Electrical Safety at Work: What OSHA Requires — and What Most Small Businesses Miss

Electricity powers nearly every business in America, and it kills about 150 workers a year doing it. Electrical hazards — arc flash, shock, electrocution, fire — rank among OSHA's most consistently cited violations, yet many small business owners assume that if they've hired a licensed electrician at some point, their obligations are met. They are not.

OSHA's electrical safety standards for general industry (29 CFR 1910.303 through 1910.335) cover far more than how the wiring in your walls was installed. They govern how your workers interact with electrical equipment every single day, and the gap between a properly wired building and a compliant workplace can be significant — and expensive to discover during an inspection.

The Basics: What 29 CFR 1910.303–308 Actually Covers

The foundation of OSHA's electrical safety requirements deals with equipment design and installation. Under 1910.303, equipment must be free from recognized hazards and installed in a way that doesn't expose workers to danger. This sounds straightforward, but in practice it means a few things that often get overlooked in small businesses.

First, electrical equipment must be approved — meaning listed or labeled by a nationally recognized testing laboratory (NRTL) such as UL, CSA, or ETL. Bringing in uncertified equipment from overseas sources, or modifying equipment in ways that void its listing, puts you in violation. Second, conductors and equipment must be guarded. Exposed energized parts operating at 50 volts or above must be guarded by location, barriers, or enclosures. If your panel box is missing its dead-front cover, or if someone taped cardboard over an open junction box "temporarily," that temporary fix is now an OSHA citation waiting to happen.

Under 1910.305, specific wiring methods apply to different settings. Extension cords get particular scrutiny — they are intended as temporary measures, not permanent wiring substitutes. OSHA has cited employers for using extension cords in place of permanent wiring, for daisy-chaining power strips, and for running cords through walls or doorways where they become a tripping hazard and a fire risk. If you have extension cords that have been in the same place for six months, they are permanent wiring by any practical definition, and an inspector will view them that way.

Hazardous Energy and Lockout/Tagout

The most frequently cited electrical standard in small businesses is not in the 1910.303–335 subpart at all — it is 1910.147, the Control of Hazardous Energy standard, which directly intersects with electrical safety every time a worker services, maintains, or cleans equipment with an electrical power source.

Lockout/tagout (LOTO) requires that before any servicing or maintenance where unexpected energization could cause injury, the energy source must be isolated and physically locked out. The standard requires a written energy control program, authorized employee training, and documented periodic inspections of each procedure. Yet OSHA consistently finds that many small businesses either have no written LOTO program or have one that was written once, filed somewhere, and never updated as equipment changed.

The consequence of a gap here is not abstract. A worker who reaches into a machine to clear a jam while power is on — even for a moment, even something they have done a hundred times — can lose fingers, a hand, or their life. OSHA's standard exists because human judgment is not a reliable energy control. A physical lock is.

Working Near Energized Parts: 1910.333 and Qualified Workers

Section 1910.333 governs safety-related work practices — the rules that apply when workers must work on or near exposed energized parts. The standard makes a critical distinction between qualified and unqualified workers. A qualified worker is one who has received training in and demonstrated skills related to construction and operation of electrical equipment and the hazards involved. An unqualified worker must maintain specific approach distances from energized parts and may not perform electrical work.

This distinction matters practically when, for example, your maintenance staff resets breakers, replaces fuses, or troubleshoots equipment. If those workers have not received formal electrical safety training documented in your records, OSHA may classify them as unqualified — which means any work they performed near energized conductors was a violation, regardless of outcome.

For work on circuits above 50 volts, 1910.333 also requires the use of appropriate PPE, insulated tools, and in many cases, an energized electrical work permit. This last requirement surprises many small businesses. If any electrical work is done on live circuits (rather than de-energizing them per LOTO procedures), OSHA expects a formal authorization process, including a hazard assessment, justification for why de-energizing is infeasible, and specific PPE requirements — often defined by reference to NFPA 70E, the National Fire Protection Association's standard on electrical safety in the workplace.

What Practical Compliance Looks Like

For a small business owner, getting electrical safety right comes down to a handful of concrete actions. Start by walking your facility and looking at every extension cord, every panel box, every piece of equipment with an electrical cabinet. Document what you find. If panel covers are missing, replace them. If extension cords are serving permanent needs, schedule an electrician to install proper outlets.

Next, identify every piece of equipment where maintenance or servicing occurs. For each one, a lockout/tagout procedure should exist that names the energy isolation points, describes the lock-out sequence, and lists required PPE. These procedures must be reviewed at least annually, and that review must be documented.

Finally, define who in your organization is a "qualified electrical worker" under 1910.333. For most small businesses, that number is small — possibly just one or two people, or possibly nobody in-house. If you have maintenance staff who regularly work near electrical equipment, invest in formal electrical safety training and document it. That documentation is what stands between you and a serious citation when an inspector shows up after a complaint.

OSHA's electrical standards are not written for electricians. They are written for every employer whose workers interact with electrical equipment — which is effectively everyone. The standards are detailed, but the compliance path is not complicated. It requires attention, documentation, and the recognition that a wired building is not the same as a safe one.