Several items:
1: This is not an actual lightning hit anywhere nearby, but 
electrostatic (or whatever one might want to properly call it) energy in 
the area, maybe a difference in potential of the earth as a result of 
lightning storms not close, by near (kind of double talk ~)  ).
2:  The weather enclosure is a light steel angle frame with corrugated 
aluminum siding screwed on. Hadn't thought about it previously, but 
maybe want to ground it to the well casing with a heavy gauge cable, say 
000, in case there was a direct hit. But there are 30' high trees nearby 
that probably would be hit first.
3: Thought more about the duplex GFCI and plain breaker. The breaker 
with or without GFCI, the black and white wires, the duplex receptacle 
with or without GFCI, and the connected load are all in series, and for 
there to be current, the current needs to flow in the circle of all the 
series connected components, and if the GFCI was at either location will 
detect the current imbalance. Or is it the parallel wires are an 
inductor/capacitor parallel with the load?
4: What's the thinking on the black and white, possibly include the 
green wire, to make them a twisted pair, or maybe I can find a shielded 
cable and pull that into the plastic conduit? Changing the conduit to 
metallic is not an option.

Apptech wrote:
>>> Wind cable in a loop of about 1 foot diameter and a few
>>> turns.
>>> Seems unlikely that it would work in this case but ... .
>>> "Real" lightning strikes do not like to transit such an
>>> arrangement and tend to blow through the insulation to 
>>> local
>>> ground somewhere on the coil.
>>>       
>
>   
>> wrap it around a grounded iron pipe perhaps? increase the 
>> inductance and
>> give it a handy exit path.
>>     
>
> Maybe, but for a real strike the iron will saturate at a 
> tiny tiny fraction of the current involved.
>
>
>
>         Russell
>
>
>
>   
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