[sudo-discuss] roof access / wires

[Steve Berl]

Sorry, don't have an electric code book.

Someone out there must know an electrician?

-steve


On Sat, Jun 29, 2013 at 10:47 AM, Hol Gaskill <hol at gaskill.com> wrote:

> all sounds good - we should avoid having ground loops where possible since
> it could throw off low voltage signals if there is strong EMI.  do you know
> offhand a good electrical code reference?  i have ugly's manual but haven't
> really done much with it...
>
>
> Jun 28, 2013 11:04:08 AM, steveberl at gmail.com wrote:
> Also need to consider grounding/lightning protection for anything on the
> rooftop.
> >Best bet would be to use any existing AC power that is already up there,
> and save this drop for low voltage, data, RF, etc. Ground everything to the
> AC power system ground that is hopefully already up there.
>
> >I assume the old (steam?) pipe is metal? It would be good to figure out
> if there is electrical continuity from end to end of the pipe. If it is,
> then grounding one end to the building power ground should be sufficient.
> If the conduit is not electrically continuous from end to end, it might be
> best to make sure both ends are grounded, or find out where the gap is and
> bridge across it with some kind of jumper.
>
> >-steve
> >
> >On Fri, Jun 28, 2013 at 9:04 AM, Steve Berl steveberl at gmail.com> wrote:
> >
>
> >Maybe a couple of RG/6 coax cables also?
> >It may not be cool to run 120VAC in the same conduit with the low voltage
> stuff. Check the electric code.
>
> >
> -steve
> >
> >On Fri, Jun 28, 2013 at 8:44 AM, Hol Gaskill hol at gaskill.com> wrote:
> >
>
>
> >Hi folks,
> >
>
> >
> Sounds like there's been some interest at various times in putting stuff
> on the roof.  I think we should install a waterproof junction box with a
> few power and data lines on the roof.  There is an old ventilation (steam?)
> port by the CNC router that I assume we could drop the cables through.  I'm
> thinking 120VAC up, 12 or 24VDC up/down for solar power, ethernet, and USB
> should suffice.  I bet there's already 120VAC up there but not sure if we
> are allowed to slurp directly.  Thoughts?  So far there have been
> discussions on mesh node, solar panels, uav control, air quality monitoring
> to name a few.
> >
>
>
>
> >
> cheers,
> >
> hol
> >
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> >
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> >
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> >
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> >
>
> >
> >
> >--
> >-steve
>
>
> >
> >
> >--
> >-steve
>
>


-- 
-steve
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