<div dir="ltr"><div>Hi Marco,</div><div></div><div>It goes back to 690.35(D). Transformerless inverters are usually ungrounded PV systems, so the wire must bein raceways, or it must be PV wire.</div><div></div><div>There are a few exceptions, the SMA CP-US inverters can have a grounded conductor, but you must have a floating AC neutral.</div>
<div></div><div>And the Solarons gets away with it since the GFDI is bonded throught the AC neutral when in operation.</div><div></div><div>Jun 2013 07:09:55 -1000<br>
From: "Marco Mangelsdorf" <<a href="mailto:marco@pvthawaii.com">marco@pvthawaii.com</a>><br>
To: "'RE-wrenches'" <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
Subject: [RE-wrenches] double insulated wire<br>
Message-ID: <007e01ce7422$519df6e0$f4d9e4a0$@com><br>
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<br>
I'm kinda confused. With more transformerless inverters on the market<br>
(e.g., SMA and Power-One), it's not clear to me if double insulated wiring<br>
needs to be used all the way from each series string to their respective<br>
inverter.<br>
<br>
<br>
<br>
We've been installing the P1 3-6 kW TL inverters and there's no apparent<br>
mention of needing to use such conductors, yet I remember needing to do so<br>
when I installed a number of the 8, 9 and 10 kW SMA TL inverters.<br>
<br>
<br>
<br>
Thanks,<br>
<br>
marco<br>
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