Thanks Dan, that has also been my understanding of all listed
equipment. Certain switches etc will say on them "AC only", or give
different DC ratings. Otherwise the voltage listing is AC/DC.
Ray Walters
Remote Solar
303 505-8760
On 5/10/21 2:55 PM, Dan Fink wrote:
Esteemed Wrenches; I spoke with engineers at both Wago and 3M today
regarding the AC vs. DC ratings of Wago 221 and other wire splicing
products. Both engineers stated that standard UL486C (Splicing Wire
Connectors) applies to */both/* AC and DC voltages unless the product
is specifically listed for /*only */AC or DC.
They both gave the example that the same applies to the actual wire
that is being spliced: Is the THWN-2 wire we use inside DC OCPD panels
specifically UL rated for DC? *No (UL83)*. Is it acceptable for DC?
*Yes,* we use it all the time for DC circuits. How about USE-2 and MC?
Can we use them for both AC and DC? *Yes, *we use them all the time
for both AC and DC. Is it specifically UL rated for DC? *No. It
doesn't need to be.*
Of course any wiring device that *disconnects *any circuit under load
must be rated for either AC, DC or both depending on the application.
But wire splicing connectors are not intended as a disconnecting
device under UL486C.
I hope this clears up any confusion.
Best regards;
Dan Fink
Owner, Buckville Energy Consulting LLC
IREC Certified Instructor for PV and Small Wind Installation
NABCEP Certified PV System Inspector
NABCEP PV Associate
d <mailto:dan.f...@greendustrialtraining.com>anbo...@gmail.com
<mailto:anbo...@gmail.com>
970-672-4342
On Fri, May 7, 2021 at 3:43 PM Jason Szumlanski
<ja...@floridasolardesigngroup.com
<mailto:ja...@floridasolardesigngroup.com>> wrote:
In another thread these connectors were discussed recently. There
was a question regarding the suitability for DC circuits. I don't
think we came up with any answers or consensus on that. I see the
connectors are UL listed to the 486C standard. I can't determine
whether that is applicable to AC and DC circuits. Does anyone know?
I have only used these on AC circuits and they have been very
effective. Now I'm curious whether they can be used on DC circuits
up to 600 volts.
While on the subject, I noticed they are UL 467 listed for
grounding and bonding. That's helpful where you have EGC splices
for conductors up to #10 AWG inside junction boxes.
Jason Szumlanski
Florida Solar Design Group
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