Most Esteemed Wrenches,
Peak Copper?
Please read:
http://en.wikipedia.org/wiki/Peak_copper
http://en.wikipedia.org/wiki/Bauxite
http://www.guardian.co.uk/world/2010/aug/23/miners-trapped-alive-chile
There's a copper Superfund site 30 miles from my home here in VT.
Let's use our resources wise
Matt,
Thanks for the reply. I should have clarified, but I am talking about a
standard grid-tied, non-backup system.
I'm still not quite sure I have any solid code sections to back up my
assumption that it is OK to tie the inverter GEC to the nearest steel, rather
than running all the way back
_
From: Mark Frye [mailto:ma...@berkeleysolar.com]
Sent: Sunday, August 22, 2010 6:58 AM
To: 'RE-wrenches'
Subject: RE: [RE-wrenches] useful info on wire color coding
Too lazy to look myself, but maybe one of you guys with an electronic
version of the Code can search for it: a requirem
My 2 cents on this issue which I have encountered on numerous occasions. Here
in NYC the majority of service switch installs agree with the convention of
BLACK, RED, BLUE. However, I have seen a few older service switches with the
reverse, BLUE, RED, BLACK.
The only documented place I have ever
All,
In reality is is easy to find faults in underground feeder wire.
A tone trace device is installed on the feeder and a triangulation "A
Frame" is then used to find the fault. It is accurate within inches.
Have photos of device (3M Dynatel 2250) and failed aluminum wire if
interested. Extreaml
HI all
it is referenced several times.
First 110.15 "Orange or other marking ect"
408.3E Panel boards
409.120 Industrial panel boards
430.80-84 (MCC) Motor Control Centers
Part of this is from memory, I do not have my code book handy, and as always my
memory is not so good
--- On Mo
Wrenches,
A recent news story about "Self-cleaning technology from Mars can keep
terrestrial solar panels dust free" at
http://www.ecnmag.com/News/2010/08/Self-cleaning-technology-from-Mars-can-keep-terrestrial-solar-panels-dust-free/
said "A dust layer of one-seventh of an ounce per square yar
Hi Jason,
I'm a little confused about your intention. I think you might be making this
harder than it needs to be. Everything you need is right there in 2008 NEC
690.47(C).
Where are you tying into the building AC distribution system? Get your GEC
the same place the existing AC distribution sys
With most of our systems being sold in an urban setting, we have found that
-- without a doubt -- proximity to a freeway, any freeway, is the single
most important factor contributing to accumulation of dust/dirt.
I can't tell you exactly where to draw the line, but 500 feet puts the
system within
Hi all I screwed up again
the code references are
Hi leg color 110.15
phase location
panel boards 408.3E (left to right ABC with B phase if there is a hi
leg B phase)
industrial panel boards 409.102B (same)
MCC motor controllers 430.97B (same)
Before the code change the Hi-l
Hi All.I can't find it in any of the manuals for grundfos.does
anyone know if the wiring to the float switch carries current or not. The
float switch has 3 #14AWG wires...I need to add about 700 feet of wire
from the CU 200 controller to the storage tank.I want to use
#18AWG..i
I think the issue is that some installers are wanting the supplementary
electrode for the array tied to the building grounding system in two places. I
saw this in BIll Brooks seminar too, but then he said it wasn't necessary.
Basically the EGC system already ties both electrodes together as requ
Please correct me if I'm wrong, but to summarize this issue:
1) code requires clockwise phase rotation in Panel boards, and AC disconnects,
2) even though it's not code required, it is good practice to tape those wires
black, red, blue, again left to right or clockwise. (as long as you're in the
Kirpal,
If you use 18/2 shielded tray cable (with all the proper insulation
ratings of course) you can
run that for thousands of feet. 700' is about our average run on the
majority of our pump
systems and it works well for us.
My wire is by Omni, part
The Grundfos switch is voltage only. I'm not sure I would run it 700 ft or not,
regardless. For that distance I would probably install a float switch in the
discharge tank that shut off the inlet flow and backed water pressure down the
pipe to a pressure switch located close to the pump. As the
Hiya Kirpal,
They are just signal wires from the CU200.
Cheers, Bob-O
On Aug 23, 2010, at 1:54 PM, Kirpal Khalsa wrote:
Hi All.I can't find it in any of the manuals for grundfos.does anyone
know if the wiring to the float switch carries current or not. The float
switch has 3 #14AWG wir
We just use the inexpensive 18/2 sprinkler wire found just about anywhere
for runs up to 2000' -- over that, go with the shielded.
Another way to go about super long runs might be to use a radio transmitted
float switch. Have yet to try it, but they look nice and as I recall only a
couple hundr
THANK YOU ALL FOR THE FAST QUICK RESPONSE.SOLVED MY AFTERNOON...!!!
Cheers,
Kirpal
On Mon, Aug 23, 2010 at 9:04 PM, Mark Dickson wrote:
> We just use the inexpensive 18/2 sprinkler wire found just about anywhere
> for runs up to 2000’ -- over that, go with the shielded.
>
> Another way to g
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