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Electrical
Damaged Extension Cords Cause Shocks, Fires, and Falls
Catch the frayed cord before it energizes the job
Flexible extension cords are the most common source of electrical trouble on a job site because they take the most abuse. A cord with a missing ground pin, cut insulation, or a spliced repair can shock a worker, ignite a fire, or trip a passing crew. OSHA Scan analyzes job-site photos to flag damaged, overloaded, and improperly routed extension cords before they become the cause of an injury.
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AI analysis preview
1
Hazard detectedSample report
1CriticalExtension Cord Hazard
May relate to 29 CFR 1926.405
3,300
US home and jobsite cord fires a year
~50
Electrocution deaths a year involve cords
#1
Cause of struck/trip-and-fall on many sites
~15s
Typical time to get scan results
What this scenario looks like
An extension cord hazard is any use of a flexible cord that is damaged, overloaded, misapplied, or routed in a way that creates a shock, fire, or tripping risk. It shows up as a cord with cracked or cut insulation, a missing or bent ground prong, a taped splice, or a light-duty household cord powering heavy tools far beyond its rating.
In practice, these hazards appear when cords are run through doorways and pinched, stapled or nailed to walls, chained together in long daisy chains, or dragged across sharp metal edges. Cords laid across walkways, buried under debris, or run through standing water combine trip, fire, and shock risks at once, and connections left in the open collect moisture and dust.
The danger is that a cord looks fine until the moment it fails: the ground path is invisible, and a nicked conductor can energize the cord jacket or a tool housing without warning. A cord that overheats inside a coiled bundle can smolder for a long time before igniting, which is why photo-based inspection of cords and their routing matters before power flows.
A labelled example scan for this scenario
Here is what an OSHA Scan report looks like for extension cord hazard. It is an illustrative example built from this scenario's hazards — clearly marked, not live scan data.
Example report
Illustrative — not live scan dataCompliance score
40
Lower means more potential hazards found
3 potential hazards found
1 Critical1 High1 Medium
Extension Cord Hazard
CriticalPossibly related to Wiring methods, components, and equipment for general use (29 CFR 1926.405)
Observed condition: An extension cord hazard is any use of a flexible cord that is damaged, overloaded, misapplied, or routed in a way that creates a shock, fire, or tripping risk.
Corrective action: Use only heavy-duty, three-wire cords rated for the tool load and jobsite use
High confidence
Extension Cord Hazard: Wiring design and protection
HighPossibly related to Wiring design and protection (29 CFR 1926.404)
Observed condition: Requires ground-fault circuit interrupter protection or an assured equipment grounding conductor program for cord-connected equipment and receptacles used by employees.
Corrective action: Add GFCI protection at the receptacle or with in-line GFCI cords
Medium confidenceNot fully clear from the photo — verify on site.
Extension Cord Hazard: General requirements for electrical equipment
MediumPossibly related to General requirements for electrical equipment (29 CFR 1926.403)
Observed condition: Requires electrical equipment to be free from recognized hazards, listed or labeled for its use, and installed and used in accordance with its listing and instructions.
Corrective action: Route cords overhead or along walls, off walkways and out of water
High confidence
AI-generated analysisThese findings are potential hazards flagged by AI from a single photo. They are a starting point for your own review — not an official OSHA determination. Verify conditions on site with a qualified person before acting.
Why this scenario matters
Immediate consequences
A damaged cord can electrocute the worker holding a tool, start a fire in seconds when it overheats, or trip a coworker into machinery or off an elevation. All three can happen without warning.
Legal & financial impact
Flexible cord requirements under 29 CFR 1926.405 are among the most frequently cited electrical rules. A serious violation exceeds $16,000, and willful or repeat findings can surpass $165,000 per instance.
Operational impact
A cord-related fire or shock halts work, triggers an OSHA inspection, and forces removal of noncompliant cords across the site. Property damage and higher insurance premiums follow.
Industry-specific concerns
Every trade relies on temporary power, but carpenters, painters, drywall, and finishing crews run cords constantly through tight, high-traffic spaces where damage and daisy-chaining are common.
How OSHA Scan detects this hazard
OSHA Scan uses an AI vision model to flag unsafe extension cords. Upload a photo of the work area and it identifies cords with damaged insulation or missing ground pins, spots daisy chains and cords run through doorways or across walkways, checks for GFCI protection, and returns a severity rating with the OSHA standard it may relate to in seconds.
Analyze your first photo freeScanning
1
Hazard found
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Scan a photo for extension cord hazard now
Upload a real job-site photo and OSHA Scan detects visible hazards in seconds — no account needed to run your first scan.
- Visible cord faults flagged — cut insulation, missing ground pins, daisy chains
- 29 CFR 1926.405 cited per unsafe cord or routing the frame may relate to
- A scored, dated cord-safety report you can save and export as PDF or Excel
Live OSHA hazard analysis
Free instant AI scanPhoto scan — no account neededVideo walkthrough scan — free account
1Upload photo
2AI analysis
3See report
Use the real site or facility name. If you save the scan after signup, it becomes the report name.
Three angles, one deeper scan
Only the wide shot is required — every extra angle gives the AI more places to look.
Required: Set the scene — one wide shot lets the AI sweep the whole area at once
Stand at the entry point and capture corner to corner: floors, ladders, scaffolds, and everyone at work
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Drop a job-site photo or walkthrough video
Click to upload, drag & drop, or snap a photo on site. Photos scan free in about 15 seconds — no signup, no card. Video walkthroughs (up to 3 min) run on a free account.
Results in ~15sReferences relevant OSHA standardsPrivate - deleted in 48h unless you save it
Accuracy boosters
Small habits, sharper scans
2
Capture clearly
Make the frame usable
Light it right
Keep the sun or lights behind you — glare and shadows hide hazards.
Tap to focus
Tap the hazard on screen and hold still one second — blur can't be flagged.
3
Choose the useful view
Give the AI room to understand
Go landscape
Turn your phone sideways — a wider frame catches more of the scene.
No job-site photo handy?
or scan with video
Only upload photos you have permission to use, and avoid images showing personal, customer, or confidential information. Demo photos and results are held privately for up to 48 hours so you can save them to a free account; unclaimed photos are deleted automatically. Results are an AI-assisted preliminary review, not an official OSHA determination.
New: Video walkthrough scans
Record up to 3 minutes of your site — the AI extracts frames and flags every hazard with exact timestamps. Free account required.
Get the best results
Wide shot first
Stand at the entrance and photograph the entire work area so AI sees the full context
Hazard areas
Photograph elevated surfaces, equipment, electrical panels, and anywhere workers are active
Close-ups last
Move in close on anything damaged, missing, or that looks risky — the AI catches more detail
Real incident case study
A spliced cord run across a wet walkway
The situation
To reach a far corner of a remodel, a crew joined two extension cords and repaired a cut in one jacket with electrical tape. The taped splice was left lying across a walkway that a mop crew had just cleaned, leaving the floor damp.
What went wrong
A worker pushing a loaded cart caught a wheel on the cord, tore the taped splice open, and exposed the energized conductors on the wet floor. When a coworker reached to move the cord, current flowed through his hand and he received a severe shock and a fall as he recoiled.
How OSHA Scan would have prevented it
A photo of the walkway run through OSHA Scan would have flagged the taped splice, the cord routed across a walkway, and the damp surface, cited 29 CFR 1926.405, and prompted the crew to replace the damaged cord, add GFCI protection, and route power overhead or along the wall.
Lessons learned
Taped splices and cords across walkways are recurring failures. Damaged cords must be removed from service, never repaired with tape, and cords should be routed overhead or protected and out of traffic and water.
Prevention best practices
Layered controls, from most to least effective.
Engineering controls
Provide and route cords so they cannot be damaged, overloaded, or create trip hazards.
- Use only heavy-duty, three-wire cords rated for the tool load and jobsite use
- Add GFCI protection at the receptacle or with in-line GFCI cords
- Route cords overhead or along walls, off walkways and out of water
- Protect cords crossing traffic areas with rated cord ramps or covers
Administrative controls
Inspect, tag, and control cords so damaged ones never stay in service.
- Inspect every cord before use and remove damaged cords from service
- Prohibit taped splices, daisy chains, and cords run through doorways
- Match cord gauge and length to the tool's amperage draw
- Implement an assured equipment grounding conductor or GFCI program
- Tag and quarantine damaged cords so they cannot be reused
Personal protective equipment
Protect workers who handle and connect flexible cords on site.
- Insulated gloves when handling cords in damp or energized conditions
- Slip-resistant footwear to reduce trip-and-fall risk around cords
- Dielectric footwear where wet-location cord use is unavoidable
- Inspect gloves and footwear before each use and replace damaged gear
OSHA compliance & citations
The federal standards this hazard may relate to.
29 CFR 1926.405
Wiring methods, components, and equipment for general use
Governs the use of flexible cords, prohibiting damaged cords, improper splices, and use as fixed wiring, and requiring cords to be protected from damage and suitable for the conditions.
Up to $16,550 per serious violation; $165,514 for willful or repeat
29 CFR 1926.404
Wiring design and protection
Requires ground-fault circuit interrupter protection or an assured equipment grounding conductor program for cord-connected equipment and receptacles used by employees.
Up to $16,550 per serious violation
29 CFR 1926.403
General requirements for electrical equipment
Requires electrical equipment to be free from recognized hazards, listed or labeled for its use, and installed and used in accordance with its listing and instructions.
Up to $16,550 per serious violation
Incident response protocol
If an incident occurs, act fast and in order.
Immediate actions (first 5 minutes)
- 1Call 911 for any shock, burn, or fire that cannot be safely controlled
- 2Deenergize the affected circuit at the breaker before touching the cord
- 3Do not touch a shocked worker or damaged cord until power is off
- 4Use a proper extinguisher on a small electrical fire only if trained
- 5Assign someone to direct emergency responders to the exact location
Emergency response (5-30 minutes)
- 1Cooperate fully with arriving emergency responders
- 2Confirm the circuit remains deenergized and the cord is isolated
- 3Provide first aid or CPR once the area is confirmed safe and if trained
- 4Account for all workers and stop nearby cord-powered work
- 5Document the cord, connections, and scene with photos once safe
Post-incident
- 1Notify OSHA within 8 hours for a fatality, or 24 hours for a hospitalization
- 2Launch an incident investigation within 24 hours
- 3Preserve the damaged cord, tools, and all documentation
- 4Interview witnesses and the affected worker while details are fresh
- 5Revise temporary-power and cord-use procedures and retrain the crew
Team training module
Workers will understand how damaged and misused extension cords cause shocks, fires, and falls, recognize unsafe cords, and select, route, and inspect cords correctly before use.
Train workers before assigning cord-powered tools, refresh annually, and reinforce with toolbox talks using real photos of damaged and correctly routed cords.
Training topics
- How cord damage causes shock, fire, and trip hazards
- Identifying damaged insulation, missing ground pins, and bad splices
- Selecting cord gauge and length for the tool load
- Prohibited practices: taped repairs, daisy chains, and fixed wiring
- Safe routing overhead, along walls, and out of water
- GFCI protection and the assured equipment grounding program
- Protecting cords that must cross traffic areas
- Inspecting, tagging, and removing damaged cords from service
- Emergency response for cord fires and shocks
- OSHA requirements and penalties for flexible cord use
Compliance checklist
Run these checks to stay ahead of citations.
Daily pre-work inspection
- All cords inspected for cut, cracked, or damaged insulation
- Ground pins present and intact on every cord and plug
- No taped splices or field repairs in service
- Cord gauge and length matched to the tool load
- GFCI protection in place on cord-connected equipment
- Cords routed overhead or along walls, off walkways
- Cords kept out of standing water and pinch points
- Damaged cords tagged and removed from service
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Frequently asked questions
Can a damaged extension cord be repaired with tape?
No. Electrical tape does not restore a cord's insulation or strain relief and is prohibited for repairing cut or cracked cords. A damaged cord must be removed from service and replaced or professionally repaired with rated components.
Why is a missing ground pin so dangerous?
The ground pin gives a fault current a safe path back to ground instead of through a worker. Without it, a fault can energize the tool housing or cord jacket, and the first person to touch the tool completes the circuit and is shocked.
Can extension cords be daisy-chained together?
Chaining cords together increases voltage drop, overheating, and connection failures, and is not permitted for jobsite use. Use a single cord of the correct gauge and length, or provide additional receptacles and temporary power closer to the work.
How do I choose the right cord for a tool?
Match the cord's wire gauge and length to the tool's amperage draw; heavier tools and longer runs need thicker gauge to avoid voltage drop and overheating. Always use a three-wire, heavy-duty cord rated for jobsite conditions.
Do extension cords need GFCI protection?
Cord-connected equipment used by employees on construction sites must be covered by GFCI protection or an assured equipment grounding conductor program under 29 CFR 1926.404. In-line GFCI cords or GFCI-protected receptacles satisfy this in most cases.
Why can't cords be run through doorways or under rugs?
Cords pinched in doorways or hidden under coverings can be crushed, cut, or overheat without anyone noticing, creating shock and fire hazards. Route cords overhead or along walls, protected and out of traffic and pinch points.
What are the OSHA penalties for extension cord violations?
A serious violation of 29 CFR 1926.405 can exceed $16,000, and willful or repeat violations can surpass $165,000 per instance. Cord-related fires or electrocutions can also trigger further liability and litigation.
How accurate is OSHA Scan at detecting extension cord hazards?
OSHA Scan flags extension cord hazards. It detects damaged insulation, missing ground pins, daisy chains, and unsafe routing, and returns the location and the OSHA citation it may relate to.
Catch the failing cord before it fails you
Analyze a photo
Upload a photo of your work area to get instant feedback on damaged, overloaded, or unsafely routed cords in your exact environment.
Get startedGet the cord safety checklist
Put our expert extension cord inspection checklist to work on your next job to stay ahead of citations.
Get startedTalk to our team
See how OSHA Scan fits your temporary-power setup and get recommendations for safe cord use on your sites.
Get startedJoin safety-first contractors
See how other crews use OSHA Scan to prevent cord-related shocks, fires, and falls before they happen.
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What the AI can and can't detect
OSHA Scan reads a single photo. That makes it fast and easy for anyone on site — but it also means it has real limits. Here's an honest look at both.
What it can catch from a photo
- Missing or incorrect PPE that is visible in the frame
- Unprotected edges, open holes, and visible fall hazards
- Housekeeping, trip, and blocked walkway or exit hazards
- Visible electrical, struck-by, and equipment-guarding hazards
What a photo can't tell it
- Hazards hidden from view or anything outside the photo
- Exact heights, distances, weights, or measurements
- Training records, procedures, or how equipment is actually used
- Full legal compliance or an official OSHA pass/fail determination
OSHA Scan gives an AI-assisted preliminary review from a photo. It does not replace an on-site inspection by a qualified safety professional, and a compliance score is not an official OSHA determination.
Reviewed by OSHA Scan Editorial
Last updated August 29, 2026
This content is produced by the OSHA Scan Editorial team and reviewed with AI assistance. It is general safety information, not legal or compliance advice. OSHA Scan is an independent tool and is not affiliated with, endorsed by, or certified by OSHA or the U.S. Department of Labor.
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