Hi I have a backup camera and a rear view mirror monitor that I want to install in a car

The backup monitor puts out = 1 to 1.5amps 12v

The backup camera puts out = I believe 300ma 12v
It's the size of a penny

The wire being used is 16 AWG i'm going to use a fuse tap and I need to know what size of use is needed please



Thank you

 

Take your pick:

Most fuses will operate at more than 100% of their rated current before opening.


Data for Littlefuse 3AG.

I'd pick 2A and 0.5A.

 

Ok thank you what If I was to tie both camera and monitor on constant acc hot in fuse box
And just use a t so they share the connection

Would a 3amp fuse be good?





I was watching a guy do this but he used 7.5amp fuse I thought that was too high

 

3A fuse is OK. The fuse is there not to protect your camera but to prevent a fire in the car.

 

The fuse is there to protect the wiring, not the units attached to it . 16 gauge wire will handle at least 10A, so a 2A or 3A fuse should be fine.

 

The fuse is there to protect the wiring, not the units attached to it . 16 gauge wire will handle at least 10A, so a 2A or 3A fuse should be fine.

So just wondering sorry for bugging you guys but is 7.5 amp fuse to big that the guy used or your saying since the 16awg wire is able to handle it then it will protect from a fire

 

Sometimes people use what they have on hand.
It is preferable to use a fuse amperage close to what you need. 3A looks good to me.

 

In general you want a fuse to be sized ~125% or more of your maximum continuous load and it shall be small enough to protect the wire being used..
In general for 16AWG wire anything less than a 10A fuse is just fine..

 

In general you want a fuse to be sized ~125% or more of your maximum continuous load and it shall be small enough to protect the wire being used..
In general for 16AWG wire anything less than a 10A fuse is just fine..

Another question sir

If the product already has a fuse like a box attached to it with me putting in a fuse tap will that mess up things

Do fuses add up on a single circuit?

And what is the difference with a fuse tap and a inline fuse is the difference just that a fuse tap plugs into the box and inline is hooked inline of the wire? Just wondering thank you

 

Do fuses add up on a single circuit?

And what is the difference with a fuse tap and a inline fuse is the difference just that a fuse tap plugs into the box and inline is hooked inline of the wire? Just wondering thank you

Lowest value fuse will open first. That makes all higher value fuses unnecessary.

 

Lowest value fuse will open first. That makes all higher value fuses unnecessary.

Yes and no. If there's only one load, then that's the case.

But often there are multiple loads that might have their own individual fuses but that share a single higher-valued fuse further up the line. That's especially the case when you have a larger wire servicing multiple loads with smaller wires in which the normal operation is that only some of them will be on at a time. A moderate current might exceed the fuse for an individual load, but too many loads may blow the common fuse even if each load by itself is below it's fuse's rating.