City of Aurora (CO)

Colorado Authority Having Jurisdiction Solar permitting requirements

NEC Code Version2023

Fire Code Version2018 Building Code

SolarAPP+ StatusTargeted

Wet Stamps RequiredDigital Structural

Fire Setback Enforced1

Codes

NEC Code Version: 2023

Fire Code Version: 2018 Building Code

Code List

2021 INTERNATIONAL BUILDING CODE

2021 INTERNATIONAL RESIDENTIAL CODE

2021 INTERNATIONAL MECHANICAL CODE

2021 INTERNATIONAL FUEL GAS CODE

2021 INTERNATIONAL FIRE CODE

2021 INTERNATIONAL PLUMBING CODE

2021 INTERNATIONAL EXISTING BUILDING CODE

2021 INTERNATIONAL ENERGY CONSERVATION CODE

2023 NATIONAL ELECTRICAL CODE

ASCE Code Specification: ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status: Targeted

Any SolarAPP+ Restrictions: 1

SolarAPP+ Restrictions: MPU,Derate

How Many Plansets Required: 1

Revision Required: 1

New Planset Required For Module Swap: 1

Stamps

Ee Stamp Required On SLD: No

Wet Stamps Required: Digital Structural

Structural Calculations Required: Yes

Stamp Location On Plans: Unspecified

Date On Stamps: Date Plans are Stamped

Fire setbacks

Fire Setback Enforced: 1

Setback Notes: Standard

Structural & loads

Wind Speed: 120

Wind Notes: Exposure Category B

Snow Load: 40

Snow Load Notes: Ground Snow Load 40 PSF; Roof snow load 30 PSF: Snow loads reductions are not allowed.

Reducible Snow Load Allowed: 0

Max Attachment Spacing: 96

Structural Notes

PE Instructions:

FOR NEW STAMP REQUESTS AND RESTAMPS, The AHJ requires that structural stamps on PE calcs, PE letter, roof plan & roof mounting details page must be dated with the date of signature through the stamp. Please see attached below regarding acceptable date of stamps.

***All stamped documents must carry the same stamp date, even on revision / re-stamps.

"The Engineer’s letter (residential) shall include the following information:

Complete, detailed description of the existing roof framing (structural components of the roof and their physical condition).

Name of person/organization, under the responsible charge of the engineer, who performed the site visit to visually inspect and identify the structural components of the roof and their condition

Refrain from using term "slippery slope" or "slippery surface" in structural letter & calcs. Slippery slope in structural engineer's calculations/letter is not accepted within the City of Aurora.

***Engineering letter must include this statement exactly. "This Engineer Letter certifies the roof is adequate to support the solar PV system."

Minimum Ground On Roof: #6

Electrical

Electrical Load Calcs Required: Derates

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

Panel Schedule Required: Partial Home Backup

Service Ground Requirements: Need to bond neutral to ground at first means of disconnect on a line side tap.

Supply Tap Neutral Ground Bond Required: 1

Temperature Rating: 75

De Rating Ampacity: 0.96

Battery / ESS

Unique Battery Placards Needed: 0

ESS Notes: Standard

Separate ESS Disconnect Required: ESS Disconnect

ESS Elevation Detail Required: No

Plan set

Plan Set Requirements

For all projects please include flashing spec sheet, mounting foot spec sheet, array system bonding & grounding spec sheet and module compatibility sheet.
Plans must be sized for 11x17 with no large borders at the edges outside the template block.
For Unirac projects please include flashing spec sheet, mounting foot spec sheet, array system bonding & grounding spec sheet and module compatibility sheet.
Add SFM railless UL2703 cert for SFM projects to plans.

Cover Page: Please include inverter spec sheet that shows compliance with 2020 NEC.

Attachment Detail: Array section view and framing plan on Mounting Details page must match roof plan.

Electrical Diagram

For Line Side Taps:

Indicate on the 3-line diagram bonding the GEC and the neutral conductor at the main PV disconnect.

Provide the specifications sheets and the UL listing document for the tap connectors to be installed.

Line side tap ground needs to be a min. #6 AWG. Need to bond neutral to ground at first means of disconnect on a line side tap. Do not remove poi to disco grnd or neutral

Specify if interactive, hybrid or stand-alone system.

Plans shall include all grounding on Single-line diagram. Centerfed 120% allowed

Enphase systems must show conductor info from modules to Jbox on roof. Default template info is insufficient.

Custom Placards Required: 0

Ground mount

Ground Mount Fencing Required: No

Ground Mount Notes: Soil Class: Clay

Ground Mount Requires Soil Sample: Soil Study