sure I missed something, so hopefully others might join in as
well. (motor circuit fusing?)
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 4/22/2013 4:58 PM, Troy Harvey wrote:
Ray,
One thing I didn't unde
HA, HA, HA. you must be joking
Sorry Bruce, just we've been in this situation many times over the past
few years; It's been a real pain. I actually think the best thing might
be to pull some 175s out of service on a system upgrade for one customer
in order to use them for other customers'
Black UV resistant ties only last a few years at altitude in New Mexico
and Colorado. UV is brutal, and causes PVC conduit to discolor within 2
years. The zips will actually hold for 10+ years, but aren't really
strong. I've come back on my own work, and just yanked on them, and
popped them
I'd go for using that extra module with the damaged frame. What is the
frame damage going to do to the system?
Is it bad enough that the module could quit working later (bad edge seal)?
The voltage mismatch isn't the end of the world either, but your over
all year round performance will be bett
Modules aren't exactly constant current
devices.
They are for much of their voltage range, up to a voltage a bit
below the MPP, and then the current starts tapering down to 0 at
Voc. The entire string can only pass as much current as the
lowest current mod
Hi Folks:
I just finished up another ugly rewire project for a customer that had
another"installer" put in a Xantrex TR inverter.
We fixed numerous wiring issues, including neutral bonded to ground in 7
different places!
The issue we're having now though, is that the TR inverter output
voltage
0, 2013, at 3:44 PM, Kent Osterberg wrote:
Ray,
I've got a customer that has the same problem with a dual TR inverter system.
When we first complained, Xantrex promised they were working on a fix. That
never materialized and now the TR is out of production. It's a lousy product
cs at all they would have killed that line and
refunded everyone's dough years ago.
Bob-O
On Apr 30, 2013, at 3:44 PM, Kent Osterberg wrote:
Ray,
I've got a customer that has the same problem with a dual TR inverter
system. When we first complained, Xantrex promised they were work
Yes, Bethoven's Fifth symphony played backwards at half speed is quite
effective. However, the array direct turntable varied in speed with PV
insolation, making it hard to predict when the owner should go out to
flip the record over.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Insta
I'd echo Bob-O on this and also add that when diagnosing others' work
over the phone, it often is completely different issues when you get
there. You have no idea if for instance he's actually got the modules
wired correctly, he may have a loose connection(s) there, the parallels
may all be lo
Take a charge controller with you that is sized for that array.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 5/12/2013 11:57 PM, Ron Young wrote:
Hello all and thank you for the illuminating replies. One thing
Greetings Wrenchies;
I have had a few inquiries for larger flow rate pumps, and was wondering
what the latest on Lorentz pumps was. They show some commercial models
with high flow rates (30,000gpd) but I haven't gotten any response from
the company directly.
I have three questions:
Are there
;Mono" hand crank and electric powered
pumps in Morocco before it was ETA or Lorentz.
I'll talk to Genpro on Monday.
Thanks everybody,
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 5/18/2013 6:19 PM, M
You can plug your module specs into this:
http://www.midnitesolar.com/sizingTool/index.php
to see if the Midnite Classic might work for your configuration. At
lower array voltages, the Classic 150 can exceed 2500w arrays.
Depending on how critical the reliability of the system is, I often go
to
Our only protection at this point is
the Wrenches list. If anybody on the list is seeing premature
failures, we need to know. You folks have saved my tushy many
times in the past. For now, I've stuck mostly with Solar World,
and not had problems. I will not be
First Solar's thin film is definitely part of the industry's early onset
under performance problem.
With monocrystalline under $1/watt, I just don't understand why big
projects are still going forward with thin film.
I would only use thin film for partial shading, or curved, odd shaped
surfaces.
We just serviced an old SnapnRack install, and we found the usual: most
of the mounts had been over torqued and the SS bolts had spalled. With
a bottle of anti-seize and a torque wrench we replaced the damaged
hardware and all went well.
I like the end clamp that grabs the module from underne
First Solar was not performing to warranty within the first 2 years.
They supplied more modules, but not the additional land, racking, labor,
wiring, etc to make up for the low performance.
I've watched thin film companies come and go for 2 decades. As I said
before, I think they have they're p
Depending on the original work, I'd look at sealed batteries and leave
it alone. I've done a bunch of rewires, and you're really wasting the
customer's money to rewire 80 watt modules. ( module J boxes are so
1990s) Meanwhile those 80 watt modules have decent resell value for
small 12 v sy
I 2nd that idea. I'd just add that we have the tile extend a few inches
under the array, and then the roofer doesn't have to come back. It's
also a great look, as the Array is just a couple of inches above the
tile, so it appears to be almost flush mounted, and the tiles appear to
be continuo
I've definitely found several AC only switches burned permanently into
the "ON" position, so its a real concern. We use surplus switches
removed from old houses that are DC rated. I got a collection from
Habitat Restore. They don't say AC only, and are very loud when
switched. Pull chain lam
I'm building a small power control board this weekend, and I have a
stupid question:
Can Midnite Temp Sensors be used with Trace C40s?
They DO plug in.
I recall that Outbacks were not compatible.
Thanks as always,
--
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Maste
This seems like another well meaning but slightly awkward code
requirement. I think it would be sufficient to list the nominal battery
voltage (very important to know) and then the actual variation in
voltage is not going to be too hard to comprehend.
Knowing array Voc is also very important.
Take it off the wall, and watch out for the really short wires to the
fan on the cover you are removing.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 6/12/2013 4:16 PM, Todd Cory wrote:
wrenches,
i have a cus
Outback is hiring tech support personnel: $12 to $14/ hr, no experience
necessary.
I think more BS is in our future.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 6/12/2013 4:58 PM, Bob-O Schultze wrote:
mucho
The convention of red for positive and black for negative is not just
automotive. It is also used by all battery based inverter manus, all
battery companies, and all multimeters.
John Wiles also agrees;
red = positive, black = negative for ungrounded systems
red = positive, white = negative fo
Richard, when you use your Fluke 87 to measure Vdc, black is negative,
red is positive. The black is labeled common because the meter can also
be used for current measurements. (I have a Fluke 89)
When you start using black wire for positive, it may be allowed by code,
but there just isn't a g
Watch out for accountants who become installers. They always
thing red negative and black positive.
David Katz
Sent from my iPhone
On Jun 28, 2013, at 5:40 PM, "Ray Walters" mailto:r...@solarray.com>> wrote:
> Richard, when you use your Fluke 87
ultimeters, battery based inverters)
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 6/30/2013 9:58 AM, Richard L Ratico wrote:
Ray,
Conductors can be mislabled regardless of the system used. The accident you
described h
o switch the circuit over to AC (go
Tesla!)
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 7/1/2013 7:46 PM, Richard L Ratico wrote:
Ray,
I really DO get it. But, after 20 years of mostly working with AC,
I concur with both Mike and Richard here: keep the rails because it
should look better than all silver;
or if the customer insists, change the rails out, and get tough with
your supplier that duffed the order.
Either way you won't have some nightmare paint peeling in a year call back.
If the c
We'd need more info to figure this out.
1) Wire Size
2) Type of charge controller C 60 or new MPPT model
3) use a clamp on meter to measure actual current
4) measure voltage drop across the breaker.
This very well could just be a loose connection at the breaker either
the cable side of the brea
of before.
Another option I have not tried in cold weather, is diesels. I have
clients in warmer places with Kubotas that have offered excellent
service. I have clients in Alaska that love their diesels, but I'm not
sure what they've done to cold proof them.
Ray Walters
Remote So
Is this something else we need to put into our contracts?
"Not responsible for sounds due to normal thermal expansion and
contraction of racking, modules, and roof".
Ray Walters
Remote Solar
On 10/20/2021 2:58 PM, Jason Szumlanski wrote:
These were Black framed Axitec panels.
mit, their
regular breakers are 150 vdc rated. I only use the 300 v rated breakers
with the new FM 100 that can take 300 vdc.
Ray Walters
Remote Solar
On 10/25/2021 6:45 PM, Chris Sparadeo wrote:
Hi Jeremy,
According to the QO cut sheet the answer is 48VDC:
https://download.schneider-electric
All else fails, I just would go back to the Trace retail, give it a 10%
for being used, and call it good. $165? no one will complain about
that
On 12/10/2021 6:42 PM, Jerry Shafer wrote:
Truely it depends, if someone is looking and needing that part, the
sky is the limit, its its just
The Midnite Classic can go higher to 72v stock, and they have models
that can work with 120 vdc batteries.
Ray
On 3/15/2022 12:19 PM, larrycrutcher wrote:
Hi William,
A charge controller may not be needed if you are running the pump
direct. By designing the PV array so that the Isc is
Most carts run at 48vdc these days. They either have eight 6 volt
batteries, or six 8 v batteries. I would think that would make a good
match for power backup with a 4kw range inverter like the Magnum MS4448.
Ray
On 3/15/2022 12:18 PM, Nick A Lucchese wrote:
Not sure what the golf cart
& melted beyond use, directly at the splice. The
> rubber linemen's tape was charred and there was a direct
> short to the metal box which was at least grounded
> correctly. I tend not to use Al based on this experience.
>
> Thanks, Dana Orzel
>
> Great Solar Works, Inc
&
I usually recommend retorqueing all connectors once the panel is mounted.
Whether its an E-panel or one we built at the shop, those washboard roads can
loosen stuff that would never have had a problem
otherwise. I'm actually surprised we haven't had more problems like this, even
with internal wi
Bob's idea of strapping them together is good. We do the same thing to move
batteries on horrible washboard roads, it definitely keeps them upright.
Also, consider the altitude change in flight, as that could pressurize an
unvented battery to dangerous levels. You definitely want to keep them ven
I'd say that at this point, with all the old solar systems, flat roofs, and
snow we get in New Mexico and Colorado, that if it hasn't been a problem, it
won't be a problem.
It definitely is not going to lift the panels; worst case is that it could
build up and get past flashings, which is a prob
http://www.tecratools.com/ is a decent company to work with.
I've been pretty happy with both of my tool cases I've gotten from them. I used
the tool back pack for years, and recently got a padded flight case with tool
pallets, meters are padded in the bottom.
R. Walters
r...@solarray.com
Solar
Backwoods sells the buck boost transformers for a reasonable price.
I have to add belatedly that as bomb proof as the venerable DRs were, they
indeed never charged well from cruddy generators. I had one once that made 0.5
amps at 12 volts DC.
The culprit as you already pointed out: Peak voltage w
We don't often get to take picture, as the point of failure is hard to find,
and the entire underground line is just abandoned and a new cable is installed.
Most failures I've seen (not actually seen) were on improperly installed runs,
done by DIYers.
On the other hand, the majority of undergroun
Interesting, there isn't a code requirement to color code for phase rotation,
but it is common practice for black, red, blue to correspond to clockwise
rotation. Also notice on the DC table, that John Wiles recommends (but isn't
NEC required) color coding for a positive grounded system:
white f
I found utter world wide confusion upon more research on this issue.
http://en.wikipedia.org/wiki/Three-phase_electric_power has a table that lists
color coding for different countries, US is black, red, blue, (common
practice),
while our neighbors in Canada, use Red, black, blue.☺ Europe is co
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
Little beyond a pair of Outbacks, possibly a pair of Magnasine inverters, or a
quad stack of Outbacks.
R. Walters
r...@solarray.com
Solar Engineer
On Aug 26, 2010, at 2:41 PM, Joel Davidson wrote:
> Wrenches,
> Our customer has a fire protection pumping system that operates at 240VAC and
>
3:52 PM, R Ray Walters wrote:
> Little beyond a pair of Outbacks, possibly a pair of Magnasine inverters, or
> a quad stack of Outbacks.
>
> R. Walters
> r...@solarray.com
> Solar Engineer
>
>
>
>
> On Aug 26, 2010, at 2:41 PM, Joel Davidson wrote:
>
>
lay to Outback if the Grid
> should fail and it has a generator inlet box if a generator is avaiable to
> take the load.
>
> --- On Fri, 8/27/10, Joel Davidson wrote:
>
>> From: Joel Davidson
>> Subject: Re: [RE-wrenches] Inverter for fire protection pump
>>
Oh boy, just when we thought all we had to worry about was getting electrocuted
or falling off a roof.
The cooked dummy at the end of the last video is a very serious reminder.
Besides the arc flash gear, are there other things we should be watching for to
prevent this from happening? (we definit
I know, as Bill pointed out, that the Deltas are supposed to be mounted on the
exterior to allow the damage to stay outside of the combiner box. But I've also
seen a lot of old Deltas damaged by the sun, and seen them cracked off at the
1/2" nipple attachment point, which then leaves exposed THH
If its a large commercial array, I would consider using larger centralized
inverters, and then monitor with National Semiconductor's Solar magic
monitoring system. It has string level current taps, so (theoretically at
least) you could see a single module failure by the reduced string output.
I
I've used the Pathfinder for decades, so I'm partial to them. Great for on-site
discussions of shading issues with the customer, as multiple people can see the
shading at the same time on the spot.
I've also used their Assistant software, and it works pretty well. You take a
photo of the actual
>
> DayStar Renewable Energy Inc.
> b...@daystarsolar.ca
> 780-906-7807
> HAVE A SUNNY DAY
>
>
>
> Date: Wed, 8 Sep 2010 20:05:08 -0700
> To: re-wrenches@lists.re-wrenches.org
> From: will...@millersolar.com
> Subject: Re: [RE-wrenches] Wiley Asset
>
> B
The nice folks at BZ Products have made me small custom voltage controllers
before, for just that application.
Prices, as I recall were less than a C40, and much smaller footprint/ weight,
which is an issue on a mobile application.
R. Walters
r...@solarray.com
Solar Engineer
On Sep 10, 2010
om/solar-energy.htm
Good Luck,
R. Walters
r...@solarray.com
Solar Engineer
On Sep 12, 2010, at 9:32 AM, jay peltz wrote:
> Hi Ray,
>
> Specialty concepts makes a sealed 48v unit that I'm trying to find who I can
> order on.
>
> The C-40 is a good option, but I r
A picture is worth a thousand words, (hopefully this will upload)
Here's a traditional Ilsco Lug after less than 5 years near the ocean:
<>
IMHO, this is a galvanic reaction between the Cu, Al, and (our loser) the Lug
which became the anode.
No other corrosion was near this state of deterioration
;
> Peter T. Parrish, Ph.D., President
> California Solar Engineering, Inc.
> 820 Cynthia Ave., Los Angeles, CA 90065
> CA Lic. 854779, NABCEP Cert. 031806-26
> peter.parr...@calsolareng.com
> Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
>
>
>
> -Original Mes
cking plate.
Is this also a voltage issue, for arrays over 250 v?
I'm sure I'm missing something.
I recall you once saying that UL doesn't even use the grounding hole when
testing modules, that they just clamped an alligator clip to the frame?
Thanks for giving us the "NEC and
September 12, 2010 6:50 pm
> To: "'RE-wrenches'"
>
> Are you sure that's a ILSCO GBL-4DBT lug? I am pretty sure the set screw is
> not SS, which it should be to be the genuine part.
>
> - Peter
>
>
> Peter T. Parrish, Ph.D., President
> Ca
Maybe this should be on the NABCEP test.
R. Walters
On Sep 13, 2010, at 8:04 PM, benn kilburn wrote:
> Hopefully any crew installing PV, and familiar with this debate (which they
> should be) can easily distinguish between the GBL-4 and the GBL-4DBT. The
> weight difference is quite noticeabl
You could buy several ground rods for the cost of one Delta.
Ground Impedance is the real issue. Both the Delta and the Polyphasor need a
good ground to work.
While I haven't seen much of a correlation between Deltas and reduced lightning
damage, (lots of system damage with and without)
I have fo
HI BIll;
I'm still slightly confused:
I think you are saying that the #8 can go straight to the service panel
grounding buss? (as per 690.47(C)6&8)
What about 690.47 (D) that requires an array ground to go to a supplemental
electrode installed "as close as practicable to the array."
For
It seems to me that William's original question of where does the EGC stop, and
the GEC begin, all depends on whether the Enphase inverters bond negative to
ground internally.
Did we ever get an answer from Enphase?
If they don't, then I think by definition in article 100, we would only have an
My own limited field experience in lightning country (New Mexico, Colorado,
Wyoming, Texas, Oklahoma), has definitely proven your point. Grounding and
testing of the grounding system is the first line of attack against lightning.
Also, showing an insurance company (and the customer) ground impeda
grid
measurements.
R. Walters
On Sep 14, 2010, at 8:04 PM, Dave Palumbo wrote:
> What Ray Walters said was the truth. Resistance to ground should be very low.
> How many dollars is that tester you use Ray? We don’t own one. On the wish
Amprobe's lowest range is .025 to .25 ohm. The lowest reading I've seen
was .95 ohm on a commercial building in Hawaii.
Ray
On Sep 15, 2010, at 6:25 AM, Darryl Thayer wrote:
> If you are doing Off Grid is it enough just to drive two ground rods? and
> make a connection bet
HI Allan;
I found the 175s play very well when mixed with the 165s on an MX 60. We've
done it several times.
What's interesting is that the Solarworlds often outperform their nameplate
rating, I've seen the 165s close to the 175 numbers.
Essentially they're all the same module, just flash tests
I agree Nick, that's what the wrenches list is for: to protect our fellow
wrenches and our customers. If Solar CIty is taking the business, they better
be able to take the heat. I'm very concerned that they are not hiring
experienced designers. They're about to give the whole industry a black ey
At one point at the top, he has both hands free, while he messes with the
lanyard. At another point he "ties off" by just hooking the lanyard to the
ladder rung, but its open on the side, allowing the hook to slide off the end.
I'm glad you let us know that was "not an approved climbing method".
I take the generator concern one step further:
We had a "solar dealer" selling Y2K generator specials that included a Male to
Male extension cord!
Just plug that bad boy into any outlet and fire the whole place (and the
utility line) up.
I confiscated one of these cables, and show it to new inspe
My long field experience with Solarworld modules measured in conjunction with
an irradiance meter, shows that they do consistently out perform their STC
ratings.
Of course that's not a "take it to the bank" lab test. I've also seen Sunpower
outperform its STC ratings.
R. Walters
r...@solarray.c
I still haven't found a substitute for the venerable SW series inverters from
Trace/ Xantrex/ Schneider?.
Even after the Outback inverters came out, I still used the SWs for autostart
projects. Otherwise it was just too much hassle.
90% of my generator projects,though, I talked the customer into
was under the
impression that they had to have positive bonded to ground to function
properly. Your proposed "Temporary Ground Lift" circuit would probably be the
best way for Sunpower modules?
Thanks for your always thorough education of us numb nuts in the field,
Ray Walters
>
I can confirm at least one reverse marked battery as well; another reason I
hammer everyone on my projects to confirm polarity with a multimeter, and mark
the wires as John Wiles has advocated:
Red = Positive, Black = negative for ungrounded systems
Red = positive, white = negative for neg ground
Corrugated is really a pain to flash, but the ProPanel type roofing is really
easy to work with. It has large (6 to 8"? wide) sections to put mounting feet
down on.
Only problem is if the rafter you need, ends up falling under a metal ridge.
Snow slides off metal roofs all at once in big clumps,
s, if it was
within the realm of us wrenches.
Thanks,
Ray
On Oct 19, 2010, at 10:00 PM, Bill Brooks wrote:
> Ray,
>
> The reason I mentioned resistively grounded systems is that anything requires
> a ground, like SunPower, could use a resistive ground instead of being
> ung
Hi Jay;
I'd second (3rd, 4th?) everyone else's comments that it probably isn't a good
idea.
I'd add that the diode will eat at least a volt, so that's not good for MPPT,
or balancing.
The one possible way to do this, might be to use a Vanner battery equalizer,
which is designed to split an inco
P Certified Photovoltaic Installer
> EE98J Journeyman Electrician
> Positive Energy, Inc.
> 3201 Calle Marie
> Santa Fe, New Mexico 87507
> 505 424-1112
> www.positiveenergysolar.com
>
> On 10/20/2010 11:58 AM, jay peltz wrote:
>>
>> Hi Ray et all,
>>
&g
Why does the side mounted breakers make the Midnite non compliant?
Apparently I missed Robin's post on that.
Or do I not want to know?
Thanks,
R. Walters
r...@solarray.com
Solar Engineer
> . Midnite enclosures, with the breakers on the sides, are not compliant, as
> Robin has acknowledged, but
I agree with Phil's always excellent posts, except for the quote below.
> On Oct 21, 2010, at 9:29 PM, Phil Undercuffler wrote:
>
>> risk splitting the top chord of the beam. If you split that, I would
>> immediately stop what you're doing and consult with the I-beam manufacturer.
>> Big lia
Hi Nathan;
I agree that too many strings can cause problems, as you mentioned, but I've
seen 2 major problems with single battery strings, too:
1) A single cell failure, or corroded connection takes the entire system out of
commission.
2) Most batteries do not have enough current to meet the s
How is the CD version for 2008? Is it easier to look stuff up (ie indexed
better)?
I've never tried anything but the hard copies.
R. Walters
r...@solarray.com
Solar Engineer
On Oct 25, 2010, at 12:06 PM, Matt Lafferty wrote:
> Hi Drake,
>
> 2011 NEC is available now in Looseleaf (3-Ring bin
I've worked on a couple of commercial projects where birds were trouble. On
one, we would clean the array, and in less than a week, it would have crap all
over it. Definitely dropped output.
An owl decoy seemed to not have much effect.
On another project, they had installed the high frequency sou
HI Allan;
I just recently used some flexible stainless steel line on an old radiator/
boiler system here. It had special fittings, that I was a little dubious of at
first, but it all worked well, and was easy to install.
I believe it was the Easy flex product.
The only problem I encountered, was
The large batteries as everyone else noted are definitely the way to go on off
grid systems.
You are strengthening the weakest link. However, consider 2 parallel strings.
I no longer consider a single string to be optimum, after having a large pump
on a pair of Outback inverters cause low volta
Nick;
How many of the failures are polycrystalline vs. mono?
Both Solarex (then later BP) had failures of their poly stuff, are those the
ones you are referring too?
Photowatt comes to mind
I've had my best luck though with the Made in USA monocrystalline.
R. Walters
r...@solarray.com
Solar
I've seen inverters do just fine under construction of the house. As long as it
isn't being overloaded every day.
As for bad connections, if the main DC connects aren't tight, you can get
enough heat to melt the plastic insulators, and then it can short to the case.
I can send you an ugly picture
C40 charge controllers used to have that problem too; if battery voltage
dropped so low that it didn't think it had a battery to charge, the whole
system just sits there crashed, batteries sulfating, sun shining(customer
stewing)
I'd just charge them on a 12 v automotive charger, 2 at a
I'd just be worried about the rebar blowing the plaster out, when it comes out
the other side.
We welded a drill bit to the end of the rebar.
Once we're through with our rebar/ bit thing, we use diamond grit hole saws to
make a clean hole in the plaster.
I've been eyeing the Lenox carbide hole s
HI Allan;
I converted years ago to a single clip-on leather pouch from Texas hold um.
This one pouch holds my needle nose, 9" line's man pliers, wire stripper/
crimper, 10" channel locks, dike cutter, utility knife, mini screw driver, and
the Klein multi-tip screw driver.
I found walking around
HI All;
I have struggled for years to get the right battery cable; in the old, old days
we used welding cable, which was better than THHN, but not with the AHJs.
Then we used a SAE battery cable with 532 strands that was ideal, but not UL
listed.
Next we used Cobra X flex, but at over 2000 stran
per in
the X-flex.
R. Walters
r...@solarray.com
Solar Engineer
On Nov 29, 2010, at 7:03 PM, Glenn Burt wrote:
> Hi Ray,
>
> I have for my last 2 battery jobs used the Cobra X-Flex in 2/0 size with MTW
> rating.
>
> At the battery end I have found the Thomas & Betts
t;
>
> From: re-wrenches-boun...@lists.re-wrenches.org
> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Glenn Burt
> Sent: Monday, November 29, 2010 6:03 PM
> To: 'RE-wrenches'
> Subject: Re: [RE-wrenches] Battery Cable REvistied
>
> Hi Ray,
&
ulation on motor windings and frames. Sprays are available in
> clear, red or black.”
>
> The local Home Depot carries it here, also some electrical distributors.
>
>
> From: R Ray Walters
> Sent: Tuesday, November 30, 2010 9:26 AM
> To: RE-wrenches
> Subject: Re: [RE-
One AHJ actually got me on this with sealed batteries. I've blown the seal out
overcharging a sealed battery too, so this is a real possibility. The venting
requirements are not near as stringent though as for a flooded cell. Article
480 says we need to prevent the build up of explosive gases, w
I'll agree with you, Dana, although I think setting the batteries in the ground
will help in more of the cases.
Battery optimum temperature is actually lower than the standard test temp of
25C (77F).
When you overlay the graph showing increased cycle life of batteries at lower
temps with the ca
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