28 Jun
2013
28 Jun
'13
11:04 a.m.
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(a)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(a)gaskill.com> wrote:
--
-steve
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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--
-steve