VHF N2K - Confusing Fusing

[Frayed Knot]

Having recently upgraded my plotter/mfd to a Raymarine Axiom I plan to add an N2K backbone to connect my existing B&G V50 VHF/AIS & later an N2K autopilot.
My confusion is with the fusing: the installation manual for the V50 specifies a 7A fuse for direct wiring (max power draw 68w - tx on full power) However, the wiring diagram for connecting & powering via the backbone specifies 5A. My concern is; would I risk blowing the fuse (for the entire N2K system) by transmitting on full power in an emergency situation?
Would it be acceptable to fit a higher rated fuse to the backbone if necessary? Am I over-thinking it?

 

[PaulRainbow]

You cannot power the VHF from the backbone. It requires that you connect it to DC power using the supplied power cable and if you want to connect it to other equipment via the N2K connection that the N2K network is also fused.

 

[Frayed Knot]

Thank you Paul. I‘m sure you’re right & that was what I expected to do, but looking at the N2K wiring diagram in the installation manual it certainly seems to show otherwise. I freely admit to a very limited understanding of such things so tend to follow instructions when I can. Maybe I’m just misunderstanding them?

 

[PaulRainbow]

Thank you Paul. I‘m sure you’re right & that was what I expected to do, but looking at the N2K wiring diagram in the installation manual it certainly seems to show otherwise. I freely admit to a very limited understanding of such things so tend to follow instructions when I can. Maybe I’m just misunderstanding them?

I'm sure too.

The N2K wiring diagram is exactly what it says on the tin, "the N2K wiring diagram", it does not show the power connections, but i can assure you they need to be made.

 

[Frayed Knot]

And made they shall be - thanks again.

 

[vas]

... and same applies to all power hungry devices (MFD, autopilot, etc) Just keep it in mind when you try to install your brand new N2K a/p fe.