[RE-wrenches] DC Discos for Enphase

[Dave Click]

In John's white paper on wiring Enphases:
http://www.nmsu.edu/~tdi/Photovoltaics/Codes-Stds/WIRING%20ENPHASE%20MICROINVERTERS-11.pdf

he recommends covering the module first anyway so the load-break 
disconnect isn't really an issue. Since you're at the module anyway to 
disconnect that module from the inverter, this usually isn't too hard. 
In the same article he mentions that CSA approved the dc input 
connectors at the microinverter as load-break rated disconnects. I 
believe that Enphase has stated all of this as well but this is the only 
link I know of (I'm sure they have something more up to date):
http://www.enphaseenergy.com/downloads/NEC_EnphaseCheatSheet.pdf

DKC

-------- Original Message --------
Subject: [RE-wrenches] DC Discos for Enphase
From: SOLARPRO at aol.com
To: re-wrenches at lists.re-wrenches.org
Date: 2010/9/14 13:18

> Howdy Wrenches:
> I don't try to stir things up, but I was just wondering last night as I
> fell asleep reading the latest issue of HomePower magazine (# 139), if
> anybody else caught a chill when they read this in the Code Corner
> (highlighted in a box):
> "Both microinverters and microinverters attached to PV
> modules in the field or in the factory that have any exposed
> DC single conductor cables are required to meet all of the
> NEC’s DC wiring requirements. These may include Section
> 690.5 ground-fault detector requirements, DC and AC
> disconnect requirements (potentially handled by connectors
> listed as disconnects), and inverter DC grounding-electrode
> requirements."
> - John Wiles
> Which begs the question: Are <any> module connectors currently listed as
> disconnects?
> As well as: If DC voltages for each disconnect are less than 48 V, would
> a simple switch suffice, should the poor hapless installer run into an
> AHJ with OCD?
> Patrick A. Redgate
> */AMECO Solar, Inc.
> Serving Solar California
> Since 1974
> 7623 Somerset, Blvd.
> Paramount, CA 90723
> 562-633-4400
> /*//www.solarexpert.com <http://www.solarexpert.com/>_
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>
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