H&S Historical Evidence Library
Electrical Arc & Heat-Resistant Materials
Start with the work and material you remember, then test the history against period-specific records. This page organizes a research path; it does not establish what was present at a particular workplace.
Memory clue: Arc chutes, high-grade electrical paper, millboard, heat shields or reinforced electrical parts
Work activities worth reconstructing
- Servicing motor starters or switchgear
- Handling insulating paper or board
- Replacing heat shields
- Electrical maintenance and overhaul
Places, systems or equipment that can narrow the history
Motor controls
Switchgear
Electrical cabinets
Generators and industrial electrical systems
Time changes the answer
EPA documents historical asbestos use in arc chutes, high-grade electrical paper, millboard and reinforced plastics. Equipment identity alone does not establish the composition of a component.
Authoritative sources for this research path
- EPA — List of Uses Covered under April 2019 Final Rule
- EPA — Actions to Protect the Public from Exposure to Asbestos
- OSHA — Asbestos Overview
These sources support the generic historical relationship. They do not establish that a particular material was present at a specific workplace or encountered by a particular person.