no safe modules for ground-mounted arrays[RE-wrenches]

[Matt Tritt]

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Thanks Mark; I will on both counts.

Matt

Mark Frye wrote:

>Matt,
>
>NEC 2008, 690.31 (A),
>
>read it and weep.
>
>MPF
>
>-----Original Message-----
>From: Matt Tritt [mailto:solarone at charter.net]
>Sent: Monday, January 21, 2008 10:15 AM
>To: RE-wrenches at topica.com
>Subject: Re: no safe modules for ground-mounted arrays[RE-wrenches]
>
>
>
>
>So now 48 volt circuits are considered dangerous as well? When did /this
>/happen?
>
>Matt
>
>Mark Frye wrote:
>
>  
>
>>Matt,
>>
>>I am not sure about your reference to 48V, but the new Code applies to
>>"circuits" operating at a max voltage above 30V.
>>
>>Only 12V and 24V nominal systems are exempted from the raceway requirement
>>when readily accessible.
>>
>>MPF
>>
>>-----Original Message-----
>>From: Matt Tritt [mailto:solarone at charter.net]
>>Sent: Saturday, January 19, 2008 4:51 PM
>>To: RE-wrenches at topica.com
>>Subject: Re: no safe modules for ground-mounted arrays[RE-wrenches]
>>
>>
>>
>>Holy Smokes! According to this reg, and if applied to ground mounted PV,
>>the mounting pole would need to be about 15' above grade. Has anyone
>>else on this list noticed the level of absurdity possible when following
>>a "logical" train of thought?  The biggest worries we used to have
>>concerned keeping horses and bulls away from installations, and not
>>falling from a roof, now it's technology proliferated to the point where
>>hazards to humans is the worry because of the high voltages (or
>>paranoia) involved.
>>
>>If accessible PV wiring is 48 volts or less, the problem goes away. Or,
>>to blaspheme, maybe the US could join the rest of the world and use
>>something other than the NEC to govern electrical practices. Please,
>>anyone; how many of you, or anyone you know even remotely, has been
>>injured or killed by any wire on the back of an array?
>>
>>If this all goes where it seems to be headed, the cost of PV could reach
>>a point that puts it out of the reach of even more people, and the only
>>companies able to accomplish installations will be the ones that can
>>afford the hugely expensive insurance policies that will materialize to
>>cover the "perceived" liabilities involved.
>>
>>Oh, for 1980!
>>
>>Matt T
>>
>>
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