Ground Fault using SG/DG weatherproof boxes [RE-wrenches]

[Matt Tritt]

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Or is it yet another reason to use adequately sized Carlon boxes and/or 
OB Combiners? Considering the trend of most module manufacturers to 
switch to MC connections, wouldn't it be a better idea to find ways to 
accommodate their reality than ways to avoid it? Using Europe and Japan 
as models of how the world of PV is developing, I would be really 
surprised if any modules will even be available with J boxes withing 5 
years.

Matt T

William Miller wrote:

>Randy:
>
>Here is yet another reason to avoid the use of MC cables!  Just say no.
>
>William Miller
>
>
>
>At 12:16 PM 3/17/2006, you wrote:
>
>  
>
>>Wrenches,
>>We use outdoor rated SG and DB boxes and blank covers when we have
>>strings dispersed across a flat roof to transition from MC wire.
>>Recently, I had an inspection of a 3kw system where the inspector took
>>off the cover of a single gang, waterproof box and caused a ground fault
>>when he put the cover back on.
>>
>>The reason for this is the box cover screws are =BE=94 which is
>>unnecessarily long. When the inspector wedged the taped split bolt back
>>in the box he positioned it directly behind the screw hole. The screw
>>bored through a thick layer of tape like butter to the split bolt
>>causing the ground fault.
>>
>>
>>
>>    
>>

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