Originally Posted by Dockhead
The root problem is that there are two negative buses which feed separate groups of equipment
. I could cut the connection between one set of batts and one of the busses, feed it back up to the other bus with a heavy cable, then tie back to the first bus with another heavy cable, but this would introduce long cable runs for heavy power consumers (10 horsepower bow thruster) -- definitely not a good idea.
My through hulls, mast
, etc. are not bonded -- per modern practice.
Reading back, you have two banks now, a 12 V and a 24 V bank. Not sure I followed your above description on what you propose possibly cutting and feeding back. How much voltage do you measure between the two negative bus bars, typically ? How far apart are they, physically ? I take it you want to joint these two bus - sides, and I'm saying you should be able to determine with a meter if they are electrically floating from each other. On another point, though, if they are seemingly at the same potential on their negative sides, it could be through a piece of equipment
or housing that you didn't intend to be the 'bridge'.
On your bonding system, are you keeping everything under water
isolated from each other item, such as prop shaft from transmission
, rudder-quadrant-cables-pedestal from the engine
, etc, or just the individual bronze through hulls isolated ?
On the mast
, how do you eliminate the buildup of static electricity in stormy conditions ? Your SSB
ground plane plate is bonded to the mast base, correct ?
Think about the steering
quadrant for a minute, with its engine
controls and chain to the rudder
quadrant. It is connected to the engine / transmission
via the wire control cables
. It is connected to the rudder
post via the chains, unless it is hydraulic. Unless you have a drive-isolater between the transmission flange and the propshaft coupling, the prop and shaft are also bonded to the engine and rudder post, effectively.