DC disconnects [RE-wrenches]

[Dean T. Newberry]

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Hi Allan,

I like the Siemens GNF321NR Disconnect Switch, 250VAC
My building inspector won't let me use it for DC on systems that 
approach 250 VDC,
nevertheless is is a good switch. Available from Siemens website, and 
your local Electrical Distributor.

cul  deant

Allan Sindelar wrote:

>Wrenches,
>What have you found as good, inexpensive DC-rated (up to 50 or 125V DC--most
>are either 250 VDC or 600 VDC anyway, if they're DC-rated at all) unfused
>and Class R-fused disconnects for assembling small (cabin-type) PV systems?
>Extra big enclosures are worth extra points, to mount shunts, etc.
>
>2-pole unfused:
>
>2-pole fused:
>
>3-pole unfused:
>
>3-pole fused:
>
>We sometimes use circuit breaker load centers (QO2-4/70S or QO6-12/100S)
>with a Class R fuse inside for AIC protection, but I'm just looking for
>other inexpensive solutions that are OK for DC applications.
>
>Thank you
>Allan at Pos E
>
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*Dean T. Newberry*
Solar Systems Specialist
436 D Street, Davis CA, 95616
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Email: deant at dcn.org
Web: CCEnergy.com
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