I've been looking hard to see what manufacturers produce this kinda elusive
#10 THHN/THWN-2 wire.
United Copper Industries (Texas) does. I have a handy spec sheet from them
that I can email anyone who's interested.
marco
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al Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ryan
Mayfield
Sent: Friday, July 23, 2010 3:31 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] #10 THWN-2
Peter,
There was a change in the 2008 NEC (I know - CA is
e-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Peter
Parrish
Sent: Friday, July 23, 2010 11:28 AM
To: al...@positiveenergysolar.com; 'RE-wrenches'
Subject: Re: [RE-wrenches] #10 THWN-2
Just a minor point: the dash-two appendage bri
-258-8885
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allan
Sindelar
Sent: Friday, July 23, 2010 10:04 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] #10 THWN-2
Mick,
-2 means 90 degrees C
Mick,
-2 means 90 degrees C rather than 75. THWN-2 thus means that it is
wet-rated at 90C. That is generally considered Code for arrays,
such as if it is run in NM flex conduit to a traditional module
j-box. The j-box area may be considered to be able to get hot enough
9:52 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] #10 THWN-2
I'm sorry to broadcast my ignorance, but:
Could someone explain to me the significance of the -2 marking? Reply
off-list if you wish to save bandwidth...but other List members may also be
wondering...
Thanks,
Mick Ab
Mick,
THWN-2 is 90°C rated per Table 310.16. This is key for conductors in conduit
on a roof. On a roof in full sun ambient temperatures are such that a 75°C
rated conductor will have a severely diminished allowable ampacity, if any
allowable ampacity.
Jollily,
David
On 7/23/10 11:52 AM, "Mick
-2 indicates that the insulation is rated for "hot & wet"; that is that
it is rated for 90C and wet conditions. See NEC Table 310.13(A).
We also use Encore Wire. The sticker on the spool has THHN in big
print, but then in small print below it says "Type MTW or THHN or
THWN-2". The insulati
I'm sorry to broadcast my ignorance, but:
Could someone explain to me the significance of the -2 marking? Reply
off-list if you wish to save bandwidth...but other List members may also be
wondering...
Thanks,
Mick Abraham, Proprietor
www.abrahamsolar.com
Voice: 970-731-4675
On Fri, Jul 23, 20
I have specified THWN-2 for years, but occasionally will not be able to source
it!
Sent from my iPhone
On Jul 23, 2010, at 11:37 AM, "Peter Parrish"
wrote:
> We went through a similar problem with some beach communities here in SoCal.
> Because of the high humidity (all winter and summer mor
We went through a similar problem with some beach communities here in SoCal.
Because of the high humidity (all winter and summer mornings) they wanted
THWN-2 for all conduit runs (as well as PVC instead of EMT). At first we
were charged a premium for THWN-2 compared to THHN. But then we found a
sou
I found similar to Phil, but all the wire had thwn-2 on the spool label but not
on the wire.
Execpt for pink it did not have thwn-2 on the spool lable.
Darryl
--- On Fri, 7/23/10, Phil Undercuffler wrote:
From: Phil Undercuffler
Subject: Re: [RE-wrenches] #10 THWN-2
To: "RE-wre
Marco,
I found the same situation as what David mentions -- when we were doing a
high profile job that was going to be inspected by a certain someone from
Las Cruces, all the wire available from local suppliers was only physically
marked as THHN / THWN, but when we dug a little deeper and found th
THWN-2 smaller than #8 is hard to find but I hear
http://www.encorewire.com/site_flash/index.html makes it and that
Graybar sells it. When I asked Southwire about it about two years ago, I
got a collective "huh?"
Original Message
Subject: Re: [RE-wrenches] #10 T
Marco,
The #10 THWN wire that your local suppliers carry may be cross-listed as
THWN-2. My understanding is that it is not uncommon for smaller gauge wire
to carry more listings than are printed on its insulation. (If that¹s not
true, we¹ll find out shortly from someone on the list.) If your local
Finding that wire in these here parts is pretty much impossible.
Can any of my CA. brethren/sistren provide me any leads on wholesalers in
either northern or southern CA. that carry #10 THWN-2 wire?
Thanks,
marco
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