp fuse for that matter. I would guess the 1 amp fuse is to protect the LED's on the tank level and battery display. However, if your not having issues with blowing fuses then I would not worry about it.

Mike

1 Amp fuse in 15 Amp spot

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