Structured Cabling Permit Requirements in Des Moines, Iowa

Installing structured cabling systems in Des Moines is relatively straightforward from a licensing perspective, thanks to Iowa's exemptions for low voltage work. This guide covers when permits are required, state exemptions for Class 2/3 circuits, and the approval process for network and telecommunications installations.

Quick Answer: Do You Need a Permit?

Generally no for basic data cabling. Iowa exempts Class 2 and Class 3 circuits from electrical licensing requirements under Iowa Code Section 103.22(11). This includes most structured cabling work for voice, video, audio, and data signals. Building permits are typically not required unless the installation involves structural modifications, penetrations through fire-rated assemblies, or work in new construction projects.

Is Structured Cabling Exempt From Licensing in Iowa?

Yes. Under Iowa Code Section 103.22(11), electrical contractor licensing is NOT required for persons engaged in:

• Class 2 or Class 3 remote control, signaling, or power-limited circuits
• Optical fiber cables and other cabling
• Communications circuits
• Raceways for voice, video, audio, and data signals
• Work in both commercial and residential settings

Class 2 and Class 3 circuits are defined by NEC Articles 725.41 and 725.121, with specific power limitations that ensure minimal fire and shock hazards.

When Are Permits Required in Des Moines?

Even with the state exemption, Des Moines may require permits for structured cabling work that involves:

• New construction - Cabling in buildings under construction requires coordination with general permits
• Fire-rated penetrations - Any cables passing through fire-rated walls, floors, or ceilings
• Plenum spaces - Installation in HVAC air handling spaces requires proper rated cables
• Structural modifications - Cutting or drilling that affects structural members
• Pathway installation - Surface-mounted or overhead cable tray systems
• Electrical connections - PoE switches or equipment requiring line voltage

Surface-mounted cabling, wireless access point mounting, and standard drop installations typically do not trigger permit requirements.

How Do I Get a Permit in Des Moines?

When permits are required, the Des Moines Permit and Development Center handles applications.

Application Process

1. Access the online portal at dsm.city
2. Submit project scope including cable pathways and equipment locations
3. Provide drawings for commercial projects showing cable routes
4. Pay applicable fees
5. Schedule inspections if required for fire stopping or pathway work

Contact Information

Des Moines Permit and Development Center
602 Robert D. Ray Drive
Des Moines, IA 50309
Phone: (515) 283-4200
Hours: Monday-Friday, 8:00 AM - 4:30 PM

Iowa Electrical Examining Board
6200 Park Ave Suite 100
Des Moines, IA 50319
Phone: (515) 725-6147
Email: elecinfo@dia.iowa.gov

What Are the Fees and Timeline?

Item	Cost/Timeline
Building Permit (if required)	Based on project value
Electrical Permit (for PoE/power)	$50-150 depending on scope
Plan Review	5-10 business days
Inspection Scheduling	24-48 hours notice
Low Voltage State License	Not required for data cabling

What Are Residential vs Commercial Requirements?

Residential Structured Cabling

Homeowners and contractors can freely install:

• Category 5e, 6, 6A, or higher ethernet cabling
• Coaxial cable for television and internet
• Fiber optic cabling
• Home networking equipment
• Wireless access points

No license or permit is required for standard residential data cabling in Iowa.

Commercial Structured Cabling

Commercial projects follow the same state exemption but often require:

• Coordination with building management for access and scheduling
• Fire stopping at all penetrations of fire-rated assemblies
• Plenum-rated cable (CMP) in air handling spaces
• Pathway permits for cable tray or conduit installations
• Inspections for fire code compliance

What Codes Apply to Structured Cabling?

Des Moines and Iowa follow:

• NEC 2023 - Iowa adopted effective January 1, 2024
• NEC Article 725 - Class 2 and Class 3 circuits
• NEC Article 800 - Communications circuits
• NEC Article 770 - Optical fiber cables
• TIA/EIA-568 - Industry standards for structured cabling

What Are Common Structured Cabling Issues?

Des Moines inspectors may flag:

• Missing fire stopping - Cables through fire-rated assemblies without proper firestop
• Incorrect cable type - CMR cable used in plenum spaces instead of CMP
• Support violations - J-hooks or supports exceeding NEC spacing requirements
• Pathway fill - Conduit or cable tray exceeding fill percentages
• Bend radius - Cable installed with bends tighter than manufacturer specifications

Pro Tips for Des Moines Structured Cabling Projects

• Document the exemption - Keep a copy of Iowa Code 103.22(11) for questions about licensing
• Use plenum cable by default - CMP cable can be used anywhere; CMR is more limited
• Coordinate fire stopping - Have firestop materials ready before inspection
• Test and certify - Provide test results to clients even if not required
• Follow TIA standards - Professional installations should meet TIA/EIA-568 requirements

Stay Ahead of Permit Activity

Want to know when structured cabling projects hit permits in Des Moines before they reach bid boards?

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