County of Napa (CA)

California Authority Having Jurisdiction Solar permitting requirements

NEC Code Version2023

Fire Code Version2018 Building Code

SolarAPP+ StatusTargeted

Wet Stamps RequiredDigital Electrical

Fire Setback Enforced1

Codes

NEC Code Version: 2023

Fire Code Version: 2018 Building Code

Code List

2025 CALIFORNIA BUILDING CODE

2025 CALIFORNIA ELECTRICAL CODE

2025 CALIFORNIA FIRE CODE

2025 CALIFORNIA PLUMBING CODE

2025 CALIFORNIA MECHANICAL CODE

2025 CALIFORNIA ENERGY CODE

2025 CALIFORNIA RESIDENTIAL CODE

2025 CALIFORNIA ADMINISTRATIVE CODE

ASCE Code Specification: ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status: Targeted

Any SolarAPP+ Restrictions: 1

SolarAPP+ Restrictions: MPU,Derate

How Many Plansets Required: 3

Revision Required: 1

New Planset Required For Module Swap: 1

Stamps

Ee Stamp Required On SLD: Yes

Wet Stamps Required: Digital Electrical

Structural Calculations Required: No

Stamp Location On Plans: Unspecified

Date On Stamps: Expiration Date

Fire setbacks

Fire Setback Enforced: 1

Setback Notes: Standard

Structural & loads

Wind Speed: 110

Wind Notes: Exposure Category C

Snow Load: 0

Reducible Snow Load Allowed: 1

Max Attachment Spacing: 96

Structural Notes: Structural calculations only required if array is more than 24 inches from roof surface to bottom of array (very rare)

Minimum Ground On Roof: #10

Electrical

AC Disconnect Required: Yes

Electrical Load Calcs Required: Derates

Allowed POI: Load Side Taps,PV Breaker,Meter Adapter,Line Side Taps

Panel Schedule Required: Partial Home Backup

Temperature Rating: 90

De Rating Ampacity: 0.96

Battery / ESS

Unique Battery Placards Needed: 0

ESS Notes

This AHJ requires the elevation view.

Verify that ESS is located a minimum of 3' from all doors and windows in accordance with CFC 1207.11.3. or Note spacing/separation distance between ESS units. Ensure that spacing is compliant with CFC 1207.11.2.1 or UL9540A large-scale fire testing

No published information about battery placement. If battery system, include this note on ELD: Producer's storage device(s) will not cause the Host Load to exceed its normal peak demand. Normal peak demand is defined as the highest amount of power required from the Distribution System by Producer's complete facilities without the influence or use of the energy storage device(s).

Separate ESS Disconnect Required: ESS Disconnect

ESS Elevation Detail Required: Yes

Plan set

Plan Set Requirements: The plan set PDF needs a bookmark on each page, including all spec sheet pages. Bookmark Instructions: https://www.countyofnapa.org/DocumentCenter/View/24064/How-to-Add-a-Bookmark?bidId=

Site: All structures on property need to be identified on the site plan

Electrical Diagram: Standard

Custom Placards Required: 1

Non Standard Revision Requirements: Clouding needs to be in red.

Ground mount

Ground Mount Fencing Required: Yes

Ground Mount Notes

SEPTIC SYSTEM NEEDS TO BE TO-SCALE AND HAS TO BE CLEARLY DEPECTICED ON THE PLANS.

Update the building site plan to clearly and accurately show/label the entire location of the existing onsite wastewater treatment system(s) and water system(s) to scale in feet. Include all the following features:

• septic tank(s)

• sump tank (if applicable)

• sewer line(s)

• leach lines/dispersal area

• septic reserve

• water source(s) (wells, springs, public water source connection, etc.)

Be sure to show the staging area for this project relative in feet to the improvements as referenced above.

Please accurately show the location of existing and or proposed electrical conduit lines with a minimum 12” spacing from sewer components and water lines.

* FENCE IS NEEDED FOR ALL GROUND MOUNTS * ADD NOTE TO PLANS FOR GROUND MOUNTS "10' BRUSH FREE ZONE REQUIRED AROUND ARRAY" * All wiring installed underground shall be suitable for wet locations and shall be clearly labeled as such on the conductor insulation. * All underground utility trenching shall be a minimum of 18” below grade, unless through or within a vineyard where a minimum depth of 48” shall be required as per County of Napa ordinance. Depth shall be measured from top of pipe or conduit to grade. * Provide two (2) ground rods spaced a minimum of 6’ apart if proof of a UFER ground cannot provided in the field * Provide all labeling as required by CEC, including a label stating “this service is being fed by multiple energy sources” (list all sources I.E. Service provider, PV system, generator etc.) and show the locations of each including all disconnects. * Unprotected grounding electrode conductors shall be a 6 AWG or larger copper or aluminum and shall be securely fastened to the construction. Grounding electrode conductors smaller than 6 AWG shall be protected ****For acquiring Septic map and plot plans**** and/or ###