Should Power pins have circuit protection?

[jc2da]

I just want to verify this. In the last post, it mentions connecting the GPS to power from the screen. It could potentially be a long wire run. Do we need to bother with circuit protection or no?

There are other scenarios such as the power for the fuel transducer, trim sensors, fuel senders, etc.

Is it safe to assume all these wire runs are protected internally by Skyview, or no?

Thanks,
Jae

 

[dynonsupport]

We current limit in the unit, so you don't need to protect that wire otherwise.

 

[bbtapb]

So, then it's pretty safe to use the GPS power output to run a handheld GPS (GPSIII Pilot). Yea, I should measure its current requirement for you to provide an answer. Say it's 500mA. Would that be OK?

 

[mmarien]

As noted on this forum, you run the risk of loosing your primary flight display by drawing unessassary power from it. Each piece of equipment (other than components supplied by the SV network and the SV-GPS-250) should have their own power supply from the main/avionics bus and fuse/breaker protection for the wire.

I put in the suggested 1.5A breaker for my hard wired GPS495 and connected it to my avionics bus. The added benefit is that it turns on and off with the avionics power switch and has it own battery backup.

 

[dynonsupport]

The power to our GPS puck is 8V, and limited to 400mA.

I really don't see why you would want to run a handheld GPS that has it's own batteries off our SkyView power supply instead of the primary 12V you have in the plane.

 

[bbtapb]

It would just simplify wiring and reduce ground loop potential. There's only one pin for signal and power ground. I have a 4-pin tx/rx/gnd/pwr cable and it would just be simpler to run that one cable into the DB37 connector.

According to Garmin, it takes in 10-32v and 0.75W, but runs on 6v worth of batteries. I'll see how it acts with 8v input.

Thanks