Bonding of electrical equipment [RE-wrenches]

[Joel Davidson]

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Maybe I expressed myself wrong. More inspectors in southern California are 
requiring bonding bushings because they like to see everything grounded a 
lot.

----- Original Message ----- 
From: "Mark Frye" <markf at berkeleysolar.com>
To: <RE-wrenches at topica.com>
Sent: Monday, November 12, 2007 4:10 PM
Subject: RE: Bonding of electrical equipment [RE-wrenches]


>
> What exacly is it they are learning that makes them believe the PV
> systems should be treated as sevices or generators?
>
> Let see, not kinectic energy stored in a spinning stator (yes perhaps
> some large bqatter banks, but those are on the other side of some
> relatively weak transistor inside an inverter), no unlimited (almost)
> current source from a grid.  What is there really?
>
>
>
>
> Joel Davidson wrote:
>>
>> Keith,
>> More inspectors in southern California are requiring bonding bushings as
>>
>> they learn more about PV systems.
>>
>> ----- Original Message ----- 
>> From: "Keith Cronin" <kcronin at islandenergy.net>
>> To: <RE-wrenches at topica.com>
>> Sent: Monday, November 12, 2007 3:25 PM
>> Subject: Bonding of electrical equipment [RE-wrenches]
>>
>>
>> >
>> >
>> > Hi gents
>> >
>> >
>> >
>> > A topic came up today that I wanted to run by the team, electrically
>> > speaking- NEC. An electrical inspector had a viewpoint that all conduit
>> > runs
>> > from a main distribution system to our equipment- i.e.- disconnects and
>> > any
>> > inverters or junction boxes needed to have bonding bushings as opposed
>> > to
>> > standard locknuts with plastic bushings. These systems are grounded 
>> > with
>> >
>> > the
>> > appropriate grounding wiring sized per the NEC for the feeders. I have
>> > not
>> > seen this requirement before and wanted to see what you all have
>> > experienced
>> > in this environment.
>> >
>> >
>> >
>> > One perspective was that if the enclosure has concentric knockouts, 
>> > like
>> > a
>> > junction box or distribution panel, then yes, they would be required 
>> > and
>> >
>> > if
>> > it is over 300 volts, then they would be required.
>> >
>> >
>> >
>> > Looking forward to some feedback.
>> >
>> >
>> >
>> > Thanks
>> >
>> >
>> >
>> > Keith
>> >
>> >
>> >
>> >
>> > [Non-text portions of this message have been removed]
>> >
>> >
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>>
>
>
>
> Berkeley Solar Electric Systems
>
>
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> To send a message: RE-wrenches at topica.com
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> Archive of previous messages: 
> http://lists.topica.com/lists/RE-wrenches/read
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