[Public-List] Bizzare electrical problem

[Glennb]

I can see stray electrical currents, but can fiberglass hulls conduct enough electrical energy to heat coax antenna cable to the melting point??? Never thought that was possible.

Btw,  i havent looked into the battery compartment yet - under the cockpit behind the engine- but everything is new back there this past year. Plus I did hose off the engine last spring as part of a serious cleanup following a lot of FG and wood sanding .

Gpb

Sent from my iPad

On Apr 7, 2013, at 8:54 AM, n4lbl <alan.schulman at gmail.com> wrote:

> That was true, but,,,,
> 
> http://www.thebatteryterminal.com/TechTalk_Batteries_on_Concrete.htm
> 
> http://www.snopes.com/autos/techno/battery.asp
> 
> http://www.cartalk.com/content/business-batteries-and-concrete-floors-needs-be
> 
> 
> On Sun, Apr 7, 2013 at 9:19 AM, Don Campbell <dk.campbell at xplornet.ca>wrote:
> 
>> That is the quickest way to drain a battery that sits without being
>> recharged,  and if you set a battery onto concrete,  this is the way charge
>> is lost to ground, i.e. through condensation between the battery and the
>> concrete. By setting the battery onto a piece of wood,  that breaks the
>> continuity of the water film and so maintains the charge in the battery.
>> 
>> Don
>> On 4/6/2013 2:31 PM, Gordon Laco wrote:
>> 
>>> That's good advice.   I once had a shock (pun intended) when I casually
>>> touched the probe of a multimeter to the inside skin of my boat while the
>>> other probe was touching the SIDE of one of my batteries.    There was a
>>> slight current.    I noticed everything was damp with condensation.   I
>>> dried everything I could reach and was able to kill the stray current, at
>>> least so far as my meter could detect.   If ever there was a good reason
>>> for battery boxes and good ventilation, I reckon that taught me.
>>> 
>>> Gord #426 Surprise
>>> (In Kingston Ontario doing the Antique Boat Symposium)
>>> 
>>> On 2013-04-06, at 1:58 PM, pat nolan <pnolan33 at yahoo.com> wrote:
>>> 
>>> A lifetime accumulation of salt can cause all sorts of electrical
>>>> gremlins .. I once told a guy with all sorts of electrical problems to wash
>>>> his engine room. He thought that I was nuts , but it cured his problems.
>>>> Scrub in the hard to get at places . measure with an ohm meter to check for
>>>> connections.
>>>> 
>>>> 
>>>> ______________________________**__
>>>> From: Glennb <brooks.glenn at comcast.net>
>>>> To: "alan.schulman at gmail.com" <alan.schulman at gmail.com>; Alberg 30
>>>> Public List -- open to all <public-list at lists.alberg30.**org<public-list at lists.alberg30.org>
>>>>> 
>>>> Sent: Friday, April 5, 2013 8:29 PM
>>>> Subject: Re: [Public-List] Bizzare electrical problem
>>>> 
>>>> Alan,
>>>> 
>>>> Thanks, interesting. The cooked wire does seem to be coincident with my
>>>> engine start- first time since October.  So your suggestion seems feasible.
>>>> The only thing I am having trouble visualizing is how the antenna coax is
>>>> connected electrically to the ground.
>>>> 
>>>> i didnt describe the set up completely accurately.  The antenna is
>>>> actually bolted to the aft SS pushpit, which is thru bolted to the deck.
>>>> The antenna lead comes up through the taff rail.  Would the FG hull/deck
>>>> conduct enough electricity to carry the resistance to the pushpit then back
>>>> through antenna cable? i suppose the physical connection to the radio frame
>>>> and radio ground would transmit the ground back to the engine through the
>>>> master ground buss. Just not sure how the circuit could be made through the
>>>> pushpit.
>>>> 
>>>> I'll go check out the battery and starter ground etc tomorrow or Sunday.
>>>> The radio does have a circuit breaker on the positive, but no fuse on any
>>>> of the negative side.
>>>> 
>>>> Thanks,
>>>> Glenn
>>>> Dolce 318
>>>> Sent from my iPad
>>>> 
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