[Rhodes22-list] Mast Running Light

[The Rhodes 22 Email List]

Your best bet is to get a  digital multimeter from Harbor freight ( under
10 $). If you set up the meter like the picture that I hope to attach at
the bottom,the test goes as follows. Put the red test lead on one wire and
the black test lead on the other wire. If the display reads 12 volts, the
positive wire is on the red lead. If the display reads -12 volts the
positive wire is on a the black lead. You can also use this tester to keep
track of your battery charge,test fuses,and find out how many amps a
circuit is drawing. Never check voltage with the positive lead plugged
into the top hole marked 10 ADC.

  Jerry Lowe
Country Rhodes '86





> Thanks, Peter. At least I have some reason to be confused.
>
> Since there is NO A/C power on this boat and the age of the craft I am
> guessing the yellow is used as negative and the black
> was used as positive.  I am changing to LED bulbs which are also bayonet
> style. So I can just flip the bulbs if need be. I was hoping an ole Rhodie
> may have a history with the older Rhodes and faced this problem.
>
> I have some ANCHOR marine grade wire 16/2 and this is yellow and red. The
> label on the spool noted the yellow is negative
> and the red is positive so as not to confuse people with A/C wiring
> colors.
>
> I did notice the red and black wire in the mast were different size wires.
> The red seemed to be about a #12 and the black was about
> a #14. Was this overkill for a 25 watt bulb, running about 25 feet of
> wire?
>
> Thanks,
>
> Cary Tolbert
> S/V Whisper '86
> Radford,VA
>
> On Sat, Mar 12, 2016 at 6:02 PM, The Rhodes 22 Email List <
> rhodes22-list at rhodes22.org> wrote:
>
>> I doubt you can rely on the wire colors to tell you much.  From what I
>> can
>> find in a quick Google search ABYC standards are that both black and
>> yellow
>> should indicate negative or ground.
>>
>> Peter Nyberg
>> Coventry, CT (though today in Beaufort, SC)
>> No Boat Yet
>>
>> Sent from my iPad
>>
>> > On Mar 12, 2016, at 5:00 PM, The Rhodes 22 Email List <
>> rhodes22-list at rhodes22.org> wrote:
>> >
>> > I am replacing a, long needed, deck plug for the Mast Running Light.
>> >
>> > My question is which wire is the (+) positive. The Black or the
>> Yellow?
>> >
>> > I am thinking the Black wire is the positive and the Yellow is the
>> Neutral
>> > / Ground.
>> >
>> > Is there a Nautical Electrical Engineer in the group?
>> >
>> > Or anyone with this knowledge. The really odd thing is that the wires
>> from
>> > the mast are Red and Black. So what is up with this?
>> >
>> > Thanks! in advance for your knowledge.
>> >
>> > Cary Tolbert
>> > S/V Whisper  '86
>> > Radford, VA
>> > __________________________________________________
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