BILL NO. 0430 ORDINANCE NO. 12-xx
AN ORDINANCE AMENDING THE MUNICIPAL CODE OF THE CITY OF CLARKSON VALLEY, MISSOURI, REGARDING SOLAR ENERGY SYSTEMS IN TITLE V: BUILDING CODES AND REGULATIONS, BY AMENDING ARTICLE I. BUILDING CODE, SECTION 500.020 CHAPTER 23 OF THE 2009 INTERNATIONAL RESIDENTIAL CODE OF ONE-FAMILY DWELLINGS BY ADOPTING A NEW SECTION M2300 SOLAR ENERGY SYSTEMS.
BE IT ORDAINED BY THE BOARD OF ALDERMEN OF THE CITY OF CLARKSON VALLEY, ST. LOUIS COUNTY, MISSOURI, AS FOLLOWS:
SECTION 1: The Municipal Code, City of Clarkson Valley, Missouri, is hereby amended in Title V: Building Codes and Regulations, by amending the current Article I. Building Code, Section 500.020 Amendments in Chapter 23 of the 2009 International Building Code.
SECTION 2: A new Section M2300 shall be adopted which will read as follows:
ARTICLE I. BUILDING CODE
SECTION 500.020: AMENDMENTS
2009 INTERNATIONAL RESIDENTIAL CODE FOR ONE-FAMILY DWELLINGS
CHAPTER 23 SOLAR SYSTEMS
SOLAR ENERGY SYSTEMS
Building Integrated Solar Energy System: A solar energy system that is designed and installed as a building component that is part of the exterior envelope of the building.
Building Mounted Solar Energy Systems: A solar energy system that is affixed to the principal or accessory building on the property.
Ground Mounted Solar Energy System: A solar energy system that is affixed to the ground.
Ridge: the horizontal line in which the tops of the rafters of a roof meet.
Valley: a depression or angle formed by the meeting of two inclined sides of a roof.
B. Residential Building Integrated Solar Energy systems:
1. Building Integrated Solar Energy Systems shall be a part of the building envelope and shall be an integral part of the building surface and not stand off from the surface of the building.
2. This system shall architecturally blend with the structure in color and texture.
3. Mounting hardware and fastening shall not be visible from the exterior.
4. All exterior flashing, mounting rails, wiring, plumbing and/or conduit shall be properly painted of a color to match the existing adjacent building components.
C. Residential Building Mounted Solar Energy Systems:
1. Building Mounted Solar Energy Systems may be installed only on the roof of the primary structure or accessory building.
2. Roof Mounted Solar Energy Systems shall be parallel to the plane of the roof and shall not extend more than six inches above the roof surface.
3. A roof mounted system shall terminate at least three feet (3’) from the edge or ridge of the roof and one and one half feet (18”) from any valley.
4. Roof mounted systems installed on a flat roof shall be screened from view by a parapet or other architecture feature that is compatible to the existing architecture.
5. All exterior flashing, mounting rails, wiring, plumbing and/or conduit shall be properly painted of a color to match the existing adjacent building components.
6. Location of Building Mounted Solar Energy Systems.
a. Detailed plans to be submitted in accordance with the provisions of Section 405.120: Special Use Regulations.
7. Location of Building Mounted Solar Energy Systems on Accessory Buildings may be located on any roof.
a. Procedure as defined in Sub-paragraph
D. Residential Ground Mounted Solar Energy Systems are permitted as specified with Paragraph C, Sub-paragraph 6.a.
E. Non-Residential Solar Systems:
1. Building Integrated Solar Systems shall comply with the same requirements as residential Building Integrated Solar Systems.
2. Ground Mounted Solar Systems (same procedure as defined in Paragraph D.)
3. Building Mounted Solar Systems:
a. Building mounted solar systems may be located only on the roof of the primary structure.
b. Roof mounted solar systems shall be screened from view from the property line with material that is compatible with the building material in texture and color.
4. Non-residential solar systems on accessory structures or buildings not permitted.
F. General Requirements:
1. Building permits shall be required for the installation of all solar energy systems.
2. Applications for building permits must contain the following:
a. Solar panel system design shall be performed by companies certified by the North American Board of Certified Energy Practitioners (NABCEP) or by a Licensed Electrical Engineer. All installations shall be performed by or supervised by the designer of the system.
b. Provide calculations and a structural analysis by a Missouri Registered Engineer or Architect verifying adequate supporting members and compliance with the structural requirements of the adopted building code. If structural modifications are required, submit a partial roof-framing plan. Show new and existing supporting rafters, beams and headers; include rafter size, span, and spacing. Identify roof sheathing and roofing materials.
c. Provide a roof plan projected on a site plan. Show the location and dimensions of all solar voltaic equipment and PV arrays.
d. Detail equipment support connections to roof. Provide a detail for flashing and water proofing at system supports.
e. Attach all manufacturer specification sheets, installation instructions and recognized third party testing listings to the plans.
3. Should the solar energy system become nonfunctional the system shall be removed and the structure shall be properly repaired and approved by the Building Commissioner and Zoning Administrator.
4. Solar energy systems shall be maintained free of defects, deterioration and rust.
5. All other ordinances of the City shall be complied with.
6. All solar energy systems shall be installed to avoid concentrated radiation or glare onto neighboring properties or traffic. The energy absorbing component of the system shall be a non-glare material.
7. All frames and supports shall be a minimally reflective material.
8. Provide electrical drawings to show compliance with 2008 National Electrical Code (St Louis County Electrical Division). In addition, see the following requirements:
Location of dc conductors
Conduit, wiring systems, and raceways for photovoltaic circuits shall be located as close as possible to the ridge or hip or valley and from the hip or valley as directly as possible to an outside wall to reduce trip hazards and maximize ventilation opportunities.
Conduit runs between sub arrays and to DC combiner boxes shall use the design that minimize total amount of conduit on the roof by taking the shortest path from the array to the DC combiner box. The DC combiner boxes are to be located such that conduit runs are minimized in the pathways between arrays.
To limit the hazard of cutting live conduit in venting operations, DC wiring shall be run in metallic conduit or raceways when located within enclosed spaces in a building and shall be run, to the maximum extent possible, along the bottom of load-bearing members.
Marking is needed to provide emergency responders with appropriate warning and guidance with respect to isolating the solar electric system. This can facilitate identifying energized electrical lines that connect the solar panels to the inverter, as these should not be cut when venting for smoke removal.
Materials used for marking shall be weather resistant. UL 969 shall be used as a standard for weather rating (UL listing of markings is not required).
Ø Red Background
Ø White Lettering
Ø Minimum 3/8” Letter Height
Ø All capital letters
Ø Arial or similar font, Non-bold
Ø Reflective weather resistant material suitable for the environment (durable adhesive materials must meet this requirement)
b. Remote Disconnect
DC Circuits shall be equipped with a means for remote disconnect located downstream from the photovoltaic array at the point where the circuit enters the structure. Control of the remote disconnect shall be located within five feet of the building’s main electrical panel (or other location approved by the fire department). The remote disconnect shall be listed and meet the requirements of the National Electrical Code.
Signage shall be located immediately next to the remote disconnect control as follows:
Ø Marking Content - CAUTION: SOLAR CIRCUIT DISCONNECT (and any additional requirements of the NEC and local utilities having jurisdiction)
c. Main Service Disconnect
For residential applications, the marking may be placed within the main service disconnect. If the main service disconnect is operable with the service panel closed, then the marking should be placed on the outside cover.
Ø Marking Content - CAUTION: SOLAR ELECTRIC SYSTEM CONNECTED (and any additional requirements of the NEC and local utilities having jurisdiction)
d. Marking DC Circuit
Marking is required on all interior and exterior DC conduit, raceways, enclosures, cable assemblies, and junction boxes to alert the fire service to avoid cutting them. Marking shall be placed every 10 feet, at turns and above and/or below penetrations, and at all DC combiner and junction boxes.
Ø Marking Content - CAUTION: SOLAR CIRCUIT (and any additional requirements of the NEC and local utilities having jurisdiction)
The inverter is a device used to convert DC electricity from the solar system to AC electricity for use in the building’s electrical system or the grid.
No markings are required for the inverter.
9. Awning solar energy systems on accessory structures or buildings (same procedure as defined in Paragraph C, Sub-paragraph 6.a.)
10. This ordinance is not intended to preclude any property owner from having trees on their property that would or could possibly interfere with any solar energy system.
11. Grid tied systems shall comply with the requirements of the local utility having jurisdiction and be approved by a recognized third party testing agency.
SECTION 3: All Ordinances or parts of Ordinances in conflict with this Ordinance are hereby repealed and held for naught.
SECTION 4: Nothing in this Ordinance shall be construed to affect any suit or proceeding pending in any Court, or any right acquired or liability incurred, or any cause or causes of action acquired or existing under any act or Ordinance hereby amended.
SECTION 5: Except as amended herein, Title V of the Municipal Code, City of Clarkson Valley, Missouri, shall be and will remain in full force and effect.
SECTION 6: This Ordinance shall be in full force and effect from and after its passage and approval as provided by law.
PRESENTED TO A MAJORITY OF THE BOARD OF ALDERMEN this 3rd day of January 2012.
City of Clarkson Valley