Next message: Philip: "Re: lv-ab: Stuffing Box question"
The simplest way to check if there is a leak is :
have a light bulb in a socket with the to wires
or a test light.
Disconnect the Positive (+) cable from the battery in use
and touch the first wire to the terminal and
the second wire to the red cable that you disconnected.
If the lightbulb goes on there is a leak somewhere in the system.
Check also for melted wires because of the high current.
Yanni Marinated
S/V Princess Thalia
Hamilton-Fifty Point @H3
www.yannismarine.ca
----- Original Message -----
From: "Lee Haefele" <>
To: "Steve Wight" <>
Cc: "Live-Aboard at Crux dot Astro. Utoronto. Ca"
<>
Sent: Monday, September 17, 2007 6:46 AM
Subject: Re: lv-ab: spotlight
> Incandescent bulbs have much lower resistance when cold, their true
> resistance can only be measured while operating. (So 1.4 ohms is normal
> in use, actual measured resistance with a meter will be LESS.) You need a
> clamp on meter to measure the current. It is possible the relay is wired
> wrong or that the lamp draws more than expected. If there is some voltage
> drop to the light, it WILL draw more current, due to the nature of
> incandescent bulbs. I suggest a bigger fuse. Also, every boater should
> have a clamp on DC current meter. Most clamp on meters do only AC, but
> some also do DC, $50-60 @ Sears.
> ----- Original Message -----
> From: "Steve Wight" <>
> To: <>
> Sent: Sunday, September 16, 2007 8:56 PM
> Subject: lv-ab: spotlight
>
>
>> Got a new 100w halogen, but it blows fuses. Thought I found my problem
>> when my meter showed VERY low ohms on the light, but 100 W / 12 V = ~8
>> amps, and if P = I^2*R still, then R = ~ 1.4 ohms ??? This just seems
>> very very low. The first fuse took about a minute to blow, the second
>> about 15s, the next two instantly. Does a relay fail like that? (the
>> switch feeds a relay which feeds the light)
>>
>> Steve
>> Fales, 'Gulli'
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>> --
>> No virus found in this incoming message.
>> Checked by AVG Free Edition. Version: 7.5.487 / Virus Database:
>> 269.13.21/1012 - Release Date: 9/16/2007 6:32 PM
>>
>>
>
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