[RE-wrenches] grounding the Enphase inverter

[Jason Szumlanski]

To bring the discussion back around to Enphase, at least in the case of
the D380, there is a green wire in the AC Interconnect. This is
irreversibly crimped to a GEC in the rooftop J-Box.  The same question
applies: why a GEC to each microinverter case, and/or why require an
inverter->rail WEEB at all?

 

Jason Szumlanski

Fafco Solar

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of William
Miller
Sent: Friday, March 04, 2011 12:58 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] grounding the Enphase inverter

 

Bill:

Other than  complying just because this is a rule that has to be
followed, is there any logical foundation to the requirement to provide
a #8 ground to a circuit with OC protection at 20 amps?

If there is a valid safety reason, then let's all get behind it and
become adept at providing this GEC.

If the rule makes no sense, let's advocate that it be changed.

What is the reason for providing this GEC to an inverter?

Thanks in advance.

William Miller




At 09:51 AM 3/4/2011, you wrote:



System grounding requirements.

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Mark
Frye
Sent: Friday, March 04, 2011 7:51 AM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] grounding the Enphase inverter

The interesting thing to me is the underlying assumption in the Code
that a
GEC is requried for grid-tied inverters at all. Why isn't EG sufficient
for
function and safety. 

Which of the following common electrical equipment has the same
requirement:

UPS
Motors with regenerative energy disipators
DC power supplies
Standby generators

??
 
Mark Frye

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