Hypalon Cable [RE-wrenches]

[Joel Davidson]

Bill,

Battery and module interconnects are in different environments. Since you
brought it up, USE-2 wire and MC connectors for module interconnects have only
been in use since 1990. So far connector contacts have corroded, wire has pulled
from the connectors, wire has been abraded and water has run down wire and past
watertight connectors into j-boxes requiring weep holes to be drilled in
j-boxes. I prefer THWN in conduit, but the industry is switching to
quick-connects and unprotected wire for module interconnects.

Back to welding cable. I encourage you, John Wiles and other PV experts to
support Drake Chamberlin's proposal for the use of welding cable for battery
interconnects and for cabling to junction boxes, DC250s, etc. If you can not
support the proposal, please list specific reasons for not using welding cable
in this application so that other opinions can be considered.


Bill Brooks wrote:

> Joel,
>
> The suitability of welding cable is based on years of experience with folks
> that have used and it held up okay. That is not the type of testing that
> most jurisdictions accept (however valid it may be). Case in point, I
> visited a large PV system in San Diego several months ago that had been in
> operation for nearly 20 years with exposed THWN wire run between the
> modules. It was a high voltage system and had not ground-faulted yet. From
> this 20-year field test, does this allow me to jump to the conclusion that
> THWN wire is suitable for module interconnects. Absolutely not, unless I can
> show that this wire was tested and listed as sunlight resistant and allowed
> to be installed outside of conduit (neither of which is true in this case).
>
> Bill.
>
> -----Original Message-----
> From: Joel Davidson [mailto:joeldavidson at earthlink.net]
> Sent: Friday, July 19, 2002 9:58 AM
> To: RE-wrenches at topica.com
> Subject: Re: Hypalon Cable [RE-wrenches]
>
> Welding cable is suitable for battery interconnects and for cabling to
> junction
> boxes, DC250s, etc.
>
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