Modern boats have thousands of feet of electrical wiring in them. Unlike your house that only has AC wiring, a boat also has DC or 12 volt wiring. There are plenty of sub topics when it comes to wiring so today I just want to start by scratching the surface.
If you are a salt water boater you have probably witnessed what salt water and air do to copper wire over time. We've all seen that green powder that you find on exposed wires. Well there is a way that boatbuilders can avoid these electrical faults and that is with the use of tinned wire. It costs more so plenty of builders don't use it. Sabre does. Our wire suppliers take the common copper wire and they draw that wire through a bath of tin prior to enveloping it in the plastic outer casing. The result is a wire that is highly resistant to corrosive failures. It's the right wire to use in a boat.
In this image our electrician Bob, is pulling wires for the Sabre 40 sedan's electrical system. He has hundreds of wires to pull and in order to identify each one, he will label the ends of each wire with a number that corresponds to the label at the other end. The owner will have chart attached to their electrical panel (and also in the owner's manual) that clearly identifies each wire. In the event of an electrical problem, fault tracing is far simpler and less time consuming.
More on wires and electrical systems as the boat gets closer to completion.