[RE-wrenches] Label Durability

Wed Jul 1 16:45:37 EDT 2020

Aloha Corey,
Mahalo for doing this and sharing. I would love to see and inspect the
systems I installed in the Bay Area circa 2007-2010. It’s really awesome to
see some real world testing.
When Borrego Solar had a residential unit we used to physically stamp our
placards but they were black with a chrome finish( see attached photo). I
bet those are faring well these days. We also used to drill, fasten
(rivet)  and seal these to all appropriate equipment.

Thanks again for sharing.

[image: image.png]

*James B. Rudolph*

*Electrical Contractor C-36080*

*ES Electrician # 10816*

*NABCEP Certified PV Installer # 091209-155*

*808.313.9701*

On Mon, Jun 29, 2020 at 7:11 PM Jesse Dahl <dahlsolar at gmail.com> wrote:

> That kinda seals the deal on Sharpies. I found Pica ink markers to be
> better than sharpies anyway.
>
>
>
> Sent from my iPhone
>
> On Jun 29, 2020, at 7:48 PM, Martin Herzfeld <findsolar at herzfeld.org>
> wrote:
>
> 
>
> A.  Attached are samples of field applied hazard marking (Photos) on the
> topic of durability and handwritten.
>
> B.  2017 NEC 110.21(B)(2) Field-Applied Hazard Markings. Where caution,
> warning, or danger signs or labels are required by this Code, the labels
> shall meet the following requirements:
>
>  -  The label shall be permanently affixed to the equipment or wiring
> method and *shall not be handwritten*
>
>    1.
>
>    -  Exception to (2): Portions of labels or markings that are variable,
>    or that could be *subject to changes, shall be permitted to be
>    handwritten* and shall be legible.
>
>
>    In other words, are the portions of labels subject to changes? :)
>
>
> All the best,
>
> Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified
> Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC
> 10037
> Contract Training Provider (CTP)
> Adjunct Professor, Energy
>
> California Solar & Electrical Contractor License  #00833782  C46, C10,
> D56, D31, C-7
> Solar, Electrical, Trenching, Pole Installation & Maintenance,
> Instrumentation
>
> Contract Solar (PV) Technical Inspector - 3rd Party Inspections
> Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30
> OSHA-Authorized Construction Trainer #32-0105338
> CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG
>
> * Professional Member, International Association of Electrical Inspectors
> #7035507 - Since 2006
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>
> On Sat, Jun 27, 2020, 4:18 PM Ray <ray at solarray.com> wrote:
>
>> Sharpie fades pretty fast in the sun (1 year?).  Paint pen would do
>> better, but can be messy.
>>
>> Ray Walters
>> Remote Solar
>> 303 505-8760
>>
>> On 6/27/20 5:06 PM, Jesse Dahl wrote:
>> > Did you use a sharpie on the box? I wonder how a sharpie or PICA marker
>> would hold up for 10 years.
>> >
>> > It’s an awesome test though. I love it.
>> >
>> > Jesse
>> >
>> > Sent from my iPhone
>> >
>> >> On Jun 27, 2020, at 12:59 PM, Corey Shalanski <coresolar at gmail.com>
>> wrote:
>> >>
>> >> 
>> >> About ten years ago we set up a test wall of sorts at our company
>> headquarters in New Orleans. The purpose was to monitor the
>> durability/degradation of various materials - including warning labels. We
>> tried to attach a variety of label types: plastic trophy plaques, vinyl
>> stickers, labelmaker tape. We also used various adhesives: sticker OEM
>> adhesive, double-sided tape, "Gorilla Glue", PVC cement. It should be noted
>> that the wall faced southeast and was uncovered, so that it received daily
>> full sun and was exposed to all other environmental conditions (rain, etc).
>> >>
>> >> The results today do not look good (attached photo). None of these
>> products would appear to meet the "sufficient durability" requirements of
>> NEC 110.21(B).
>> >>
>> >> I am curious if anyone is aware of any similar (but more formalized)
>> product testing? and can share results?
>> >>
>> >> Has anyone found a warning label product that performs particularly
>> well over time?
>> >>
>> >> --
>> >> Corey Shalanski
>> >> <Durability Test Wall.jpg>
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>> <20200629_173840.jpg>
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