Motors, electric (except engine starting motors, gearmotors, outboard), manufacturing · Illinois

Main

Naperville, IL · ~137 workers · 3 years of OSHA Injury Tracking Application data.

D
Poor Safety Record
4.1
Avg TCR
3.3
Industry avg
0
Fatalities
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The verdict

Main runs at 124% of its industry's injury rate - more dangerous than the typical Motors, electric (except engine starting motors, gearmotors, outboard), manufacturing workplace, earning a grade D.

Main: 4.1 TCR = 124% of Motors, electric (except engine starting motors, gearmotors, outboard), manufacturing BLS 3.3 · 3y Form 300A (see methodology below)

Main safety composite

Main scores strongest on dart rate (safer than 50% of same-industry peers) and weakest on total case rate (tcr) (safer than 24%), blended into one 0-100 breakdown against same-industry peers. A missing measure drops out and redistributes its weight rather than deflating the score. This is a per-dimension breakdown, distinct from the single letter grade above it (which weights TCR alone against the BLS industry benchmark).

D

40/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 4.1 per 100 workers

Safer than 24% of industry peers

DART rate
D 0.72 per 100 workers

Safer than 50% of industry peers

Fatalities
D 0

Safer than 50% of industry peers

Benchmarked live against every credibly-rated employer in the same NAICS industry code in the current OSHA extract (a segment must have at least 8 rated peers to benchmark). Not a legal or compliance determination; PlainSafetyScore's own weighting (TCR 40%, DART 35%, fatalities 25%).

Rising injury rate

Main: 1.9 → 5.0 TCR

Peak year 2017 @ 5.4 TCR · DART/TCR 0.18× in 2018

Main's TCR rose 3.1 from 1.9 in 2016 to 5.0 in 2018. Peak filing year was 2017 at 5.4 TCR. In 2018, DART was 0.18× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 335312 · Naperville, IL ABOVE-IND · MID

Grade D · TCR 4.1 · 124% of ind

  • DART 0.7 DART
  • RANK #10/13
  • PHOTO InMotion US LLC
  • BOOK 3y book
  • INJ 19 inj
  • SIZE ~137 FTE

Nearest TCR peer: InMotion US LLC (0.0 TCR gap)

Read with this employer → · Industry book → · Illinois employers → · Look up another →

Main in the TCR neighbourhood

Average Total Case Rate among this establishment and nearest same-industry peers

TCR

What this shows Main averages 4.1 TCR (124% of the Motors, electric (except engine starting motors, gearmotors, outboard), manufacturing BLS benchmark).

Source U.S. Department of Labor, OSHA Injury Tracking Application (Form 300A) As of 2026-08-25

Main TCR series: 2016=1.9 · 2017=5.4 · 2018=5 · BLS 3.3

Where Main falls in its industry

222 Motors, electric (except engin establishments

Safer than 24% of graded establishments in this industry, whose median TCR is 2.3.

More dangerous than peersSafer than peers

Narrower to Illinois alone (the establishments it most directly competes with for workers and contracts): ranked #10 safest of 13 Motors, electric (except engin employers in Illinois.

Main (137 employees, TCR 4.1) among 29 same-industry peers, split at the industry median of 120 employees and a TCR of 2.3 2×2 strategic matrix plotting 30 entities by Average employees (X) and Total Case Rate (Y), with a crosshair dividing the plot into four quadrants. Larger & higher-riskSmaller & higher-riskLarger & saferSmaller & safer than peers 05001,0001,5002,000 02468 Average employees Total Case Rate Main
Main (137 employees, TCR 4.1) among 29 same-industry peers, split at the industry median of 120 employees and a TCR of 2.3

Main has more employees than the Motors, electric (except engine starting median and a higher injury rate than the industry's median TCR of 2.3. Workforce size and injury rate do not always move together within the same industry -- some of its smaller peers run higher rates than its larger ones, and vice versa.

Year-by-Year Safety Data

Year TCR DART Injuries Illnesses Fatalities
2018 5.0 0.7 7 0 0
2017 5.4 3.6 9 0 0
2016 1.9 1.3 3 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

335312 · IL · Naperville

222 Motors, electric (except engine starting motors, gearmotors, outboard), manufacturing employers nationwide with a credible TCR · 22,804 rated employers in Illinois with headcount on file · 241 employers in Naperville, IL · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel Establishment Metric
NAICS-TCR InMotion US LLC 4.1 TCR
NAICS-TCR McMillan Electric Company 4.1 TCR
NAICS-TCR Toledo Commutator Company 4.0 TCR
NAICS-TCR Ideal Electric Power Co. 4.0 TCR
STATE-SIZE AMEREN ILLINOIS - IL Sub Maint Ops 137 FTE
STATE-SIZE P.J. Hoerr Inc 137 FTE
STATE-SIZE Newcastle Limited LLC 137 FTE
STATE-SIZE Edwards Engineering Inc 137 FTE
CITY-NEAR Indian Prairie School District 3,568 FTE
CITY-NEAR Naperville Ill 1,349 FTE
CITY-NEAR Naperville Research Center 862 FTE
CITY-NEAR 2884 Cor3010 855 FTE
NAT-TCR Green Hill Leasing, LLC 4.1 TCR
NAT-TCR McKee Foods Corporation-VA 4.1 TCR
NAT-TCR Excel Electric, Inc. 4.1 TCR
NAT-TCR Centerlight Healthcare Chrystie 4.1 TCR
NAT-SIZE Genesis Medical Center DeWitt 137 FTE
NAT-SIZE GeoCare, Inc. DBA Home Instead Senior Care 137 FTE
NAT-SIZE Carter Nursing and Rehab 137 FTE
NAT-SIZE Consumer Solutions Division - West 137 FTE

Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →

Data Source: OSHA Injury Tracking Application (ITA), mandatory establishment-level injury/illness reports. Grades compare employer Total Case Rate (TCR) to BLS IIF industry benchmarks. Data covers years reported by this establishment: 2018, 2017, 2016. This is publicly available government data - not a legal determination of workplace conditions.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from official public datasets. See our methodology for details.