garmin gap 26 pitot (heated and regulated)

[rdamazio]

Exactly, and remember that if you're running the ground back to a central grounding block you need to count the full length (from power source to device to ground).

Mine was at about 21ft total, so I gave myself some margin and went with the 12.

[rdamazio]

About the connector, I'm using TE AMP CPCs from their series 4, which has both high-current and low-current pins. (assuming that the connector, being ~close to the fuel lines, would be the worst place to have a fire start).

[rocketman1988]

So I assume that those using the larger gauge wire are not using a VPX?

If you are, how did you get the #12 wire to work with the VPX pin?

[rdamazio]

Haven't gotten to that problem yet but do plan to use the VPX Pro.

[rocketman1988]

I have been speaking with the avionics folks and apparently the #12 will not fit the VPX terminal, which has a maximum wire size of #14.

#14 wire will carry 15 amps continuously with an acceptable temperature rise and no smoke.

Couple that with the given distance in the -10 of right at 12 feet and a maximum current draw for the GAP26 of around 12 amps and it is reasonable to use #14 wire...

Certainly nothing wrong with #12 if you can make it work, though...

[BrianDC]

Originally Posted by rocketman1988

I have been speaking with the avionics folks and apparently the #12 will not fit the VPX terminal, which has a maximum wire size of #14.

#14 wire will carry 15 amps continuously with an acceptable temperature rise and no smoke.

Couple that with the given distance in the -10 of right at 12 feet and a maximum current draw for the GAP26 of around 12 amps and it is reasonable to use #14 wire...

Certainly nothing wrong with #12 if you can make it work, though...

This is where I'm currently stuck. Was thinking of putting my GMU 11 magnetometer on the left wing. Issue I'm concerned with is the interference from the pitot power ( as Rodrigo mentions). This means twisting the ground wire back to at least the wing root if not farther into the fuse. Which leads to needing a larger wire and incompatibility with the VPX (at least out of the box). UGH!
I guess enough people have had success mounting the GMU 11 (or 22) in the tail so that's my next thought. Feel like I'm driving myself nuts trying to pre-plan and run wires earlier in the build and may just have to wire as best I can and then make adjustments as I get near the finish line. Appreciate all the info everyone is sharing.

[rocketman1988]

As previously posted, I am doing my avionics wiring. The avionics shop has, based on their experience with the rv-10 installs, recommended installing the GMU22 in the tailcone, one bulkhead behind the baggage area bulkhead.

They are also recommending #14 wire for the pitot.

I specifically asked about the GMU placement and they said that the vast majority that have been installed in this location have had no issues. Though there have been some installs that have not worked in the tailcone, it seems to be due to the individual aircraft rather than the general location.

I am accepting their recommendations based on their experience with these installs. Once operational, I will post another data point...

[BrianDC]

Thanks Bob. Sounds like may be the way I end up having to going as well.