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<font size=3>Eirka:<br><br>
Although the Imp is your normal operating condition, you need to design
wire size for an abnormal occurrence (short circuit or other
fault). You do not want the wire to burst in to flame after an
unplanned short circuit, do you? Remember, you may have combiner
fuses, but you have no overcurrent protection to open circuits when a
fault occurs in a PV feeder. See
<a href="http://millersolar.com/practices/Safety/safety_data.html" eudora="autourl">http://millersolar.com/practices/Safety/safety_data.html</a>
, click on Target PV fire.<br><br>
Correct wire sizing is not a waste of money. Loosing output power due to wire heating is a waste of money. Burning down the house is a waste of money.<br><br>
William Miller<br><br>
<br><br>
At 06:27 AM 4/2/2010, you wrote:<br>
</font><blockquote type=cite class=cite cite><font face="Century Gothic, Avant Garde" size=2>To my understanding the 156% on PV source and output circuits is related to the ability of PV to deliver more than rated and be continuous.<br>
Therefore, the wire has to be able to carry this current, so now the temperature and fill corrections are applied to find the wire capable of the 156%.<br>
<br>
I am in a debate where the question is why correct for temp and fill on 156% of ISC and spend all that extra money when the normal operating is at Imp. Or why correct the 156% but why not correct the Isc or Imp.<br>
<br>
I am going to stick to the fact that the circuit has to carry the 156% under all conditions<br>
Thoughts? <br>
<br>
Erika</font></blockquote></body>
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