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Permit Review Detail

Permit Number: TC-RES-0724-04080
Parcel: 136283210

Review Status: Requires Resubmit

Review Details: RESIDENTIAL SOLAR v.1

Permit Number - TC-RES-0724-04080
Review Name: RESIDENTIAL SOLAR v.1
Review Status: Requires Resubmit
Review Date Reviewer's Name Type of Review Description Status Comments
08/12/2024 Bldg Permits - Post Review Express PENDING ASSIGNMENT
07/26/2024 Light Residential Building Review (OIP) REQUIRES RESUBMIT Permit Review TC-RES-0724-04080 (7570 E APPLE TREE DR TUCSON, AZ 85730)
Plan review for the above referenced structure has been completed. This letter reflects comments to be addressed. Provide updated Plans/calculations and a written response Letter to each of the notated items indicating action taken. Resubmitted plans that do not contain a written response Letter addressing each of the notated items indicating action taken, may be delayed until response letter is received.
Code reference, 2018 International Residential Code (IRC), 2017 National Electrical Code (NEC).


1. The AC current calculations are incorrect. The max output of the Tesla Powerwall 3/inverter is 48A. The design current for conductor sizing and OCPD sizing is 48A*1.25 = 60A.
2. AC Overcurrent Protective Device and Conductor Sizing for PV source Circuits and Module Interconnection Conductors (Imax x 1.25). Reference NEC 690.8(A)(3) and (B)(1) for conductor sizing. Reference NEC 690.9(B). Show a complete calculation for determining OCPD and conductor requirements. (See also 706.21 for ESS OCPD)
3. The 50A PV backfeed breaker is undersized for the max rating of the powerwall/inverter output.

Contact Jeremy Hamblin with any questions: Jeremy.hamblin@tucsonaz.gov
08/12/2024 Site Engineering REQUIRES RESUBMIT This project is within a regulated floodplain and requires a Floodplain Use Permit (FUP.) Please start a new FUP at our permit application web page: https://tdc-online.tucsonaz.gov/#/home

Instructions:
1. Navigate into the current project in the “My Work” tab. Within the permit, navigate to the “Sub-Records” tab and click “Apply” on the Floodplain Use Permit Sub-Record
2. Locations -> Confirm the location is accurate to the project. Click “Next”
3. Type -> Fill in the “Square Feet” and “Valuation” boxes with the project area and a contractor-provided cost estimate (See note above: for new structures, input 0). Click “Next”
4. Contacts -> Confirm contacts and add any additional contacts if applicable. Click “Next”
5. More Info -> This will be filled in by the engineer assigned to your case, Click “Next”
6. Attachments -> Please attach the project plan, supporting documentation for the cost estimate (if applicable), and a drainage/hydrology report (if applicable). Click “Next”
7. Signature -> Read the statement and type your name. Sign your name below (You may Enable Type Signature to have the software sign for you.) Click “Next”
8. Review and Submit -> Review all information to ensure accuracy. Click “Submit”
Contact Chris Arrington at chris.arrington@tucsonaz.gov if you have any questions about the FUP.

NOTE: Documentation of a cost estimate will be required for solar installations. The cost estimate must have a cost breakdown, it must include both the cost of materials and the cost of labor, and it may not be a leasing document.
07/13/2024 PDSD Application Completeness Express REVIEW COMPLETED