May 14, 2010 22:58
Well, I had already spliced the red and black before the two previous posts in this thread, so I took it to the boat and tried it that way. Despite the notes' warning about the mac not booting without the isense wire, it definitely does run without it.
The shield is indeed confusing, as is the whole subject of grounding. The entire boat is grounded to the engine and keel cooler, and most ground wires just tie into a negative bus bar, which is also tied to the engine. If I understand this installation correctly though, I should attach the wire shield to the negative bus bar because the red and black wires of the power supply output don't allow stray currents to leave the computer. It's like a relief valve.
I haven't attached the shield to anything yet, but I can easily run another wire past the power supply and back to a negative bus bar.
The shield is indeed confusing, as is the whole subject of grounding. The entire boat is grounded to the engine and keel cooler, and most ground wires just tie into a negative bus bar, which is also tied to the engine. If I understand this installation correctly though, I should attach the wire shield to the negative bus bar because the red and black wires of the power supply output don't allow stray currents to leave the computer. It's like a relief valve.
I haven't attached the shield to anything yet, but I can easily run another wire past the power supply and back to a negative bus bar.
Edmund