[RE-wrenches] Enphase System Labeling

[R Ray Walters]

I only use this signage, when its true. 
Gridtie inverters interrupt output in milliseconds, so I don't use it on AC.
My understanding is that it does apply to array disconnects, as the inverter capacitors could still have a charge, that would render the "live on both sides" idea true on DC.
I also see this as appropriate signage in some battery based situations.
Personally, I see a serious problem with too much signage: people won't read any of it, if there's too much.

R. Walters
ray at solarray.com
Solar Engineer




On May 17, 2010, at 2:47 PM, Dave Click wrote:

> Quick poll- how many inspectors/utilities out there require the "live on both sides" label for AC Disconnects, even after you explain to them this only applies to DC disconnects? Even though it's inaccurate, I feel that it at least gives unqualified personnel pause before they open up a switch to something they don't understand.
> 
> DKC
> 
> Dana wrote:
>> This was our last batch
>> 
>> *Labeling For Grid-tie Solar Electric System*
>> 
>> *Great Solar Works, Inc., 970-626-5253*
>> 
>> * *
>> 
>> * KNOPP SIGNS ***
>> 
>> * *
>> 
>> *Qty – 2, Color red*
>> 
>> * *
>> 
>> *INTERACTIVE SYSTEM POINT OF INTERCONNECTION*
>> 
>> *Enphase Micro-Inverters [1] per module [17] Total*
>> 
>> * *
>> 
>> *PHOTOVOLTAIC SYSTEM SOURCE*
>> 
>> * *
>> 
>> * PV System Total Watts 3.910 KW*
>> 
>> * Maximum AC Output Operating Current 13.6 Amps*
>> 
>> * AC Operating Voltage 240 Volts *
>> 
>> * *
>> 
>> *For information and service contact: *
>> 
>> *Great Solar Works, Inc., 970-626-5253*
>> 
>> * *
>> 
>> *Qty – 1, Color red*
>> 
>> * *
>> 
>> *PHOTOVOLTAIC SYSTEM SOURCE*
>> 
>> * *
>> 
>> * PV System Total Watts 3.910 KW*
>> 
>> * Maximum AC Output Operating Current 13.6 Amps*
>> 
>> * AC Operating Voltage 240 Volts *
>> 
>> * *
>> 
>> *For information and service contact: *
>> 
>> *Great Solar Works, Inc., 970-626-5253*
>> 
>> * *
>> 
>> *Qty – 1, Color red*
>> 
>> * *
>> 
>> *PHOTOVOLTAIC AC SYSTEM UTILITY DISCONNECT*
>> 
>> *WARNING - ELECTRIC SHOCK HAZARD - DONOT TOUCH TERMINALS.*
>> 
>> *TERMINALS ON BOTH THE LINE AND LOAD SIDES MAY BE ENERGIZED*
>> 
>> *IN THE OPEN POSITION. IF A GROUND FAULT IS INDICATED THE NORMALLY
>> GROUNDED CONDUCTORS MAY BE ENERGIZED AND UNGROUNDED*
>> 
>> * *
>> 
>> *For information and service contact: *
>> 
>> *Great Solar Works, Inc., 970-626-5253*
>> 
>> * *
>> 
>> *Qty -1, Color Yellow*
>> 
>> * *
>> 
>> *PHOTOVOLTAIC SYSTEM CONNECTED*
>> 
>> *THE AC PV DISCONNECT IS LOCATED *
>> 
>> *Next to Meter on South Wall *
>> 
>> *For information and service contact: *
>> 
>> *Great Solar Works, Inc., 970-626-5253*
>> 
>> * *
>> 
>> Thanks, Dana Orzel
>> 
>> Great Solar Works, Inc
>> 
>> E - dana at solarwork.com
>> 
>> V - 970.626.5253
>> 
>> F - 970.626.4140
>> 
>> C - 970.209.4076
>> 
>> web - www.solarwork.com
>> 
>> Responsible Technologies for Responsible People since 1988"
>> 
>> 
>> 
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