switches and circuit breakers

[HighWing]

[QUOTE=Av8r3400;65226]Just to throw a curve in the mix, I used "breaker switches" in my plane. They serve the purpose of both items and only half he space is taken in the panel.

I think this just might be the clue. The typical CB pops when over amped and pushed to reset. Fuses would be a definite advantage over these as it allows for testing various circuits independently. The CBs I chose pop, but the button can also be pulled to open the circuit - switch off power. This function I have found to be a real time saver when trouble shooting or adding things and want to check them out without those auto on items running in the background.

[dcsfoto]

I am building a 7SS/912iS using fuses.

I have a Glastar and reworked the panel to install a two screen Garmin G3X
8 years ago used all breakers

I am going fuses with the Kitfox as I have not had a breaker pop yet

David Kelm

[little rocket]

I decided to check the Fuses in the Model 4 that I recently purchased and found that some of the AGC glass fuses were 32 volt DC and some where 250 volt AC.
Did some research but still don't really understand the difference.Checked out several automotive places that sell fuses and they list both types for sale under automotive.Could someone Please explain to me in as simple of terms as possible about these 2 types of fuses.
Can I replace a 10 amp fuse in the Fox with either a 10 amp 32 Volt DC or a 10 amp 250 volt AC fuse,will they both provide the same 10 amp protection in the Kitfox?
THANKS

[Av8r_Sed]

Fundamentally, the AC fuse isn’t as good of a choice as the DC fuse in this application. In reality, it probably won’t make a difference at these voltages.

I’m not a fan of glass fuses in aircraft a) because they can break and b) because the holder clips usually are pretty exposed and can lead to inadvertant shorts. Maybe an upgrade to blade type fuses is in your future?

[PapuaPilot]

It doesn't matter which one you use. Both are rated for the same amps.

There are fast blow and slow blow fuses and you can decide which type you want dependent on the circuit it is powering. The slow blow ones can tolerate a short burst of current with out blowing. You can Google this if you want more info.

[jmodguy]

AC and DC fuses are built different. This is due to arcing when the element opens. AC circuit average voltage is zero. This is due to the symmetrical value of the voltage above and below a zero reference. DC circuit average voltage is the voltage in the circuit.
When you open a fuse in an AC circuit the voltage passes through zero volts very quickly and there is very little arcing. When you open a fuse in a DC circuit the voltage (and current) is still there, until the element has separated.
This is why production and military aircraft use circuit breakers instead of fuses.
Remember this, the circuit breaker or fuse is not there to protect your hardware, it is there to protect the wiring and prevent an inflight fire...