NAICS 335313 Quarterly Industry Report
Switchgear and Switchboard Apparatus Manufacturing
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 335313Sector: 33Updated: Q1 2026
About This Report
This Fair Market Value industry report for NAICS 335313 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 switchgear and switchboard apparatus manufacturing. Reports are updated quarterly to reflect new Census releases and regulatory changes.
Industry Snapshot
Key metrics for the switchgear and switchboard apparatus manufacturing industry.
Industry Definition & Overview
Switchgear and Switchboard Apparatus Manufacturing (NAICS 335313) encompasses establishments primarily engaged in manufacturing switchgear, switchboard apparatus, ducts for electrical switchboard apparatus, and power switching equipment. Products include circuit breakers for utility and industrial power systems, panelboards and load centers for commercial and residential buildings, metal-clad switchgear assemblies, automatic transfer switches, and power distribution units. The U.S. Census Bureau[5] classifies this industry under electrical equipment manufacturing.
Roughly 189 active businesses employ an estimated 31,700 workers in this industry. Production segments by voltage class: low-voltage switchgear (below 1,000V) serves commercial buildings and light industrial facilities, medium-voltage switchgear (1kV to 38kV) serves industrial plants and utility distribution substations, and high-voltage switchgear (above 38kV) serves utility transmission networks. Custom-engineered medium and high-voltage switchgear assemblies require substantial engineering design work for each order, with lead times ranging from 20 to 52 weeks depending on complexity and component availability.
Manufacturing processes include sheet metal fabrication for enclosures, copper and aluminum busbar bending and plating, vacuum interrupter assembly for medium-voltage breakers, and extensive factory testing of assembled switchgear lineups. Arc flash protection requirements under NFPA 70E and IEEE C37 standards drive product design toward arc-resistant enclosure configurations. Data center construction has emerged as a major demand driver for low-voltage switchgear and power distribution equipment, with hyperscale operators specifying custom configurations for high-density electrical distribution serving server rack installations.
What's Included in This Industry
- Circuit breaker manufacturing for power distribution
- Panelboard and load center production
- Metal-clad switchgear assembly manufacturing
- Automatic transfer switch production
- Power distribution unit manufacturing
- Fuse and fuse equipment production
- Motor control center manufacturing
- Busway and busduct system production
- Medium-voltage switchgear assembly
- Electrical switchboard manufacturing
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Electrical Equipment, Appliance, and Component Manufacturing | 335 |
| Industry Group | Electrical Equipment Manufacturing | 3353 |
| NAICS Industry | Electrical Equipment Manufacturing | 33531 |
| National Industry | Switchgear and Switchboard Apparatus Manufacturing | 335313 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 335311 | Power, Distribution, and Specialty Transformer Manufacturing | Manufactures power and distribution transformers that pair with switchgear in substation installations but classifies under a separate transformer manufacturing code |
| 335312 | Motor and Generator Manufacturing | Produces electric motors and generators that consume or produce the electrical power controlled and protected by the switchgear manufactured in this classification |
| 335314 | Relay and Industrial Control Manufacturing | Manufactures relays and industrial control devices that operate within switchgear assemblies but classifies separately from the switchgear enclosures and busbar systems produced here |
| 335931 | Current-Carrying Wiring Device Manufacturing | Produces wiring devices such as receptacles and wall switches for building electrical systems rather than the power-level switchgear and circuit breakers manufactured in this industry |
| 335932 | Noncurrent-Carrying Wiring Device Manufacturing | Manufactures noncurrent-carrying wiring devices and conduit fittings rather than the current-interrupting switchgear and power distribution apparatus produced in this classification |
| 335999 | All Other Miscellaneous Electrical Equipment and Component Manufacturing | Manufactures miscellaneous electrical equipment not classified elsewhere, distinguished from the specific switchgear and switchboard products covered by this dedicated industry code |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | Texas | 9.5% | 43 |
| 2 | California | 9.0% | 41 |
| 3 | Ohio | 6.8% | 31 |
| 4 | Illinois | 6.8% | 31 |
| 5 | Pennsylvania | 5.3% | 24 |
| 6 | New York | 4.6% | 21 |
| 7 | Wisconsin | 4.4% | 20 |
| 8 | Florida | 4.0% | 18 |
| 9 | Michigan | 3.5% | 16 |
| 10 | Georgia | 3.3% | 15 |
% Of Establishments
0%
9%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
8
Total SBA Loans
$2.0M
Total Loan Volume
$250K
Average Loan Size
7 yrs
Average Loan Term
10.00%
Average Interest Rate
0
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 335313 at 1,250 employees. Firms below this threshold qualify for small business set-aside contracts and SBA-backed lending programs. Federal procurement includes switchgear for military base power distribution, panelboards for VA medical centers, and automatic transfer switches for federal building emergency power systems. The SBA's contracting programs[8] support manufacturers pursuing Army Corps of Engineers and General Services Administration electrical equipment 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 | Old National Bank | 8 | $2.0M | $250K |
Frequently Asked Questions
Common questions about this industry.
What types of businesses are classified under NAICS 335313?
Manufacturers of switchgear, switchboard apparatus, and power switching equipment classify here. Products include circuit breakers, panelboards, metal-clad switchgear, automatic transfer switches, motor control centers, fuses, and busway systems per the Census Bureau[5] classification.
How is the switchgear manufacturing industry structured?
Roughly 189 businesses employ an estimated 31,700 workers per Census data[11]. A few large manufacturers dominate standard product lines while numerous smaller firms build custom-engineered medium-voltage switchgear assemblies and specialty power distribution equipment for industrial and data center applications.
What is the SBA size standard for NAICS 335313?
The SBA[7] sets the threshold at 1,250 employees. Businesses with fewer than 1,250 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 switchgear manufacturing?
Related codes include 335311 (Transformers), 335312 (Motors and Generators), 335314 (Relays and Controls), 335931 (Wiring Devices), 335932 (Noncurrent Wiring Devices), and 335999 (Miscellaneous Electrical Equipment). Each covers electrical products distinct from the switchgear and power distribution apparatus in this code.
What industries purchase switchgear and switchboard apparatus?
Electrical contractors, power line construction firms, transformer manufacturers, commercial builders, and data center operators purchase switchgear products. Building construction drives steady demand for panelboards and load centers while data center expansion and utility grid upgrades create additional demand for custom-engineered medium-voltage switchgear assemblies.
What activities are included in NAICS 335313?
Activities include manufacturing circuit breakers for power distribution, producing panelboards and load centers, assembling metal-clad switchgear lineups, fabricating automatic transfer switches, manufacturing motor control centers, producing busway and busduct systems, and building custom power distribution units for industrial and data center electrical systems.
Can switchgear manufacturers qualify for SBA loans?
Yes, firms below 1,250 employees qualify for SBA lending programs[8] including 7(a) and 504 loans. Sheet metal fabrication equipment, busbar bending and plating lines, high-potential test stations, and arc resistance testing chambers represent capital investments suited to SBA 504 equipment financing.
Where are switchgear manufacturers concentrated?
Manufacturing concentrates in the Southeast, Midwest, and Texas, with major facilities near industrial centers and electrical contractor markets. Proximity to copper and aluminum suppliers and to construction markets influences facility locations. Several global electrical equipment manufacturers operate U.S. switchgear plants to meet Buy American requirements for federal construction projects and utility procurement.
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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