High for low-voltage, plug-and-play systems; Moderate for low-voltage systems requiring new wiring; Low for line-voltage (120V) systems, which typically require an Illinois-licensed electrician.
Installation primarily involves low-voltage electrical components and minimal structural impact. Line-voltage systems require more stringent electrical compliance. Permitting and inspections are key elements of complexity.
Project Guidelines & Rules
Permitting & General Project Requirements
3 Rules
Permit Requirements
Consult your local building department for specific electrical permit requirements prior to commencing work. All electrical work, especially line-voltage installations (120V), typically requires a permit and inspection by the Authority Having Jurisdiction (AHJ).
Licensed Contractors
All line-voltage electrical installations (120V and above) shall be performed by an Illinois-licensed electrician. While low-voltage installations (typically 24V or less) may not require a licensed electrician, permitting and inspection rules still apply for new wiring runs.
Code Compliance
All motorized window shading installations shall comply with the 2024 International Residential Code (IRC), the 2023 National Electrical Code (NEC), and all locally adopted amendments by DuPage County and your local municipality.
Electrical Wiring & Components (2023 NEC)
8 Rules
Branch Circuit Sizing & Protection
Individual branch circuits for motors shall be sized per NEC 430.22, considering continuous duty operation. Where multiple motors are on a single circuit, apply NEC 430.53. All circuits shall be protected against overcurrent in accordance with NEC 240.
Wiring Methods & Conductors
Conductors shall be protected by approved wiring methods such as Type NM-B cable (NEC 334), AC cable (NEC 320), MC cable (NEC 330), or in raceways as appropriate for the location and voltage per NEC Chapters 3 and 4. All conductors shall be suitable for their intended use and environment.
Low-Voltage Wiring (Class 2 and Class 3 Circuits)
Motorized shading systems operating at 50 volts or less (Class 2 or Class 3 circuits) shall comply with NEC 725, particularly articles 725.130 through 725.154 for installation requirements, separation from power circuits, and cable markings. Power-limited circuit cables shall not be placed in the same raceway or enclosure with electric light or power conductors unless specifically permitted.
Disconnecting Means
A readily accessible means of disconnecting the motor(s) from its supply circuit shall be provided, within sight of the motor and controller location, or lockable in the open position per NEC 430.102 and 430.108.
Accessibility
Electrical equipment (e.g., controllers, power supplies) shall be installed in a manner that provides ready access for examination, operating, and maintenance per NEC 110.26.
Grounding and Bonding
All metallic non-current-carrying parts of equipment, where required, shall be effectively grounded and bonded in accordance with NEC 250.
Splices and Terminations
All splices and terminations of electrical conductors shall be made in approved enclosures or boxes and comply with NEC 110.14.
Wiring in Plenums/Air-Handling Spaces
Any wiring installed in environmental air-handling spaces (plenums) shall comply with the specific requirements of NEC 300.22, typically requiring plenum-rated cables.
Structural & Building Envelope Considerations (2024 IRC)
3 Rules
Mounting Integrity
All motorized shading systems shall be securely mounted to structural elements (e.g., wall studs, headers, blocking) capable of supporting the dead load and operational forces of the system per IRC R301.1 and R502.2 for framing. Fasteners must be appropriate for the substrate.
Clearances
Sufficient clearances shall be maintained around the motorized shading system to prevent interference with window operation, trim, and other building elements. Ensure the system does not hinder the intended function or maintenance of other building components.
Building Envelope Penetrations
If any wiring or components penetrate the building envelope (exterior walls), these penetrations shall be properly sealed and insulated to prevent air and moisture infiltration and maintain thermal performance per IRC Chapters 11 (Energy Efficiency) and R703 (Exterior Walls).
Fire Safety & Egress (2024 IRC)
2 Rules
Emergency Escape and Rescue Openings
Motorized window shading systems shall not impede the operation of any required emergency escape and rescue openings (windows) per IRC R310. These openings must be readily operable from the inside without the use of tools, keys, or special knowledge to allow for emergency egress.
Wiring in Fire-Resistance-Rated Assemblies
Any wiring passing through or installed within fire-resistance-rated walls, floor/ceiling assemblies, or shaft enclosures shall be installed in a manner that maintains the fire-resistance rating of the assembly per IRC R302.
DuPage County Regional Context & Non-Applicability
2 Rules
Climate & Regional Construction Standards
DuPage County's 42-inch frost depth requirement (IRC R403.1.1) is not directly applicable to interior motorized window shading systems. However, any exterior components, if part of the system, shall be rated for local climate conditions, including extreme temperature fluctuations, ice, and wind loads, and installed according to relevant IRC sections.
Illinois Plumbing Code Applicability
The Illinois Plumbing Code (77 Ill. Adm. Code 890) is generally not applicable to the installation of motorized window shading systems, as these systems do not involve water supply, drainage, or sanitary systems.