[Alberg30] anchor light wiring

[George Dinwiddie]

An Aqua Signal series 25 light uses 10 watts.  At 12 volts, that's a 
little less than 1 amp.  (watts = volts * amps)

16 awg wire is about 4 ohms per 1000 feet.  The run from the electrical 
panel to the top of the mast and back is probably less than 100 feet as 
a guess.  So, the round-trip resistance would be about 0.4 ohms.  At one 
amp, that's a 0.4 volt voltage drop (volts = ohms * amps), or a 3-1/3% 
voltage drop.

In reality, since the battery voltage is greater than 12 volts and the 
current draw is less than one amp, you'll be under the 3% voltage drop 
that's considered adequate for electronics, and considerably under the 
10% voltage drop that's considered adequate for lamps.

  - George


J Bergquist wrote:
> Dear list,
> 
> I am planning to install an anchor light at my masthead.
> 
> I am planning to use 12 gauge wire.
> 
> Does this sound right to you?
> 
> J

-- 
  ----------------------------------------------------------------------
   Hope your road is a long one.                        George Dinwiddie
   May there be many summer mornings when,       gdinwiddie at alberg30.org
   with what pleasure, what joy,                 http://www.Alberg30.org
   you enter harbors you're seeing for the first time;
                                            from 'Ithaka' by C.P. Cavafy
  ----------------------------------------------------------------------

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