My first post, so be gentle.
I have been reading about grounding and I have found that there are a lot of recommendations out there. Here are three that I came up with. I did this with some knowledge of electronics
engineering, including ground fault detection, longitudinal balance, return loss, transmission
lines, etc. I also have built electronic test systems where grounds were a relative thing and the test systems had to be green wire protected.
So here we go, for better or worse. Please respond at will.
through fittings should be electrically isolated to avoid galvanyic corrosion
. If it is true that lightning will find a path through any metal object, then a gounding wire attached to a metal hull
through fitting will direct current
to additional items which are connected by the ground circuit. This doesn't seem like a good idea. Why not let the fitting that got struck take the hit and spare the rest of the boat. Also, isn't the gound wire at sea ground? The hull fitting is already at sea ground.
(2) The lightning prection system should be the mast
, forward stay, highest shrouds and keel
. These should be isolated from everything else. I do not see the benefit of including the rear stay as I will be standing next to it and I don't want lightning to travel down a skinny wire next to my head
(3) I can see no reason to ground the DC system. It is an isolated system runnning on batteries. Why connect it to the AC or the sea? This just leads to opportunities for galvanic erosion and adds complexity. We don't ground flashlights and lanterns? Our cars aren't grounded to the road.
The way I see it, here are three independent systems, Shore Power
, Battery, and lighting
protection. None of these should be connected.
I fear my frustration is coming through in this message. I don't mean to offend anyone but I can't seem to find any science behind the advice I find.