NAICS UNIVERSITY · Free research for insurance agents
Power, Distribution, and Specialty Transformer Manufacturing
NAICS 335311 · United States · 2022 edition
This U.S. industry comprises establishments primarily engaged in manufacturing power, distribution, and specialty transformers (except electronic components). Industrial-type and consumer-type transformers in this industry vary (e.g., step up or step down) voltage but do not convert alternating to direct or direct to alternating current.
Start the review with products liability.
For Power, Distribution, and Specialty Transformer Manufacturing, the saved research highlights products liability, employee injuries, fire and explosion. Confirm how these arise in the actual operation, what controls are used and whether additional services change the proposed coverage.
Questions to ask
- What types of transformers are manufactured — distribution, power, specialty — and what are the primary end-use markets (utility, industrial, commercial)?
- What insulating fluids are used in production, and is there any history of PCB-containing fluid use on-site?
- What is the typical per-unit value of finished products, and are there any large custom or sole-source supply contracts?
- What percentage of sales goes to domestic versus international markets?
- Any prior product liability claims or known field failures?
- Are there any environmental compliance orders, remediation requirements, or known site contamination issues?
- For Power, Distribution, and Specialty Transformer Manufacturing, what should the underwriter know about manufacturing transformers for utility transmission or substation use, where downstream failure consequences are especially severe?
- For Power, Distribution, and Specialty Transformer Manufacturing, what should the underwriter know about history of product liability claims tied to transformer failure or electrical fire events?
Activities described by this code
- Fluorescent ballasts (i.e., transformers) manufacturing
- Substation transformers, electric power distribution, manufacturing
- Distribution transformers, electric, manufacturing
- Transmission and distribution voltage regulators manufacturing
Other activities to examine
Census classification reference
For educational purposes only. AI-generated insurance research and automated logic can contain errors. Independently verify classification and coverage decisions.
Compare another operationInsurance operations research — draft
Establishments in this class manufacture power transformers, distribution transformers, and specialty transformers used to step voltage up or down in electrical distribution systems. Day-to-day operations typically involve copper or aluminum winding, core fabrication, insulating fluid filling, high-voltage testing, and finished unit assembly. Products may range from small specialty units to large substation transformers shipped to utility and industrial customers.
Questions to investigate
- What types of transformers are manufactured — distribution, power, specialty — and what are the primary end-use markets (utility, industrial, commercial)?
- What insulating fluids are used in production, and is there any history of PCB-containing fluid use on-site?
- What is the typical per-unit value of finished products, and are there any large custom or sole-source supply contracts?
- What percentage of sales goes to domestic versus international markets?
This insurance research was generated in April 2026. It has not received a complete human review. The October 12, 2026 audit checked codes and titles only, not descriptions or coverage assertions.