County of Los Angeles (Antelope Valley) (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: 2

Revision Required: 1

Rough Inspection: Footing inspection

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: 20

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 For Ground mounts consider 1500 PSF soil bearing capacity ### Bus Certs are NOT accepted in this AHJ

Minimum Ground On Roof: #8

Electrical

AC Disconnect Required: Yes

Electrical Load Calcs Required: Derates,Battery

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

Panel Schedule Required: Whole Home Backup

Temperature Rating: 75

De Rating Ampacity: 0.96

Battery / ESS

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)

1/5/24 ESS disconnect required within 6ft of MSP on same wall and not blocked by walls/gates/etc

Add DC disconnects to disconnect schedule (County of LA ESS DB says any AC disconnect that shuts down the battery needs to be on the schedule - for this AHJ include DC as well)

5./14/24 In addition to an exterior non-fused ESS disco for the fire department, provide a 2nd fused disconnect or circuit breaker at the ESS when the ESS conductors pass through a wall, ceiling, or floor. Where circuits from the input or output terminals of energy storage components in an ESS pass through a wall, floor, or ceiling, overcurrent protection shall be provided at the energy storage component end of the circuit. Section 706.31(F)

Separate ESS Disconnect Required: Gateway Disconnect,ESS Disconnect

ESS Elevation Detail Required: Yes - with dimensions

Plan set

Plan Set Requirements

ESS JOBS REQUIRE FIRE APPROVAL. REQUIREMENTS UPLOADED AS PDFs.
A CHECKLIST IS ALSO REQUIRED.
For ballast mount projects use PZSE (contact ) for structural engineering For MPUs, refer to the LA County MPU documents below
If the address is above 2,000', the structural calc packet MUST read 20psf. the plans do not have to specify the snow load.
Do not have to attach @ 48 O.C if the Engineer is good with 72 O.C
Bus Certs are NOT accepted in this AHJ

Title Page:

ALL ELECTRICAL EQUIPMENT SHALL BE LABELED, LISTED, OR CERTIFIED BY A NATIONALLY RECOGNIZED TESTING LABORATORY ACCREDITED BY THE UNITED STATES OCCUPATIONAL SAFETY HEALTH ADMINISTRATION.

For MPUs

When relocating Single Pole Loads more than 6 ft. Add this note: Relocated Loads shall be provided with AFCI protection per Sect. 210.12(D)

Cover Page

EXISTING SYSTEMS:

Show existing system size, new system size and total system size

BATTERY JOBS:

PROVIDE A SCOPE OF WORK on the title page for the ESS (See attached file: ESS Scope of Work).

Cover Page Notes: Battery [All work shall be in compliance with the most current Los Angeles County fire code and its sections. // When ESS is installed inside garage, - Any planned or existing attached garage shall comply with all applicable codes and standards, and with the manufacturer's installation manual(s) to which the equipment has been listed, including requirements pertaining to fire protective features (E.g., gypsum board, doors, and ducts), and to alarm/detector devices when said devices become available. // Project shall comply with the current version of the Los Angeles County Fire Department electrical power source disconnect placarding system]

Site

All Jobs

All buildings on property are to be properly labeled and called out as habitable or non-habitable.

Existing Systems

The calculation for total area on the roof needs to include the new and existing systems
Show the locations of existing PV equipment.

Site Notes

All Jobs [ ALL ELECTRICAL EQUIPMENT SHALL BE LABELED, LISTED, OR CERTIFIED BY A NATIONALLY RECOGNIZED TESTING LABORATORY ACCREDITED BY THE UNITED STATES OCCUPATIONAL SAFETY HEALTH ADMINISTRATION.]

MPU [NEW PANEL BY OTHER UNDER SEPARATE PERMIT NEW SERVICE PANEL TO REPLACE EXISTING AT SAME LOCATION // COLD WATER BOND SHALL BE INSTALLED WITHIN 5' OF SERVICE ENTRANCE. // SUPPLEMENTAL ELECTRODE #4 MIN SHALL BE PROVIDED TO GROUND ROD AT PANEL UPGRADE . SECOND GROUND ROD SEPARATED BY MIN 6'.

Battery [NOTE: BACK UP LOAD CENTER WILL COMPLY WITH 210.12(A) USING AFCI BREAKERS NOTE: BOND GROUNDING SYSTEM IN BOTH BUILDINGS . // NEUTRAL BUS AT SEPARATE BUILDING SHALL BE ISOLATED // THE SUB PANEL OR AC DISCONNECT SWITCH AT THE SEPARATE STRUCTURE SHALL BE SERVICE RATED 225.36 SUITABLE FOR SERVICE EQUIPMENT THE DISCONNECT MEANS SPECIFIED IN SECTION 225.31 SHALL BE SUITABLE FOR USE AS SERVICE EQUIPMENT PER SECTION 225.36 ]

Roof Plan

The two fire pathways must be on two separate planes

Provide the distance for all fire setbacks from array to ridge/hip/valley 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: Specify number of comp shingle layers on PV 1 The attachment detail must show roof type, slope, and number of layers if comp Distance from top of module to roof is to be called out for ballast mount projects use PZSE (contact ) for structural engineering.

Electrical Diagram

FOR ALL PROJECTS

Do not use 90°C ampacities/derate factors. FOR

MPU PROJECTS

(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 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
If solar ready MPU:
Show model number for solar ready service panels
Show the location of new and existing service panels on the site plan to comply with Section 210.12(D).
AFCI protection is required for circuits relocated more than 6 ft. per Sect. 210.12(D).

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

EXISTING SYSTEMS

Identify the conductor and conduit sizes/details used to connect to the existing system

Electrical Diagram Notes: All Jobs [THE PV BREAKER SHALL BE LOCATED AT THE OPPOSITE END OF THE MAIN BREAKER OR INPUT FEEDER // ALL TERMINALS TO BE RATED AT 75°C MINIMUM // All electrical work shall be designed per 2025 Los Angeles County electrical code, 2025 California Electrical Code, and 2023 National Electrical Code. // 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.] MPU [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 // 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) // COLD WATER WITHIN 5 FEET AND AT LEAST ONE SUPPLEMENTAL ELECTRODE ARE REQUIRED // 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 // 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).] Battery [BACK UP LOAD CENTER WILL COMPLY WITH 210.12(A) USING AFCI BREAKERS // BOND GROUNDING SYSTEM IN BOTH BUILDINGS .NEUTRAL BUS AT SEPARATE BUILDING SHALL BE ISOLATED // THE SUB PANEL OR AC DISCONNECT SWITCH AT THE SEPARATE STRUCTURE SHALL BE SERVICE RATED 225.36 SUITABLE FOR SERVICE EQUIPMENT // THE DISCONNECT MEANS SPECIFIED IN SECTION 225.31 SHALL BE SUITABLE FOR USE AS SERVICE EQUIPMENT PER SECTION 225.36] LST [ Supply side connection shall be field evaluated by Underwriters Laboratory for modification to the listed equipment. Building & Safety inspection approval shall not be provided without this completed field evaluation.]

Label Page

BATTERY JOBS:

Yellow placards with red lettering as shown in the ESS Plan guide (page 19, PDF in files below) are required in order to identify disconnects for field inspection.

Custom Placards Required: 1

Placards Notes: BATTERY JOBS: Yellow placards with red lettering as shown in the ESS Plan guide (page 19, PDF in files below) are required in order to identify disconnects for field inspection.

Non Standard Planset Requirements: BOS Elevation

Ground mount

Ground Mount Fencing Required: Mesh/Scrim

Ground Mount Notes

Section 690.31(A) in the Code requires that the conductors be “guarded”. A perimeter fence would certainly meet this requirement. A type of mesh/backing installed to protect the conductors and connectors might also be sufficient to meet this requirement. Just note on the plan that it will be installed on site.
No SnapnRack. IR only
Show ground rod at the array on the ELD
UL2703 listed racking systems recognized by L.A. County for integrated grounding and bonding can be found at . The installation instructions for these systems can be downloaded from this page.
Provide a detail for grounding and bonding. The detail should identify the interconnections of module - module, module - rail, rail - rail; the specific manufacturer and model of the grounding lug (UL2703 listed); dc-dc converters or microinverters (if applicable); the conductor size; and any other information that may be needed. See attached LA County Grounding & Bonding packet for reference. (If optimizers are being used provide a detail showing how to bond them using a listed UL 2703 lay in lug) A detail on how to bond the pipes is also required.
When possible, key the system as one array. Only break into multiple arrays when absolutely necessary.
Depict and dimension septic tank and disposal field or seepage pit locations

Setback Front Yard: 20

Setback Back Yard: 15

Setback Side Yard: 5