[RE-wrenches] Grounding system for a shack on a frozen lake?

[Christopher Warfel]

We have developed some off grid 12/24/48 Vdc and dc/120Vac systems for 
use in aquaculture that are basically in the tidal of estuaries, far 
from shore.  We have attempted to create a earth coupled ground by 
grounding the system to copper conductors looped in the salt water.

On 8/9/2011 8:40 AM, Dave Click wrote:
> Per 690.41 you probably wouldn't need to ground it for a system like 
> this, but I like the idea of dropping a ground rod down into the 
> water. Then curve the end and find a big worm, of course.
>
> **
> 690.41 System Grounding. For a photovoltaic power source, one 
> conductor of a 2-wire system with a photovoltaic system voltage over 
> 50 volts and the reference (center tap) conductor of a bipolar system 
> shall be solidly grounded or shall use other methods that accomplish 
> equivalent system protection in accordance with 250.4(A) and that 
> utilize equipment listed and identified for the use.
> **
>
> On 2011/8/9 8:34, Drake wrote:
>> That is an amusing concept, and it sounds like a fun project. Why not
>> poke a hole in the ice and drop the rod in the water? If the water is
>> not too deep, send it to the bottom. It certainly will be below the
>> permanent moisture level!
>>
>>
>> At 01:34 AM 8/9/2011, you wrote:
>>> Sounds like a silly question but is there any way to ground a small
>>> battery based PV system serving a temporary fishing shack on the
>>> middle of a frozen lake? Around here they call these 8' x 8' (or
>>> larger) shacks "ice houses". One or more holes are augered through the
>>> ice for fishing lines. Some of the shacks get remarkably fancy, almost
>>> luxurious (in a guy kind of way). There is usually plenty of beer and
>>> snacks. Sometimes fish, too. The shacks get set in place as soon as
>>> the ice is solid (4-6" thick) and they may stay there for several
>>> months. It's a home away from home for a lot of upper midwest folks in
>>> the winter. Some like the idea of a small solar powered battery system
>>> for light, CD player, TV, etc. There's no earth around for hundreds of
>>> yards, even miles.
>>>
>>> Charlie Pickard
>>> Aladdin Solar
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>>
>> Drake Chamberlin
>> ATHENS ELECTRIC
>> OH License 44810
>> CO license 3773
>> NABCEP Certified PV
>>
>>
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-- 

Christopher Warfel, P.E.
ENTECH Engineering, Inc.
Energy Utilization Experts
(401)466-8978

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