Members of the International Brotherhood of Electrical Workers (IBEW) were allegedly the trade most-proximate to the following categories of asbestos-containing products across the asbestos era (roughly the pre-war era through the late 1970s, with adjacent product categories persisting later). Each category links to the corresponding manufacturer history and trust-fund eligibility documentation on AsbestosIndex (asbestos-products.com).
Asbestos-fabric arc chute plates + molded De-Ion arc quenching plates — the trade’s dominant exposure
The defining product category of the trade. From the pre-war era through the late 1970s, medium-voltage air-magnetic circuit breakers, motor-starter contactor arc chutes, and metal-clad and metal-enclosed switchgear lineups relied on asbestos-fabric arc chute plates and molded De-Ion arc quenching plates to elongate, cool, and de-ionize the arc as the breaker or contactor interrupted a fault or motor-starting inrush. IBEW inside wiremen, substation electricians, and motor-control-center wiremen were the trade inside the cabinet — racking breakers, changing arc chutes after fault-clearing events, inspecting contactor tips, and maintaining lineups whose arc chute plates cracked, spalled, and shed asbestos fibers with every operation. According to publicly filed asbestos litigation records, the historic suppliers to this market allegedly included:
- Westinghouse De-Ion arc chutes — the flagship medium-voltage air-magnetic breaker platform (DHP, 50-DH, 150-DH) with molded De-Ion arc quenching plates
- GE Magne-Blast arc chutes — the competing medium-voltage air-magnetic breaker platform (AM-4.16, AM-13.8) with asbestos-fabric arc chutes
- Federal Pacific FPE switchgear — metal-clad and metal-enclosed switchgear with asbestos-fabric arc chutes
- Allen-Bradley contactor arc chutes — motor-starter contactor arc chutes in industrial MCCs
- Square D Model 6 MCC contactor arc chutes — the industry-standard motor control center platform
- I-T-E Imperial HK breakers — molded-case and metal-clad switchgear with asbestos-fabric arc chutes
- Cutler-Hammer / Eaton switchgear — motor-starter and switchgear arc chutes
- GE isolated-phase bus duct — generator step-up bus duct with asbestos-fabric internal insulation
Switchgear arc chutes on AsbestosIndex →
Asbestos-fabric electrical winding insulation
IBEW motor-rewind mechanics in captive industrial motor-rewind shops, utility transformer shops, and independent motor-rewind service houses allegedly stripped, taped, and re-varnished motors, generators, and transformers using asbestos-fabric slot liners, asbestos-fabric coil tape, asbestos-fabric lead-wire insulation, and asbestos-fabric phase separators across the era. Substation electricians allegedly terminated substation power transformers whose internal windings and lead wires were asbestos-fabric. According to publicly filed asbestos litigation records, the historic suppliers to this market allegedly included:
- GE locomotive traction motor winding insulation — GE 752 and predecessor traction motor windings with asbestos-fabric slot liners and coil tape
- GE substation transformer + radiator gasket — GE substation power transformer internal winding insulation and radiator flange gaskets
- Westinghouse substation power transformer lead-wire insulation — Westinghouse substation transformer bushing lead-wire and internal-connection insulation
- GE Frame 5 industrial turbine winding — GE Frame 5 industrial gas-turbine generator winding insulation
Transformer + winding insulation on AsbestosIndex →
Asbestos-fiber cable + wire jackets
IBEW cable splicers and inside wiremen allegedly cut back, split, terminated, and pulled medium-voltage underground cables whose insulation and outer jackets were asbestos-fiber across the era. Cable-splicing work in confined manholes, pull-boxes, and utility vaults allegedly aerosolized asbestos-fiber jacket dust directly into the splicer’s breathing zone. According to publicly filed asbestos litigation records, the historic suppliers to this market allegedly included:
| Product | Where used |
|---|---|
| Okonite medium-voltage underground cable jacket | Utility distribution + industrial-plant underground cable |
| General Cable underground power cable | Utility + industrial underground power cable |
| Anaconda Wire & Cable underground service | Utility distribution underground service cable |
| Pirelli high-voltage transmission cable | Underground high-voltage transmission cable |
| B&W nuclear asbestos-fabric cable insulation | Nuclear plant Class 1E and containment penetration cable |
Cable + wire jackets on AsbestosIndex →
Asbestos-fiber transmission-line insulator components
IBEW outside linemen allegedly assembled and re-assembled porcelain transmission-line suspension-string insulators whose cementing compound between porcelain skirts and the metal cap was allegedly asbestos-fiber cement across the era. Field-assembly, replacement, and salvage operations on transmission-tower suspension strings allegedly aerosolized asbestos-fiber cement dust into the lineman’s breathing zone. According to publicly filed asbestos litigation records, the historic suppliers to this market allegedly included:
- Ohio Brass porcelain transmission-line suspension-string cement — Ohio Brass suspension-string insulators with asbestos-fiber cement between porcelain skirt and metal cap
- Lapp Insulator porcelain mounting cement — Lapp station-post and suspension insulator porcelain mounting cement
Transmission-line insulators on AsbestosIndex →
Asbestos-cement bulkhead panels + insulator components — electrical rooms + rectifier buildings
Inside construction wiremen and substation electricians allegedly installed asbestos-cement bulkhead barriers, rectifier-room walls, and switchgear-room barriers inside electrical rooms, motor control center rooms, rectifier buildings (aluminum-potline rectifier houses, DC-transit rectifier stations, industrial rectifier rooms), and substation control houses across the era. Cutting sheet to size at the jobsite with power saws and shears allegedly aerosolized asbestos-cement dust into the wireman’s breathing zone. According to publicly filed asbestos litigation records, the historic suppliers to this market allegedly included:
| Product | Where used |
|---|---|
| Johns-Manville Transite asbestos-cement panels | Electrical-room bulkhead barriers, rectifier-house walls |
| CertainTeed asbestos-cement panels | Electrical-room and substation control-house panels |
| Nicolet asbestos-cement panels | Industrial electrical-room wall + roof panels |
Transite pipe + panel on AsbestosIndex →
Adjacent hazard — asbestos pipe covering + block insulation
Inside construction wiremen, substation electricians, and MCC wiremen allegedly ran conduit, pulled cable, and terminated equipment directly adjacent to asbestos pipe covering and asbestos block insulation on power-plant main steam and hot reheat piping, refinery process steam and utility piping, chemical-plant steam mains, hospital and university central-plant steam distribution, and industrial-plant steam headers across the era. The pipe covering was installed by the Heat & Frost Insulators (HFIAW) — but IBEW members allegedly worked in the same electrical rooms, mechanical rooms, penthouses, tunnels, and pipe galleries where that pipe covering was cracking, shedding, being cut for repair, and being torn out for replacement.
Cross-links — full product histories on AsbestosIndex
- Transformer trade product hub — asbestos-fabric arc chute plates, molded De-Ion arc quenching plates, asbestos-fabric winding insulation, asbestos-fiber cable jackets, asbestos-fiber transmission-line insulator cement
- Transite pipe + panel — Johns-Manville, CertainTeed, and Nicolet asbestos-cement bulkhead panels
- Sprayed fireproofing — sprayed asbestos fireproofing on structural steel in electrical rooms and switchgear rooms of asbestos-era commercial high-rises
- Refractory brick — asbestos-refractory brick + castable adjacent to BOF-shop and blast-furnace electrical rooms
Manufacturer trust funds applicable to IBEW electrical worker claims
Many of the manufacturers that supplied the products above are now defunct, having filed for bankruptcy under the weight of asbestos litigation. Their bankruptcy estates funded asbestos trust funds — currently holding more than $30 billion — that pay claims to workers and families with documented exposure to their products. IBEW-relevant trusts allegedly include the Federal-Mogul / Federal Pacific trust (FPE switchgear), the Johns-Manville trust (Transite asbestos-cement bulkhead panels), the Babcock & Wilcox trust (B&W nuclear cable insulation), the Owens-Corning / Fibreboard trust, and, through separate solvent-defendant civil litigation, claims against successor entities of Westinghouse, GE, Square D, Cutler-Hammer / Eaton, I-T-E, Allen-Bradley, Okonite, General Cable, Anaconda, Pirelli, Ohio Brass, and Lapp Insulator, among others.
See Trust Funds for the full list of applicable trusts.
Visit AsbestosIndex (the full product + manufacturer catalog) →
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