NAICS 335932 Quarterly Industry Report
Noncurrent-Carrying Wiring Device Manufacturing
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 335932Sector: 33Updated: Q1 2026
About This Report
This Fair Market Value industry report for NAICS 335932 draws on verified data from the U.S. Census Bureau[5], Bureau of Labor Statistics[6], and the Small Business Administration[7]. Our research team compiles establishment counts, employment data, and SBA eligibility criteria specific to noncurrent-carrying wiring device manufacturing. Reports are updated quarterly to reflect new Census releases and regulatory changes.
Industry Snapshot
Key metrics for the noncurrent-carrying wiring device manufacturing industry.
Industry Definition & Overview
Noncurrent-Carrying Wiring Device Manufacturing (NAICS 335932) encompasses establishments primarily engaged in manufacturing noncurrent-carrying wiring devices that protect, route, and enclose electrical wiring without carrying electric current themselves. Products include metallic and nonmetallic conduit fittings, junction boxes and outlet boxes, electrical faceplates and wallplates, cable trays and wireways, surface-mounted raceways, floor boxes, and pull boxes for commercial and industrial wiring systems. The U.S. Census Bureau[5] classifies this industry under wiring device manufacturing.
Roughly 171 active businesses employ an estimated 11,300 workers in this industry. Production spans from stamped steel outlet boxes produced at high volumes on progressive die presses to custom-fabricated cable tray systems engineered for specific industrial plant and data center installations. Steel, aluminum, and thermoplastic PVC represent the primary raw materials. Box and fitting production runs on automated stamping and forming lines, while raceway and cable tray operations involve roll forming, welding, and powder coating processes.
National Electrical Code requirements dictate box fill calculations, conduit sizing, and fitting specifications that directly determine product demand volumes for each building project. Changes to NEC code cycles create new product requirements; recent editions mandated larger boxes for increased conductor counts in residential wiring. Commercial construction and industrial plant maintenance drive the majority of demand. Data center construction has become a notable growth category as operators specify extensive cable management systems including overhead cable trays, underfloor raceways, and high-density fiber management panels to organize thousands of network and power cables within each facility.
What's Included in This Industry
- Conduit fitting and connector manufacturing
- Junction box and outlet box production
- Electrical faceplate and wallplate manufacturing
- Cable tray and wireway production
- Surface raceway manufacturing
- Floor box and access fitting production
- Pull box and splice box manufacturing
- Weatherproof box and cover production
- Electrical strut and channel manufacturing
- Nonmetallic conduit body production
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Electrical Equipment, Appliance, and Component Manufacturing | 335 |
| Industry Group | Other Electrical Equipment and Component Manufacturing | 3359 |
| NAICS Industry | Wiring Device Manufacturing | 33593 |
| National Industry | Noncurrent-Carrying Wiring Device Manufacturing | 335932 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 335931 | Current-Carrying Wiring Device Manufacturing | Manufactures current-carrying wiring devices like receptacles and switches that mount inside the junction boxes and faceplates produced in this noncurrent-carrying device classification |
| 335929 | Other Communication and Energy Wire Manufacturing | Produces insulated wire and cable that routes through the conduit fittings, raceways, and cable trays manufactured in this industry for building electrical installations |
| 335313 | Switchgear and Switchboard Apparatus Manufacturing | Manufactures switchgear and switchboard enclosures for high-power distribution rather than the branch circuit boxes and conduit fittings produced in this classification |
| 332312 | Fabricated Structural Metal Manufacturing | Produces fabricated structural metal products classified separately from the stamped and formed electrical boxes and fittings manufactured specifically for wiring systems |
| 326199 | All Other Plastics Product Manufacturing | Manufactures plastic products including nonmetallic conduit and fittings that overlap with some products in this classification but covers broader plastics manufacturing |
| 335999 | All Other Miscellaneous Electrical Equipment and Component Manufacturing | Produces miscellaneous electrical equipment not classified elsewhere, distinguished from the specific conduit fittings and wiring enclosures covered by this dedicated code |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | California | 13.3% | 17 |
| 2 | Texas | 12.5% | 16 |
| 3 | Ohio | 11.7% | 15 |
| 4 | Illinois | 7.8% | 10 |
| 5 | Pennsylvania | 7.8% | 10 |
| 6 | Missouri | 5.5% | 7 |
| 7 | Georgia | 4.7% | 6 |
| 8 | North Carolina | 3.9% | 5 |
| 9 | Tennessee | 3.9% | 5 |
| 10 | Kentucky | 3.1% | 4 |
% Of Establishments
0%
13%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
16
Total SBA Loans
$27.6M
Total Loan Volume
$1.7M
Average Loan Size
18 yrs
Average Loan Term
8.35%
Average Interest Rate
104
Jobs Supported
Source: SBA 7(a) Program Data, U.S. Small Business Administration — FY 2025[4]
Key Insight: The SBA[7] sets the size standard for NAICS 335932 at 500 employees. Firms below this threshold qualify for small business set-aside contracts and SBA-backed lending programs. Federal procurement includes conduit fittings for military base electrical upgrades, junction boxes for VA medical center construction, and cable tray systems for government data centers. The SBA's contracting programs[8] support manufacturers pursuing Army Corps of Engineers and General Services Administration electrical supply contracts. Eligible businesses can access SBA 7(a) loans[9] for working capital, equipment, and acquisition financing, while 504 loans[10] support major fixed-asset purchases including real estate and heavy machinery.
Top SBA Lenders
| # | Lender | Loans | Volume | Avg Loan |
|---|---|---|---|---|
| 1 | Bank of America, National Association | 8 | $25.6M | $3.2M |
| 2 | Liberty Bank | 8 | $2.0M | $250K |
Frequently Asked Questions
Common questions about this industry.
What types of businesses are classified under NAICS 335932?
Manufacturers of noncurrent-carrying wiring devices classify here. Products include conduit fittings, junction boxes, outlet boxes, faceplates, cable trays, wireways, raceways, floor boxes, and pull boxes per the Census Bureau[5] classification.
How is the noncurrent-carrying wiring device industry structured?
Roughly 171 businesses employ an estimated 11,300 workers per Census data[11]. Large manufacturers dominate stamped steel box and commodity fitting production while smaller firms serve specialty segments including custom cable tray fabrication and engineered raceway systems for data center installations.
What is the SBA size standard for NAICS 335932?
The SBA[7] sets the threshold at 500 employees. Businesses with fewer than 500 average employees qualify as small for federal contracting preferences and SBA-backed financing programs including 7(a) and 504 loans.
What NAICS codes are related to noncurrent-carrying wiring device manufacturing?
Related codes include 335931 (Current-Carrying Wiring Devices), 335929 (Wire and Cable), 335313 (Switchgear), 332312 (Fabricated Structural Metal), 326199 (Plastics Products), and 335999 (Miscellaneous Electrical Equipment). Each covers products that interact with but differ from the wiring enclosures and cable management products in this code.
What industries purchase noncurrent-carrying wiring devices?
Electrical contractors, electrical wholesalers, commercial builders, data center operators, and steel producers interact most directly. Every new building construction and renovation project requires conduit fittings, boxes, and cable management products, making commercial and residential construction the primary demand drivers.
What activities are included in NAICS 335932?
Activities include manufacturing stamped steel junction and outlet boxes, producing metallic and nonmetallic conduit fittings, fabricating electrical faceplates and wallplates, manufacturing cable tray and wireway sections, producing surface-mounted raceways, assembling floor box and access fitting units, and manufacturing weatherproof enclosures and pull boxes for outdoor wiring installations.
Can noncurrent-carrying wiring device manufacturers qualify for SBA loans?
Yes, firms below 500 employees qualify for SBA lending programs[8] including 7(a) and 504 loans. Progressive die stamping presses, roll forming lines, powder coating systems, and automated packaging equipment represent capital investments suited to SBA 504 equipment financing.
Where are noncurrent-carrying wiring device manufacturers concentrated?
Production concentrates in the Midwest and Southeast near steel supply sources and major construction markets. Facilities in Illinois, Tennessee, Texas, and Pennsylvania serve national distribution networks through electrical wholesale channels. Proximity to galvanized steel coil suppliers and major metropolitan construction markets influences plant location decisions for manufacturers of high-volume stamped box and fitting products.
Sources & References
Government datasets and editorial sources used in this report.
- [1]U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages bls.gov
- [2]U.S. Census Bureau, Economic Census census.gov
- [3]U.S. Census Bureau, County Business Patterns census.gov
- [4]U.S. Small Business Administration, SBA 7(a) Loan Program Data data.sba.gov
- [5]U.S. Census Bureau census.gov
- [6]Bureau of Labor Statistics bls.gov
- [7]Small Business Administration sba.gov
- [8]SBA's contracting programs sba.gov
- [9]SBA 7(a) loans sba.gov
- [10]504 loans sba.gov
- [11]Census data naicslist.com
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