Roniszoro, maybe this will help w/ your question about wire size - this is also a side comment about R'marine support....
My Story is - (This is a roundabout way to answer your question.)
1) You need to realize up front that the cable that comes with the radome, is the cable that has the connector to
plug into the (at least
my)
chartplotter. That is, it's radome-to-plotter connectors. 2) If you find that cable too short to get from the radome to the plotter (as was my case) you will need an extension cable. 3) The extension cable's connectors are male and female radome - that is, radome-to-radome. There is no way to
plug the extension cable into the plotter. So if you already have the radome-to-plotter cable in a
mast, it has to come out, and the extension cable run up (as was my case) 4) R'marine's
documentation of the fact that the extension cable will not plug into the plotter is very poor, at best. I told their factory rep in SW
Florida that, and he argued that is was quite clear. So we agreed to disagree, agreeably.
Now, 5) the power is fed to the radome from the chartplotter end of the radome-to-plotter cable. So ya gotta believe that R'marine has sized that wire to run the radome with at least 1 original, and 1 extension cable in place. (There is some statement in the
documentation about how long the entire cable run can be, maximum.)
6) When I brought power to the cockpit/helm for the plotter, radar, and
autopilot, I brought 3 circuits of #10 gauge wire from the
electrical panel. So the answer from my perspective has to be - #10 wire runs the radar just fine. The #10 from the
electrical panel is spliced directly into the radome power wires coming from the R'marine cable.
Hope this helps....
PB