Electrical equipment manufacturing (NAICS 33531): average TRIR and DART
These are the 2024 private-industry incidence rates from the U.S. Bureau of Labor Statistics, per 100 full-time-equivalent workers. Prequalification forms often ask whether your TRIR and DART are at or below these numbers.
Other recordable cases: 0.7. "Not published" means the data does not meet BLS publication guidelines.
What this means for your prequal form
Worked example: a company in this industry with 100,000 hours worked in a year (about 50 full-time employees) would match the industry average at 0.9 recordable cases. With 400,000 hours (about 200 employees) the figure is 3.6.
TRIR = recordable cases × 200,000 ÷ hours worked. DART = (days-away cases + restricted/transfer cases) × 200,000 ÷ hours worked. Use your OSHA 300A totals for each calendar year.
Parent industry: Electrical equipment manufacturing (NAICS 3353), TRC 1.8, DART 1.1.
Detailed industries under NAICS 33531
| NAICS | Industry | TRC | DART |
|---|---|---|---|
| 335311 | Power, distribution, and specialty transformer manufacturing | 3.0 | 2.4 |
| 335312 | Motor and generator manufacturing | 1.8 | 1.0 |
| 335313 | Switchgear and switchboard apparatus manufacturing | 1.7 | 0.7 |
| 335314 | Relay and industrial control manufacturing | 0.9 | 0.5 |
Source: BLS Survey of Occupational Injuries and Illnesses, Table 1 (2024). NAICS 2017 codes as published by BLS.