[RE-wrenches] "PV wire"
jay peltz
jay at asis.com
Thu Oct 23 20:09:49 PDT 2014
HI Marco
I think there has been a lot of bad/old information about PV vs double insulated wire.
However now it only listed as PV wire.
690.35 D (3)
jay
peltz power
On Oct 23, 2014, at 2:29 PM, Marco Mangelsdorf wrote:
> Yet again this “PV wire” thing rears its head.
>
> For our PV systems using transformerless (TL) inverters, our standard practice has been to use double-insulated conductors for all DC circuits coming into the TL inverter(s), which we believe represents the best practice.
>
> However, there doesn’t appear to be any requirement stated in the code that states the need to use double-insulated conductors for DC circuits and TL inverters.
>
> So I’m thinking, why pay the extra expense for the double-insulated wire when single-insulated wire may suffice.
>
> Anyone know of anything written somewhere that requires the use of double-insulated conductors in TL DC circuits?
>
> Thanks,
> marco
>
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