Permit Review Detail
Review Status: Requires Resubmit
Review Details: RESIDENTIAL SOLAR v.1
Permit Number - TC-RES-0424-02398
Review Name: RESIDENTIAL SOLAR v.1
Review Status: Requires Resubmit
| Review Date | Reviewer's Name | Type of Review | Description | Status | Comments |
|---|---|---|---|---|---|
| 05/20/2024 | Site Engineering | NOT REQUIRED | |||
| 05/20/2024 | Bldg Permits - Post Review Express | PENDING ASSIGNMENT | |||
| 05/06/2024 | Light Residential Building Review (OIP) | REQUIRES RESUBMIT | Permit Review TC-RES-0424-02398 (3326 E PATRICIA ST TUCSON, AZ 85716) 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). https://www.pima.gov/1069/Solar-Wind-Systems Structural and Fire Pathways Review: 1. Provide complete roof layout plan that shows placement of each panel, existing obstructions and all fire access and pathways as provided by R324.6. 2. Provide a roof layout plan showing the location of the PV modules, racking direction, and mounting points. 3. Provide complete roof framing information for determining load carrying capacity of each structure supporting a collector group. Show size, spacing and span of all framing members including trusses, joists, rafters and beams, R301.1, R324.4. 4. For wind uplift use 115 mph in 3sec gust, Table R301.2(1). https://www.tucsonaz.gov/files/sharedassets/public/pdsd/documents/building-code/2018_-_irc_amendments.pdf 5. Provide a lag-bolt connection up-lift calculation demonstrating the wind load supporting capability, or provide an engineer’s calculation, and sealed design, R301.1, R324.4. An IRC PV roof uplift calculator (XLS) is available on Pima County’s website. https://www.pima.gov/1069/Solar-Wind-Systems 6. Provide roof mounting details, including the lag-bolt’s size and embedment depth into the structure. 7. When applying for a permit to place new equipment on existing code-compliant roofs constructed in the past fifty years, an allowance shall be provided for equipment weighing a maximum of 4 psf and load per attachment point of 40lbs or less, R324.4. Provide plans showing compliance with these prescriptive design requirements, or provide an engineer’s calculation, and sealed design. https://webcms.pima.gov/UserFiles/Servers/Server_6/File/Government/Development%20Services/Building/Equipment%20on%20roofs%20.pdf https://content.civicplus.com/api/assets/3e483fd0-ef6e-4a84-8133-962a287345f7 8. Provide two pathways, on separate roof planes from lowest roof edge and not less than 36” wide. R324.6.1 9. For each roof plane with a photovoltaic array, a pathway not less than 36” wide shall be provided from the roof access point to the horizontal ridge. R324.6.1 10. For photovoltaic arrays occupying not more than 33% of the plan view total roof area, not less than an 18” clear setback is required on both sides of a horizontal ridge. R324.6.2. Electrical Review: 11. 690.12 Rapid Shutdown of PV Systems on Buildings. PV system circuits installed on or in buildings shall include a rapid shutdown function to reduce shock hazard for emergency responders in accordance with 690.12(A) through (D). 12. 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). Show a complete calculation for determining OCPD and conductor requirements. Show each PV branch circuit and the OCPD in the Enphase Combiner panel. 13. Maximum conductor ampacity is determined by applying correction and adjustment factors for temperature of insulation rating of 90C and CCC (Current Carrying Conductor) proximity. Reference NEC 310.15, Table 310.15(B)(2)(a), 310.15(B)(2)(b) and 310.15(B)(3)(a). The adjusted conductor rating may not be less than the calculated Conductor Sizing. 14. The conductor over the roof must be in a conduit and rated for use in a wet location, E3802.8, or rated as sunlight resistant, R3802.3.3. The bottom of the conductor or conduit shall be a minimum of 7/8” above the roof surface, NEC 310.15(B)(3)(c) . 15. PV breaker must be at the opposite end of the bus bar from the main service breaker, 2017 NEC 705.12(B)(2)(3)(b). 16. Provide the exact wording and location for the Photovoltaic system Warning signs and labels as required in NEC 690 and 705.12(B)(2)(3) b-c. a. “Photovoltaic System Disconnect” NEC 690.13(B) b. NEC 690 Part VI Markings – NEC 690.51-58 c. NEC 690.33(E). Additional comments may be forthcoming with updated plans. Contact Jeremy Hamblin with any questions: Jeremy.hamblin@tucsonaz.gov |
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| 04/22/2024 | PDSD Application Completeness Express | REVIEW COMPLETED |