Walker Telecomm holds two federal NAICS construction codes that frame our scope of work: NAICS 237130 for power and communication line infrastructure, and NAICS 238210 for electrical and wiring installation. Both codes are essential to how we serve building owners, architects, and program managers on federal and commercial projects. Understanding what each code covers—and what falls under Walker's work within it—clarifies our role in design-build projects from end to end.
NAICS 237130: Power and Communication Line and Related Structures Construction
NAICS 237130 covers establishments engaged in the construction of power lines, communication lines, and related structures. The official scope includes new work, reconstruction, rehabilitation, and repairs to all structures integral to power and communication networks.
Within this code, Walker's work centers on outside plant (OSP) infrastructure and communication line installation:
- Underground and overhead fiber optic cable laying and splicing
- Communications conduit and cable tray installation and support structure construction
- Backhaul and backbone fiber routes serving commercial and federal campuses
- Cable vault and terminal equipment shelter construction and integration
This classification applies to the heavy infrastructure that enables connectivity—the backbone systems that sit between network equipment and the field. Whether we're installing conduit runs for a federal data center expansion or pulling fiber for a campus network, NAICS 237130 is the governing code.
NAICS 238210: Electrical Contractors and Other Wiring Installation Contractors
NAICS 238210 encompasses establishments engaged in installing and servicing electrical wiring and equipment. The scope is broad and explicit: these contractors perform new work, additions, alterations, maintenance, and repairs. Labor and materials are both included.
Walker's work under this code includes low-voltage systems and structured cabling installations across federal and commercial facilities:
- Structured data cabling systems (Cat6A, Cat7, fiber optic indoor plant)
- Fire alarm, security system, and access control wiring and installation
- Audiovisual (AV) and broadcast system wiring and integration
- Data center power distribution, grounding, and equipment interconnection
- Wireless infrastructure cabling (backbone and access point runs)
- Building automation system (BAS) wiring and control installation
NAICS 238210 also explicitly covers fiber optic cable installation (except transmission line), which applies to indoor backbone cabling in facilities. This code is where the majority of our design-build work lives—the systems that connect building users to networks, security, and life-safety infrastructure.
The Distinction: NAICS 237130 is utility-scale outside plant; 238210 is facility-side electrical and low-voltage systems. Walker holds both because modern projects require seamless integration from the campus backbone through the building entrance and into the wall.
How They Work Together in Practice
On a campus fiber project, Walker may design and build the underground vault system and conduit backbone (237130), then transition to the data center termination plant, rack cabling, and facility distribution systems (238210). On a federal facility security upgrade, we install the outer perimeter conduit and cable routes alongside the internal fire and security wiring.
The two codes are complementary; a single project often spans both. Federal contracting vehicles and commercial specifications reference these codes directly when defining scope and pricing, so holding both ensures we can execute end-to-end without claiming work outside our classifications.
For building owners and program managers, the takeaway is straightforward: when Walker bids a communications or electrical infrastructure project, these codes define what we do, who we are federally, and where our liability and bonding apply. They're not marketing language—they're the legal and regulatory boundary of our expertise.