County of Los Angeles (Southwest) (CA)

California Authority Having Jurisdiction Solar permitting requirements

NEC Code Version2023

Fire Code Version2018 Building Code

Wet Stamps RequiredNone

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

How Many Plansets Required: 3

Revision Required: 0

New Planset Required For Module Swap: 0

Stamps

Ee Stamp Required On SLD: No

Wet Stamps Required: None

Structural Calculations Required: Yes

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 B

Snow Load: 999

Snow Load Notes: * Elevations between 2000 and 3500 ft. require 20 psf snow load to be accounted for. * Elevations between 3500 and 5000 ft. require 40 psf snow load to be accounted for. * Elevations greater than 5000 ft. require 80 psf snow load to be accounted for. BCM1608 A1

Reducible Snow Load Allowed: 1

Max Attachment Spacing: 96

Structural Notes: SE digital stamps on corresponding pages, PE Letter & Calcs. For ballast mount projects use PZSE (contact ) for structural engineering ### Bus Certs are NOT accepted in this AHJ

Minimum Ground On Roof: #8

Electrical

AC Disconnect Required: Yes

Electrical Load Calcs Required: Derates

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

Panel Schedule Required: Partial Home Backup

Temperature Rating: 75

De Rating Ampacity: 0.96

BOS Restrictions: Standard

Battery / ESS

Unique Battery Placards Needed: 0

ESS Notes

[LACOF]

This AHJ follows County of Los Angeles (ESS Requirements) (CA).

Please follow this link to County of Los Angeles (ESS Requirements) (CA)

ESS disconnect required within 6ft of MSP on same wall and not blocked by walls/gates/etc

Separate ESS Disconnect Required: ESS Disconnect

ESS Elevation Detail Required: Yes - with dimensions

Plan set

Plan Set Requirements: ESS JOBS WILL NOW REQUIRE FIRE APPROVAL. REQUIREMENTS UPLOADED AS PDFs. A CHECKLIST IS ALSO REQUIRED The two fire pathways must be on two separate planes The attachment detail must show roof type, slope, and number of layers if comp For MULTI INVERTER SYSTEMS, specify which string each module is mapped to on plot plan. Refer to the multi inverter example below For MPUs, refer to the LA County MPU documents below For GMAs (A)The final connections between the fused disconnect and the main service panel needs to be further clarified on the plans. The connection to the GMA is via liquid tight flexible conduit with 3#6 wires (Phase, Phase, Neutral). There is no ground wire in this conduit run. These 3 conductors terminate at the GMA sitting in the meter socket. In order to return the ground path to the Main Service Panel's grounding bar, there needs to be a second wiring method specified on the plans. Show the conduit type/size and the ground wire size between the Fused Disconnect and the Main Service Panel. (B)Per the installation requirements of the GMA, specify on the plans 2-3 ft max between the MSP and Fused AC Disconnect. Bus Certs are NOT accepted in this AHJ

Roof Plan: For systems with multiple strings/inverters, the plans shall clearly identify how all modules are mapped to each string and/or inverter input

Attachment Detail: Distance from top of module to roof is to be called out

Electrical Diagram: FOR ALL PROJECTS Add Note: THE PV BREAKER SHALL BE LOCATED AT THE OPPOSITE END OF THE MAIN BREAKER OR INPUT FEEDER Add note "ALL TERMINALS TO BE RATED AT 75°C MINIMUM" Do not use 90°C ampacities/derate factors. Add Note: All electrical work shall be designed per Los Angeles County electrical code, California Electrical Code, and National Electrical Code. Add Note: 110.2 Approval: All electrical equipment shall be labeled, listed, or certified by a Nationally Recognized Testing Laboratory accredited by the United States Occupational Safety Health Administration. If using a lug kit, provide the model number on the TLD and include a spec sheet for it in the plan set. The kit spec sheet must show UL or other NRTL certification. FOR MPU PROJECTS Add Note: GEC SIZE FROM MAIN SERVICE PANEL TO GROUND ROD TO BE #4 AWG. SIZE OF GEC FROM PANEL TO METAL WATER PIPE TO BE #4 AWG Add note: THE CONNECTION TO THE INTERIOR METAL WATER PIPING SHALL BE MADE WITHIN 5 FT FROM THE POINT OF ENTRANCE. PER SECTION 250.68(C)(1) Add note: COLD WATER WITHIN 5 FEET AND AT LEAST ONE SUPPLEMENTAL ELECTRODE ARE REQUIRED (2 ground rods at least 6' apart is 1 supplemental electrode) If ground rods, comply with the following: 250.53(A)(2) & (3) Resistance of Electrodes: For the ground rod specified on the single line diagram, indicate that there shall be two ground rods separated by six or more feet Add Note: GEC SIZE IS #4 AWG 1 GROUND ROD TO BE INSTALLED WITHING 5' OF COLD WATER MAIN ENTERING THE HOME, CONNECTED VIA UL LISTED BONDING CLAMP Identify if the main panel is fed via an overhead drop or underground feed. If overhead, provide the size of the service entrance conductors AND ground size (GEC) Identify GEC size to Table 250.66 Add Note: If proposed new main panel is located more than 6 feet from the existing main panel, combination-type AFCI breakers shall be used as a method of protection for all 15A/1P and 20A/1P (120V) loads per 210.12(D). If solar ready MPU: Show model number for solar ready service panels FOR HOT BUS PROJECTS If MSP is a hot bus and has 6 or less breakers, provide a panel schedule identifying all the breakers FOR GMA PROJECTS The wire from the inverter to the AC disconnect must also be sized to #6 Per SCE requirements, specify the distance from the GMA to the fused disconnect as 2-3' maximum Indicate that equipment grounding electrode conductor (EGC) shall be in separate conduit. The EGC is not installed in the liquid-tight flexible conduit from the AC disconnect to the GMA GMA requires GEC to be ran in its own conduit to MSP FOR BATTERY PROJECTS: Add Note: BACK UP LOAD CENTER WILL COMPLY WITH 210.12(A) USING AFCI BREAKERS Add Note: BOND GROUNDING SYSTEM IN BOTH BUILDINGS .NEUTRAL BUS AT SEPARATE BUILDING SHALL BE ISOLATED Add Note: THE SUB PANEL OR AC DISCONNECT SWITCH AT THE SEPARATE STRUCTURE SHALL BE SERVICE RATED 225.36 SUITABLE FOR SERVICE EQUIPMENT Add Note: THE DISCONNECT MEANS SPECIFIED IN SECTION 225.31 SHALL BE SUITABLE FOR USE AS SERVICE EQUIPMENT PER SECTION 225.36

Custom Placards Required: 1

Non Standard Planset Requirements: Single Line Diagram

Ground mount

Ground Mount Fencing Required: Mesh/Scrim