Can anyone direct me to the NEC article that stipulates how many inches of
separation must be between cables operating at different voltages?
I have a project with PV combiner box home runs at 1,000 volts DC in the same
trench with 12.47 kV cables. Table 300.5 shows minimum cover requirements for
direct burial cables, but this is the distance beneath grade the cables must
be. Is there anywhere in the code that calls for a minimum separation distance
between cables at different voltages?
Thanks,
Jerry Caldwell
________________________________
From: Marco Mangelsdorf <[email protected]>
To: 'RE-wrenches' <[email protected]>
Sent: Thursday, November 3, 2011 2:27 PM
Subject: [RE-wrenches] under performing Enphase inverters
For the first time, several weeks ago, after 40-50 Enphase
installs, we’ve come across at least two M210s that we putting out
consistently lower outputs than their immediate neighbors.
We replaced the two mods first, which made no
difference. Then, in consultation with Enphase, replaced the M210s.
After replacing them, the power output was as it should be.
Now I’ve got another suspect system with several
underperforming mods out of (36).
Has anyone else had this experience?
Thanks,
marco
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