CharlieWaffles
Well Known Member
I am looking at the wiring for the Garmin GTN 750 and one of the diagrams (E-4) shows a fuse/Circuit Breaker on some ground wires. See the bottom three pins in this diagram. Is this just a typo?
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Garmin Ground Wire Fuse/CB?
- Thread starter CharlieWaffles
- Start date
az_gila
Well Known Member
Yes minor typo on the bottom three wires. They just cut-n-pasted from the power lines.
The point they were trying to make was 20g wire for a 28V system and 18g wire for a 14 V system on both the ground lines and the power lines.
For the bottom three pins it should read
20 AWG (28 VDC system)
18 AWG (14 VDC system)
You should check what note 3 - the 3 inside the triangle - says though.
The point they were trying to make was 20g wire for a 28V system and 18g wire for a 14 V system on both the ground lines and the power lines.
For the bottom three pins it should read
20 AWG (28 VDC system)
18 AWG (14 VDC system)
You should check what note 3 - the 3 inside the triangle - says though.
Last edited:
CharlieWaffles
Well Known Member
Thanks, that's what I figured. Note three just says all power leads are needed.
LeeM_2000
Well Known Member
This is not a typo. The C/B and voltage call-out helps you verify the ground wire is the correct gauge. This is just a way of reinforcing/reiterating the relationship between the wire gauge, volts, and current rating because getting this wrong would be potentially very bad.
CharlieWaffles
Well Known Member
It must be a typo, none of the other ground wiring in this or other diagrams show a CB/Fuse. Sure they will show a gauge to ensure its the same as the power source, but the inclusion of the CB must be wrong.
