Note that CA adopts UPC not IPC and the last time I checked there was no
exception to allow shorter vents under solar panels in the UPC, so it
differed from IPC allowance.
If this has changed, would be glad to be know about it!
Cheers,
Rebekah
On Fri, May 13, 2022, 10:51 AM Brian Mehalic via RE-w
Please note we updated 2020 NEC 690.31(C)(1) to allow 24" between
securing/supporting points for PV cable, and removed the problematic
reference to 334.30.
The change was made because as you all know there is not always a way to
secure wires within 12" of a box on the back of a PV module. Of cours
Also, it's unlikely in a tiny home, but double-check there are no multiwire
branch circuits. Neutral could be overloaded once L1 and L2 are the same.
There is a required label that states this in Article 710.15(C).
On Tue, Oct 18, 2022, 5:09 PM Vince McClellan via RE-wrenches <
re-wrenches@lists.
Hi Jason,
That's an interesting question, as typically it is stated that temperature
coefficients are linear, however the "linearity" is with respect to the
temperature variable, not power (irradiance) I have always assumed that
tkPmp is fairly linear with respect to power, but now that you mention
Hi Jason, these might help:
When agreeable with the ESS owner and approved by the AHJ, fire suppression
systems and water supply are permitted to be omitted:
●IFC 1207.8 Where approved by the AHJ, the fire control and suppression
systems, the size and separation requirements, and the water supply
IMO always attends the NABCEP conference and they have a nice solar product
line:
https://imopc.com/imo_uk_gbp_view/products/solar/dc-isolators-dc-disconnects/si-series/si-series-enclosed.html
On Sun, Aug 4, 2024, 6:21 AM Daryl DeJoy via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:
> I
Interesting video! I can understand there will be sites and use cases where
vertically mounted bifacial modules are a good solution. I just can't let
it slide without saying that every single module install manual I have seen
over the past 20 years says:
"*do not focus or magnify sunlight with mirr
I agree with Mike, because you can't change the inverter size in PVwatts*
directly, i*t is just a percentage of the array size based on what ratio
you choose. So if you change the ratio you aren't increasing the array
size.
So that 1 kW array in your example values is paired with an 660 watt
inver
I read the wrenches post regularly, as does Brian Mehalic. We have both
been on CMP-4 (responsible for Article 690) for the past three code
cycles. I believe a few other CMP members probably read too. The
International Association of Firefighters ("largest and most influential
labor unions in Nort
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