shortcircuit2
Senior Member
- Location
- South of Bawstin
Are power distribution blocks required to have an insulated cover in PV Combiners for solar?
This field installed power distribution block for 120/240 volts AC supplying micro-inverter circuits inside this PV combiner needs an insulated cover though...right SolarPro?
The connection is for 16 M-250's split into 2 branches of 8 to compensate for voltage rise.
ETL lists similar variations of this equipment as PV Combiners in this listing report...(page 11 in 7.0)
http://www.rstcenterprises.com/webfiles/fnitools/documents/listing_constructional_data_report.pdf
The product covered by this report is a DC combiner box for use with a up to four photovoltaic
array inputs, and an output of a single DC source.
I found 314.28(E)(4) which prohibits un-insulated exposed live parts in junction boxes. But, if this is a DC PV combiner, it may not be acceptable to use it for connection of AC micro-inverter trunk cables. I don't see any harm in using the combiner this way except the exposed live parts.
I found 314.28(E)(4) which prohibits un-insulated exposed live parts in junction boxes. But, if this is a DC PV combiner, it may not be acceptable to use it for connection of AC micro-inverter trunk cables. I don't see any harm in using the combiner this way except the exposed live parts.
Thanks for the PDB link SolarPro!