[Public-List] Re-wiring

[mahseer at kos.net]

A wire run should be measured from the distribution panel back to a common
ground buss at the panel.  Wires from the battery to the panel should be
sized for max current drawn and voltage drop for all circuits.  Each
individual circuit will less than this.  I am not in favour of running
cables through a conduit I believe and have read of incidences where heat
has been generated and caused fires, also running multiple cables causes
them to twist making it next to impossible to add others plus you have a
limited number of wires that can be put in conduit.  If you do decide to
use conduit and use a common ground (DC negative) make sure it is sized
for all circuits max current drawn.  Finally I see no reason to run AC
through out an Alberg30.  I have one AC GFI just passed my 20 amp dual
disconnect that is used in my galley , the load side feeds one duplex that
feeds my 12/120v fridge and my correctly sized battery charges everything
else is 12 volts.

John Boor
MAHSEER #380

> I've rewired my entire boat except for the engine and mast. All the advice
> about crimps etc is spot on IMLTHO. Two things I'll add are:
>
> 1. Ancor has charts for figuring out what size of wire to use for each
> run.
> DO NOT guess how long the run is; you will be wrong. Run a fish tape or
> test wire and measure it. A run is measured from the battery, to the
> breaker panel, out to the device, back to the panel, and finally, back to
> the battery.
>
> 2. Home Depot carries flexible conduit in orange and blue. Orange is for
> DC
> and Blue is for AC. It works well if you plan things out and don't try to
> make sharp bends. The conduit will bend but it become really hard to do
> the
> wire pulls if it's bent too much. Leave gaps for drainage. Two cool things
> about the conduit. The AC and DC circuits are clearly separated. When I
> want to add a circuit I just pull the wire. I don't have twenty plus zip
> ties to cut and replace. The wire is also support along it's entire length
> as opposed to just at the tie bases. (Ok, so that three things...)
>
> Greg
>
> S/V Ayla
>
>
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