NAICS 335931

Overview

The North American Industry Classification System (NAICS) is the federal statistical standard for categorizing business establishments to enable consistent collection, analysis, and publication of economic data across the U.S., Canada, and Mexico. Developed under OMB auspices and first implemented in 1997, NAICS is revised on a five-year cycle; the current U.S. vintage is 2022. ¹
NAICS 335931 covers establishments primarily engaged in manufacturing current-carrying wiring devices. Official examples include bus bars (non-switchgear type), GFCIs, lamp holders, lightning arresters and coils, receptacles, and wiring switches. Cross-references direct electronic connectors to 334417, electronic component-type sockets/switches to 334419, and noncurrent-carrying wiring devices to 335932. ²

See also on G2X:

• NAICS 335931 overview
• NAICS 335932 overview
• NAICS 334417 overview

What this NAICS covers

• Manufacturing electrical bus bars and conductors (except switchgear-type). ²
• Producing ground-fault circuit interrupters (GFCIs). ²
• Making lamp holders. ²
• Manufacturing lightning arresters and lightning coils. ²
• Producing electrical receptacles (outlets). ²
• Manufacturing wiring switches (e.g., pressure, pushbutton, snap, tumbler). ²

Related NAICS and PSC codes

Type	Code	Descriptor
NAICS	335932	Noncurrent-Carrying Wiring Device Manufacturing
NAICS	334417	Electronic Connector Manufacturing
PSC	5930	Switches
PSC	6250	Ballasts, Lampholders and Starters

Key cross-references and exclusions

• Electronic component-type connectors are out of scope; classify under 334417. ²
• Electronic component-type sockets and switches are excluded; classify under 334419. ²
• Noncurrent-carrying wiring devices (e.g., boxes, conduits, face plates) belong in 335932. ²

Frequently asked questions

• What products fall under NAICS 335931?
  Census lists current-carrying wiring devices such as bus bars (non-switchgear), GFCIs, lamp holders, lightning arresters/coils, receptacles, and wiring switches. These are components that conduct electrical current within building or equipment wiring and are distinct from enclosures or fittings that do not carry current. ²

• How is NAICS 335931 different from 335932?
  335931 covers devices that carry current (e.g., switches, outlets, GFCIs), whereas 335932 covers noncurrent-carrying devices (e.g., boxes, conduits, covers). Census cross-references explicitly separate current-carrying devices from fittings, enclosures, and other noncurrent-carrying equipment. ²

• Do electronic connectors and sockets fit in 335931?
  No. Electronic connectors are assigned to 334417, and electronic component-type sockets/switches are assigned to 334419. NAICS differentiates electronic component categories from wiring device manufacturing to avoid double-counting and ensure consistent classifications. ²

• Which PSC codes commonly align with these products?
  PSC 5930 (Switches) and PSC 6250 (Ballasts, Lampholders and Starters) often correspond to federal purchases of wiring devices and lighting components. Agencies use these PSCs for cataloging and procurement tracking of related products. Official PSC titles appear in government resources. ³

• Did NAICS 335931 change in the 2022 NAICS update?
  Not specified by official sources ².

Useful resources

• U.S. Census Bureau — NAICS 2022 code 335931 page (definition, examples, cross-references). ²
• GSA Acquisition — Product and Service Code resources (official PSC listings). ³
• U.S. Census Bureau — Implementation of the 2022 NAICS (current vintage, timeline, and context). ⁴

References

1. U.S. Census Bureau — About Industry: overview and NAICS update history. https://www.census.gov/topics/employment/industry-occupation/about/industry.html
2. U.S. Census Bureau — NAICS 2022: code 335931 (definition, examples, cross-references). https://www.census.gov/naics/?input=335931&year=2022
3. GSA Acquisition — DFARS PGI Part 208 resources (PSC titles and references). https://www.acquisition.gov/dfarspgi/pgi-part-208-required-sources-supplies-and-services
4. U.S. Census Bureau — The Census Bureau’s Implementation of the 2022 NAICS. https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html