HomeMy WebLinkAboutCity of Iowa City PHOTOVOLTAIC WORKSHEETPHOTOVOLTAIC SYSTEMS
1
PHOTOVOLTAIC WORKSHEET
Solar photovoltaic (PV) systems have widely gained acceptance as an alternative energy source,
and installations range from the small array supplying a bus stop luminaire to a large array
that covers acres. Since each installation comes with its own characteristics, this worksheet has
been provided for the installer to complete and submit with the required Electrical Permit
Application. With this information in advance, the inspector can get a good idea of what the
project entails and perhaps warn the installer of an electrical code issue before the installation is
complete. The entire PV system installation must comply with Article 690, 691, and 705 of the
2020 National Electrical Code (NEC).
At time of permit application, the electrical contractor must provide the following
documentation to their electrical inspector:
1. Pages 2 and 3 of this document (completed)
2. Equipment spec/cut sheets for grounding/bonding fittings, modules, inverters, micro
inverters, DC to DC converters, disconnects, panels, lugs (lug kits/tap boxes) and any other
electrical equipment associated with the Photovoltaic installation.
3. A one-line diagram of the PV system including raceways, boxes, electrical equipment,
conductors, service interconnection, and tie to an existing /adding of a “Grounding Electrode
System”.
4. A site plan showing the relative location of the array and the PV equipment on the
property. Also provide location of service and distance from array.
To avoid delays in permit issuance please be sure to check over all of the above required
information and paperwork, making sure it is complete and all-inclusive before you submit for
a permit. Missing information can cause delays in the approval, permit issuance and inspection
process.
Note in reference to Stamped Engineered Drawings: The City of Iowa City reserve the
right to request Engineered Stamped Drawings be submitted and reviewed prior to a requested
inspection.
PHOTOVOLTAIC SYSTEMS
2
NOTICE
Please be sure to consult with the local utility company supplying power to the site
before the installation commences. This will help insure their requirements are met.
PV SYSTEM INFORMATION
Number of Arrays to be installed for this project.
sos Standard String Array Micro-Invertor Array
Roof Mount Ground Mount Combination of both
Is Rapid Shutdown Required for this project per NEC 2017 690.12. Yes No
* Loadside Interconnection: If the interconnection is to be made on the “Loadside” of the
Service Over Current Protection Device (NEC 2020 705.12(B)) Please indicate the Code
Section below used to determine the interconnection that has been installed.
LOADSIDE CONNECTIONS
NEC 705.12(B)(2)(1)(a) Feeders
NEC 705.12(B)(2)(1)(b) “
NEC 705.12(B)(2)(2) Taps
NEC 705.12(B)(2)(3)(a) Busbars
NEC 705.12(B)(2)(3)(b) “
NEC 705.12(B)(2)(3)(c) ”
NEC 705.12(B)(2)(3)(d) ”
NEC 705.12(B)(2)(3)(e) ”
PV SYSTEM OVERVIEW
Maximum System Voltage
Maximum Circuit Current
Number of Inverters
Battery Storage Y or N
Min. PV Overcurrent Device
DC to DC Converters
INTERCONNECTIONS
Lineside Connect 705.12(A)
*Loadside Connect 705.12(B)
Service Voltage Rating
Service Amperage Rating
Service Buss Rating
Service Conductor Size
PHOTOVOLTAIC SYSTEMS
3
CALCULATION SHEET: Please provide the calculations for this project as required by the
2020 NEC articles 690.7, 690.8, and 690.9
The 2020 NEC sets the maximum DC circuit voltage requirement please indicate where the PV
system is located.
Part A: 2020 NEC 690.7 Maximum Voltage. Please indicate the Code Section used and
provide the calculations. *If DC to DC Converters are installed, 690.7(B)(1or2) are to be used to
calculate.
Show calculations here:
Part B: 2020 NEC 690.8 Circuit Sizing & Current. Please indicate the Code Section used and
provide the calculations.
Show calculations here:
Part C: 2020 NEC 690.9 Overcurrent Protection. Please indicate the Code Section used and
provide the calculations.
Show calculations here:
On or in a One or Two-Family Dwelling Project (600V or Less)
On or in all other building types (1000v or Less)
Not Located on or in buildings (1500v or Less)
690.7(A)(1) – Listing and Labeling Calculation
690.7(A)(2) – Crystalline and Multicrystalline Calculation
690.7(A)(3) – PV Systems of 100 KW or Larger Calculation
*690.7(B)(1) – Single DC-to-DC Converter Calculation
*690.7(B)(2) – 2 or More Series Connected DC-to-DC Converters
690.8(A)(1) – Photovoltaic Source *DC to DC Converters ONLY
690.8(A)(2) – Photovoltaic Output *690.8(A)(5) – DC to DC Converter
Source
690.8(A)(3) – Inverter Output *690.8(A)(6) – DC to DC Converter
Output
690.8(A)(4) – Stand-Alone Inverter Input
2020 NEC 690.9(B) Overcurrent Device Ratings
2020 NEC 690.9(C) Photovoltaic Source and Output Circuits
2020 NEC 690.9(D) Power Transformers
PHOTOVOLTAIC SYSTEMS
4
FINAL PV SUBMITTAL CHECKLIST
Please use the following checklist provided to verify that all information required by the City of
Iowa City for this Photovoltaic Systems Installation is complete and submitted. Project will not
be approved, and permit(s) will not be issue therefor inspections will not be scheduled or
perform until all of the required documentation submitted and approved. These drawings are
inspected to verify that the installation appears to meet the minimum standards of the National
Electrical Code adopted by the City of Iowa City.
Incomplete submitted documentation can lead to delays for the project so please review your
documents carefully before submitting.
Verify that all the following information is contained in the information you submit for a
permit.
1. _________ Type of Installation. (Roof or Ground Mount)
2. ______ Rapid Shutdown Required.
3. ______ “PV System” Page #2 is filled out completely and accurately.
4. ______ “PV Calculations” Page #3 is filled out completely and accurately.
5. ______All specification sheets for PV/Electrical Equipment to be installed are included.
6. ______An accurate One-line Diagram as described in item #3 on page #1.
7. ______An accurate Site Plan as described in item #4 on page #1.
8. ______Verify requirements for “Point of Connection”. (705.12 (A or B)
9. ______Verify requirements for the Grounding Electrode System. (690.47)
10. ______ Verify the accuracy of all calculations.
PV and Electrical Contractors Reminder:
PV Installers are allowed to:
A PV installer is allowed to construct the support system, mount the modules, inverters or
optimizers, and connect the factory provided module wiring harness (plug and play only).
Responsible Electrical Contractor:
The remainder of the installation such as panelboards, raceways, boxes, fittings, breakers, and
building wire shall be sized and installed by a licensed electrical contractor, who shall obtain
the appropriate permit(s) along with corresponding inspections prior to the commencement of
work.