In Texas, for the Oncor Energy TDSP (transmission & distribution service
provider) interconnection agreement, an outside disconnect* is required.
If a PV installation is submitted to Oncor for a rebate, they also
require the inclusion of PV REC (renewable energy credit) meter, but do
not require it to be located outdoors, or in close proximity to their
own revenue meter. The meter must be one listed on the CEC approved list.
/* Oncor's interconnection requirements specify a manual disconnect
device. The disconnect must have a visual break that is appropriate
to the voltage level, be accessible to utility personnel, and
capable of being locked in the open position. Oncor requests that
this visible AC disconnect be located on an exterior wall and within
ten feet of the Oncor meter. If your visible AC disconnect is more
than ten feet from the Oncor meter, then Oncor will request a site
directory placard be installed on customer equipment beside the
Oncor meter or where there is only an Oncor meter then on the Oncor
meter base indicating the location of the visible AC disconnect./
Oncor does not require a disconnect on both sides of the PV REC meter,
but your inspecting AHJ might.
Regards,
Gary Willett, PE
On 1/24/2012 08:52, mac Lewis wrote:
Here in Xcel territory in Colorado, we are required to cold-sequence
the solar production meter. These disconnects have to be utility
accessible and adjacent to the production meter itself. I believe
this is only a utility requirement, not a code requirement. This
seems to be unneeded redundancy, because the inverter side will shut
down, once the line side is deenergized.
Mac Lewis
On Tue, Jan 24, 2012 at 7:14 AM, Allen Frishman <amfr...@aeonsolar.com
<mailto:amfr...@aeonsolar.com>> wrote:
Wrencher's,
I am having a good debate with a fellow solar installer regarding
an NEC requirement to isolate a meter between two disconnecting
means adjacent to the meter when grid connecting via a tap. My
thought is that if we have a load center with breakers to combine
multiple inverters on the roof, the PV meter can be located in the
basement between the roof load center and a fused disconnect
adjacent to the tap with no need for a disconnect next to the
meter on the load center side of the meter. Can anyone reference
a section in the code that requires a disconnecting means adjacent
to both sides of the meter? The meter I am referencing simply
records the total kWh's of the solar system as required by the
State incentive program.
All feedback is appreciated.
/Al Frishman/
AeonSolar
/(917) 699-6641 <tel:%28917%29%20699-6641> - cell/
/(888) 460-2867 <tel:%28888%29%20460-2867>/
/www.aeonsolar.com <http://www.aeonsolar.com/>/
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