[RE-wrenches] Full sized neutral - 240 V inverter

[Drake]

Hello Wrenches,

Power One tech support said that full sized neutrals had to be run to 
a pair of 240 V, PVI 3.6 inverters.  We have a 180 foot underground 
run to the service panel.

Why do we need to run a full sized neutral all the way back to the 
panel?  The wiring to the panel is oversized for voltage drop.  The 
code allows for reduction of neutral size where neutral imbalance is 
less than the current of a phase, which is usually the case.

Why does a neutral need to be installed that is the size of the phase 
wiring where the imbalance should be negligible? Or is there a lot of 
neutral current for some reason?  Am I missing something?

Thanks

Drake


Drake Chamberlin
Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV Installer
740-448-7328
<http://athens-electric.com/>http://athens-electric.com/
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