Square D Corporation — now Schneider Electric — was a major manufacturer of electrical equipment including circuit breakers, motor starters, panelboards, and switchgear. The company’s manufacturing operations used asbestos-containing phenolic molding compounds to produce the plastic enclosures, housings, and components required for electrical equipment throughout the asbestos era.

Asbestos use period

Square D used phenolic molding compounds containing asbestos through the mid-1970s, consistent with industry-wide timelines for phenolic compound reformulation. The electrical equipment industry was a primary consumer of asbestos-phenolic compounds due to the material’s heat resistance and electrical insulating properties.

Documented facilities

  • Lexington, Kentucky — Circuit breakers, motor starters, and motors for electrical panel boxes and transformers. This facility is specifically named in publicly filed asbestos litigation as a site where workers were exposed to asbestos-containing phenolic molding compounds.

Square D operated multiple manufacturing facilities across the United States during the asbestos era; the Lexington plant is the most thoroughly documented in available litigation records.

Products manufactured with phenolic compounds

  • Circuit breakers
  • Motor starters and contactors
  • Electrical panel enclosures and housings
  • Switches and switchgear components
  • Load centers

These products required the dimensional stability, heat resistance, and electrical insulating properties provided by asbestos-filled phenolic compounds. Workers who molded, trimmed, drilled, or machined these parts were exposed to asbestos dust from the phenolic compound.

Worker exposure pathways

Workers at the Lexington facility and other Square D plants were exposed during:

  • Press loading — pouring or scooping granular phenolic compound into compression molds
  • Flash trimming — removing excess material from molded parts with files, knives, or trimming tools
  • Finishing operations — drilling, tapping, and machining cured phenolic parts
  • Quality control and handling — inspecting and sorting finished parts throughout the day

The Lexington facility is documented in asbestos litigation as a site where workers developed mesothelioma and asbestos-related disease from compound exposure.

Successor liability

Square D was acquired by Schneider Electric in 1991. Schneider Electric carries successor liability for Square D’s asbestos-era manufacturing operations and is the active defendant in Square D-related asbestos claims.

If you worked at Square D

Workers who handled phenolic molding compound or worked near press operations at any Square D facility may have been exposed to asbestos. Employment records, union dispatch records, and social security earnings statements can help document exposure history.

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References to manufacturers, products, and litigation history reflect what has been alleged or documented in publicly filed asbestos litigation, federal regulatory records, and industry archives. This information does not constitute a finding of fact or liability.