Interesting article by Nigel Calder in the October 2005 Issue of Professional Boatbuilder Networking: The 3-Cable Boat.
3-wire Wiring harnesses are coming to the marine industry! No more complex bulky runs of two conductor wire from distribution panels to devices! This technology has already been used in production automobiles for years and recently has started to appear in motorcycles (BMW).
Now if this stuff has matured by the time I get to the electrical system, I might consider it! It would certainly cut down on the costs of installation and the addition of new electrical devices after build completion.
Here are some links to some manufacturers who make these sorts of systems for RV and Aerospace:
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