AC & DC in same conduit

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  #1  
Old 01-19-08, 04:55 PM
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Wink AC & DC in same conduit

I am installing a electric solar panel system.
It consists of 5 strings of panels wired back to a power inverter mounted in my basement, from there to a disconnect switch mounted next to my meter and then back to my panel also in the basement. 4 of the strings come from my roof on the house thru PVC conduit to the basement into the inverter the last string comes from my roof on my detached garage. My question is can I run 2#10 THHN wires from my solar panels on the garage thru the same 2" pvc conduit buried connecting my house to the garage? I presently have 4#6 wires (2 hot, 1 neutral and 1 ground)feeding a sub panel in the garage inside the conduit now. The solar panel wires will be carrying up to 360 Volts DC
Thanks for the help
Ed
 
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Old 01-19-08, 05:57 PM
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no they can't

Sorry to tell you this but you need a new condit run
Article 690.4(B) of the NEC states: Photovotaic source circuits and Photovotaic output circuits shall not be contained in the same raceway, cable tray, cable, outlet box,junction box, or similar fitting as feeders or branch circuits of other systems, unless the conductors of the different systems are separated by a partition or are connected together
 
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Old 01-19-08, 08:42 PM
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solar panel instillation

I was afraid that was going to be the answer, although I thought the problem were more likely to be the ac vs the dc current in the same conduit.
Thanks for the education. Looks like I am going to dig again. Little tough to do now because the ground is frozen. Luckily spring is not that far away.
Thanks again
Ed
 
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