1910.304 Wiring Design: citations, penalties and recently cited employers
Data as of October 5, 2026 · citations issued Oct 5, 2025 to Oct 5, 2026
Covers the design and protection of electrical wiring, including use and identification of grounded and grounding conductors, correct polarity of connections, branch circuits, outside conductors, overcurrent protection, and system and equipment grounding. Ground-fault circuit-interrupter protection is required for certain receptacles, and grounding paths from circuits and equipment must be permanent, continuous, and effective. Missing ground pins, reversed polarity, and open ground circuits are typical issues.
What the standard requires
- Maintain correct polarity and do not reverse grounded conductors
- Provide overcurrent protection for conductors and equipment
- Ground electrical systems and equipment effectively
- Provide ground-fault protection where required
Hazards it addresses
- Electric shock from ungrounded equipment
- Electrical fires from overloaded circuits
Cited in manufacturing, restaurants, retail, and older industrial facilities.
Plain-language summary written for this site; it is not the regulatory text and not legal advice. Read the official text at eCFR.
Citations by month
Inspections with citations issued, by month of issuance. Hatched months are incomplete: citations reach the public data about a month after issuance.
Most-cited paragraphs
| Paragraph | What it covers | Items | Inspections | Median initial penalty |
|---|---|---|---|---|
| 1910.304(g)(5) | Grounding of systems and equipment | 184 | 184 | $700 |
| 1910.304(f)(1)(iv) | Overcurrent protection | 22 | 22 | $300 |
| 1910.304(b)(4) | 19 | 19 | $0 | |
| 1910.304(b)(4)(ii)(B) | 19 | 19 | $750 | |
| 1910.304(b)(3)(i) | 18 | 18 | $0 | |
| 1910.304(f)(1)(viii) | Overcurrent protection | 12 | 12 | $225 |
| 1910.304(a)(2) | Grounded and grounding conductors not reversed, maintaining polarity | 9 | 9 | $0 |
| 1910.304(b)(2)(ii) | 7 | 7 | $0 | |
| 1910.304(b)(3)(ii)(C)(3) | 4 | 4 | $0 | |
| 1910.304(g)(6)(vi)(C)(5) | Grounding of systems and equipment | 4 | 4 | $1,625 |
| 1910.304(b)(2)(i) | 2 | 2 | $3,014 | |
| 1910.304(b)(3) | 2 | 2 | $5,794 | |
| 1910.304(b)(3)(ii)(A) | 2 | 2 | $7,034 | |
| 1910.304(g)(6)(vi)(C)(1) | Grounding of systems and equipment | 2 | 2 | $0 |
| 1910.304(a)(3) | 1 | 1 | $0 |
Penalties
Across 314 alleged items, OSHA and state-plan offices proposed $714,489 in initial penalties. The current total in the public data is $529,601, 26% lower after settlements, contests and amendments.
By violation type: Serious 75%; Other-than-serious 24%; Repeat 1%.
Citations by state
| State | Inspections cited | Items | Initial penalties | Current penalties |
|---|---|---|---|---|
| Tennessee | 51 | 53 | $575 | $575 |
| Minnesota | 40 | 40 | $47,050 | $34,105 |
| Nevada | 40 | 40 | $173,909 | $113,947 |
| New York | 25 | 25 | $36,897 | $22,010 |
| Virginia | 20 | 22 | $37,060 | $15,383 |
| Hawaii | 17 | 19 | $105,940 | $90,726 |
| Maryland | 14 | 14 | $11,100 | $9,620 |
| North Carolina | 14 | 14 | $17,550 | $15,067 |
| Oregon | 11 | 12 | $8,031 | $5,966 |
| Puerto Rico | 9 | 9 | $39,733 | $36,753 |
| Connecticut | 8 | 13 | $28,112 | $27,091 |
| Texas | 8 | 8 | $67,668 | $57,325 |
| South Carolina | 7 | 7 | $6,800 | $5,317 |
| New Jersey | 6 | 6 | $30,806 | $24,048 |
| Michigan | 5 | 6 | $1,500 | $750 |
| Iowa | 4 | 4 | $18,324 | $11,290 |
| Illinois | 4 | 4 | $26,293 | $7,661 |
| Arizona | 2 | 2 | $4,220 | $4,220 |
| Massachusetts | 2 | 2 | $6,620 | $6,620 |
| Maine | 2 | 2 | $0 | $0 |
By industry
- Manufacturing: 92 inspections
- Accommodation & food services: 36 inspections
- Public administration: 33 inspections
- Educational services: 21 inspections
- Health care & social assistance: 18 inspections
- Construction: 15 inspections
- Wholesale trade: 14 inspections
- Other services: 13 inspections
Recently cited establishments
About these records. Citations list alleged violations and proposed penalties. Employers can contest them, and many are reduced or withdrawn in settlement. Each row shows the original and the current penalty and a status label derived from the public data as of October 5, 2026. Check the linked osha.gov page for the official record.
| Establishment | Location | Issued | Alleged items | Initial penalty | Current penalty | Status and deadlines | Source |
|---|---|---|---|---|---|---|---|
| Williamsville CSD Facilities Building | Williamsville, NY | Sep 2, 2026 | 1 | $0 | $0 | Final orderAbatement due Sep 15, 2026 | osha.gov |
| Natchaug Hospital, Inc. | Mansfield Center, CT | Sep 2, 2026 | 2 | $12,863 | $12,863 | OpenAbatement due Oct 21, 2026Contest deadline ~Sep 24, 2026 (est.) | osha.gov |
| Soddy Daisy - Public Works | Soddy Daisy, TN | Aug 31, 2026 | 1 | $0 | $0 | Final orderAbatement due Sep 30, 2026 | osha.gov |
| Bradley County - Fire Station 13 | Cleveland, TN | Aug 31, 2026 | 1 | $0 | $0 | Final order | osha.gov |
| Calvert County Public Schools | Prince Frederick, MD | Aug 31, 2026 | 1 | $1,425 | $1,425 | ContestedAbatement due Sep 8, 2026Contested Sep 9, 2026 | osha.gov |
| Board of Education, Frederick County Public Schools | Frederick, MD | Aug 28, 2026 | 1 | $2,100 | $2,100 | Final orderAbatement due Sep 8, 2026 | osha.gov |
| Birdnow Motor Trade of Oelwein | Oelwein, IA | Aug 28, 2026 | 1 | $0 | $0 | Informal settlementAbatement due Sep 24, 2026 | osha.gov |
| Aeko Kula LLC | Honolulu, HI | Aug 28, 2026 | 1 | $16,550 | $16,550 | OpenAbatement due Sep 8, 2026Contest deadline ~Sep 21, 2026 (est.) | osha.gov |
| Brenntag Great Lakes, LLC | Des Moines, IA | Aug 28, 2026 | 1 | $14,068 | $7,034 | Informal settlementAbatement due Sep 24, 2026 | osha.gov |
| Lynbrook Vill DPW | Lynbrook, NY | Aug 28, 2026 | 1 | $0 | $0 | Final orderAbatement due Sep 10, 2026 | osha.gov |
| Knife River Corporation - North Central | Sauk Rapids, MN | Aug 26, 2026 | 1 | $700 | $700 | ContestedAbatement due Sep 8, 2026Contested Sep 1, 2026 | osha.gov |
| Aee | Yauco, PR | Aug 25, 2026 | 1 | $11,823 | $11,823 | ContestedAbatement due Sep 2, 2026Contested Sep 16, 2026 | osha.gov |
| Tithe Corp. | Baltimore, MD | Aug 25, 2026 | 1 | $1,400 | $1,400 | OpenAbatement due Sep 2, 2026Contest deadline ~Sep 16, 2026 (est.) | osha.gov |
| Red Garter Operator, LLC | West Wendover, NV | Aug 24, 2026 | 1 | $0 | $0 | Final orderAbatement due Aug 31, 2026 | osha.gov |
| Eischen Cabinet Company | Hastings, MN | Aug 24, 2026 | 1 | $750 | $750 | ContestedAbatement due Aug 28, 2026Contested Aug 26, 2026 | osha.gov |
| Terranetti Italian Bakery, Inc. | Mechanicsburg, PA | Aug 24, 2026 | 1 | $0 | $0 | OpenAbatement due Sep 8, 2026Contest deadline ~Sep 15, 2026 (est.) | osha.gov |
| Northeast Battery & Alternator, LLC | Gambrills, MD | Aug 21, 2026 | 1 | $0 | $0 | ContestedAbatement due Aug 31, 2026Contested Sep 1, 2026 | osha.gov |
| TZN Group LLC dba Apple Spice Minneapolis | Minneapolis, MN | Aug 21, 2026 | 1 | $200 | $200 | Final orderAbatement due Sep 8, 2026 | osha.gov |
| Harlow's School Bus Service, Inc. | Valley, NE | Aug 20, 2026 | 1 | $0 | $0 | Informal settlementAbatement due Sep 24, 2026 | osha.gov |
| Sawyer Paddles & Oars LLC | Talent, OR | Aug 19, 2026 | 1 | $1,457 | $1,457 | Final orderAbatement due Sep 21, 2026 | osha.gov |
| Middle Country CSD Transportation | Selden, NY | Aug 19, 2026 | 1 | $0 | $0 | Final orderAbatement due Sep 15, 2026 | osha.gov |
| LTS Brewing Company | Rochester, MN | Aug 17, 2026 | 1 | $750 | $450 | Informal settlementAbatement due Aug 21, 2026 | osha.gov |
| J Resort, LLC | Reno, NV | Aug 17, 2026 | 1 | $6,029 | $4,220 | Informal settlementAbatement due Aug 31, 2026 | osha.gov |
| Midwest Fabrication - Supply LLC | Zumbrota, MN | Aug 14, 2026 | 1 | $3,500 | $3,500 | ContestedAbatement due Aug 24, 2026Contested Aug 24, 2026 | osha.gov |
| Alloy Welding and Manufacturing Inc. | Saint Paul, MN | Aug 13, 2026 | 1 | $1,250 | $1,250 | ContestedAbatement due Sep 10, 2026Contested Aug 26, 2026 | osha.gov |
| Nellis Hospitality, LLC | Las Vegas, NV | Aug 12, 2026 | 1 | $2,050 | $1,025 | Informal settlementAbatement due Aug 24, 2026 | osha.gov |
| Gasco Industrial Corp. | Gurabo, PR | Aug 7, 2026 | 1 | $9,931 | $6,951 | Informal settlementAbatement due Sep 2, 2026 | osha.gov |
| Lineage, Inc. | Jessup, MD | Aug 7, 2026 | 1 | $0 | $0 | OpenAbatement due Aug 17, 2026Contest deadline ~Aug 28, 2026 (est.) | osha.gov |
| Harrogate - Maintenance Building | Harrogate, TN | Aug 7, 2026 | 1 | $0 | $0 | Final orderAbatement due Sep 8, 2026 | osha.gov |
| Filter-Fab Corporation | Cookeville, TN | Aug 5, 2026 | 1 | $0 | $0 | Final orderAbatement due Aug 20, 2026 | osha.gov |
| Cumberland County - Health Department | Crossville, TN | Aug 4, 2026 | 1 | $0 | $0 | Final orderAbatement due Sep 3, 2026 | osha.gov |
| Tropical Products Inc. | Salem, MA | Aug 4, 2026 | 1 | $6,620 | $6,620 | Final orderAbatement due Sep 21, 2026 | osha.gov |
| Island Controls Inc. | Honolulu, HI | Aug 3, 2026 | 1 | $4,020 | $2,814 | Informal settlementAbatement due Aug 7, 2026 | osha.gov |
| Wadsworth Atheneum Museum of Art | Hartford, CT | Aug 3, 2026 | 3 | $0 | $0 | Informal settlementAbatement due Sep 18, 2026 | osha.gov |
| Aumakua Holdings LLC | Kihei, HI | Aug 3, 2026 | 1 | $5,627 | $3,658 | Informal settlement | osha.gov |
| MBC Kihei LLC | Kihei, HI | Aug 3, 2026 | 1 | $7,235 | $7,235 | OpenContest deadline ~Aug 24, 2026 (est.) | osha.gov |
| Twin City Seed Company | Minneapolis, MN | Jul 30, 2026 | 1 | $750 | $750 | Final orderAbatement due Aug 3, 2026 | osha.gov |
| Capps Shoe Company, LLC | Gretna, VA | Jul 29, 2026 | 1 | $0 | $0 | Final order | osha.gov |
| Peppermill Casinos, Inc. | Sparks, NV | Jul 29, 2026 | 1 | $2,360 | $2,360 | Final order | osha.gov |
| Hendersonville - Police Department | Hendersonville, TN | Jul 28, 2026 | 1 | $0 | $0 | Final orderAbatement due Aug 27, 2026 | osha.gov |
Often cited together
- 1910.305 Wiring Methods (152 shared inspections)
- 1910.303 Electrical General (147 shared inspections)
- 1910.1200 Hazard Communication (76 shared inspections)
- 1910.157 Fire Extinguishers (53 shared inspections)
- 1910.212 Machine Guarding (51 shared inspections)
- 1910.37 Exit Route Maintenance (43 shared inspections)
- 1910.178 Forklifts (42 shared inspections)
- 1910.147 Lockout/Tagout (33 shared inspections)
Questions
What does OSHA standard 1910.304 require?
Covers the design and protection of electrical wiring, including use and identification of grounded and grounding conductors, correct polarity of connections, branch circuits, outside conductors, overcurrent protection, and system and equipment grounding. Ground-fault circuit-interrupter protection is required for certain receptacles, and grounding paths from circuits and equipment must be permanent, continuous, and effective. Missing ground pins, reversed polarity, and open ground circuits are typical issues.
How often was 1910.304 cited in the last 12 months?
In the public data as of October 5, 2026, 1910.304 (Wiring Design) appeared in 301 inspections with citations issued between Oct 5, 2025 and Oct 5, 2026, covering 314 alleged violation items.
Which part of 1910.304 is cited most?
1910.304(g)(5) was the most-cited paragraph, with 184 items: Grounding of systems and equipment
Which states cite 1910.304 most often?
The most citations under 1910.304 in this period were issued in Tennessee, Minnesota, Nevada.
What is the typical penalty for a 1910.304 violation?
The median initial (proposed) penalty per item was $175; the median current penalty after settlements and amendments was $0. Totals: $714,489 proposed, $529,601 current. Penalties vary by violation type, employer size and history, and State Plans set their own amounts.
Are 1910.304 citations final?
Not necessarily. A citation is an allegation until it becomes a final order. 9% of these items were contested, and many others were changed in settlements. Each listing shows its current status and a link to the official record.