First time posting so I hope I’m doing this right.
We have been using a product called RayTray on projects in the 20-100kW range
for a few years now. It’s basically a white plastic (RPVC) extrusion tray with
a cap that builds out quick and does a nice job of protecting wires from
sunlight.
Jeremy Coxon NABCEP
Certified MWBE
SunWind Power
Sent from my iPhone
> On Jul 25, 2020, at 7:23 PM, Jerry Shafer <jerrysgarag...@gmail.com> wrote:
>
>
> Wrenches
> Looking at residential installations l do not see cable trays becoming common
> place in part do to cost and visual appearance.
> Commercial is where trays work for home runs, feeders to big commercial
> combines is common place. But they are not pretty by any stretch. I have used
> aluminum unistrut as trays on smaller arrays using the crosses and T's then
> their covers
> Jerry
>
>
>> On Fri, Jul 24, 2020, 11:00 PM Corey Shalanski <coreso...@gmail.com> wrote:
>> Wrenches,
>>
>> I noticed a couple good threads ("Cable tray" / "PV Wiring methods") about
>> this topic back in 2013, but I haven't seen much discussion since then.
>> Given some of the advances in PV equipment since then (improved ground-fault
>> protection, arc-fault circuit protection, rapid shutdown), I am curious
>> about current attitudes toward using metallic conduit/cable tray on
>> rooftops. I am primarily interested in hearing about flat commercial
>> rooftops but imagine some of the same conventions may apply for residential
>> rooftops.
>>
>> What are you using for long (or short) dc circuit runs on rooftops? Is cable
>> tray still considered safer? Are there situations where conduit may be
>> merited? If so, is RMC favored over EMT?
>>
>> Do best practices change when considering ac circuits (rather than dc)?
>>
>> Back in 2013 Bill Brooks said that PV installers are the "crazy people"
>> installing conduit on rooftops, and he prophesied that using cable tray on
>> roofs would "become common practice soon." Where do we stand now?
>>
>> --
>> Corey Shalanski
>> Jah Light Solar
>> Portland, Jamaica
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