Lithapo tsa motlakase tse theotsoeng koloing ea hau le monyetla oa ho hata¶

When a live overhead utility wire drops onto your motor vehicle or touches the ground nearby after a crash, storm, or pole impact, the metal shell of your car and the surrounding roadway become charged with thousands of volts of lethal electricity. Stepping out of the vehicle normally creates an instant bridge for high-voltage electrical current to flow through your body into the earth, causing immediate fatal electrocution. Even after you are clear of the car, walking normally across energized pavement can send thousands of volts surging up one leg and down the other through a phenomenon called step potential.

Unless your vehicle is actively on fire, the safest place in the world during a downed power line emergency is sitting still inside the passenger cabin until utility crews shut off the power grid. This guide provides immediate survival actions, explains the physics of Faraday cages, touch potential, and step potential, details the exact jump-and-shuffle fire evacuation sequence, and covers electric vehicle and heavy equipment protocols based on guidance from the Occupational Safety and Health Administration (OSHA) and the Federal Emergency Management Agency (FEMA) in the United States, the Health and Safety Executive (HSE) in the United Kingdom, and international electrical safety standards.

Etsa sena hona joale¶

1. Stay inside your vehicle and keep your hands in your lap. Keep your seatbelt fastened or stay seated in the center of your seat. Do not touch any interior metal door frames, window pillars, metal latches, or exterior body panels.
2. Never step out of the vehicle normally. Touching any part of the car while your foot touches the ground creates touch potential, completing a high-voltage circuit straight through your heart into the earth.
3. Call your local emergency number immediately from inside the cabin. Dial 911 in the United States and Canada, 112 across the European Union, 999 in the United Kingdom, 000 in Australia, or consult the directory of dinomoro tsa tshohanyetso. Tell the dispatcher explicitly: "A downed power line is on or near my vehicle at [exact location]," so the electric utility company can de-energize and ground the circuit.
4. Warn approaching bystanders and first responders to stay far back. Honk your horn repeatedly and shout through a slightly cracked window to warn anyone walking toward your car to stop immediately and stay at least 10 to 15 meters (33 to 50 feet) away from the vehicle, the pole, and any sagging or fallen wires (and at least 30 to 50 meters [100 to 165 feet] away from high-voltage transmission towers).
5. Wait inside until electric utility crews confirm the line is dead and grounded. Do not attempt to exit the car just because the wire stopped sparking, and do not step out until utility linemen or firefighters physically verify that the line is de-energized and tell you it is safe.
6. Jump clear with both feet together and shuffle away ONLY if the car catches fire. If flames, heavy smoke, or leaking fuel force you to abandon the vehicle, push the door fully open using the plastic interior handle without touching outer metal, stand on the dry rubber floor or plastic sill, fold your arms tightly across your chest, jump completely clear so both feet land on the ground at the exact same instant without touching the car, and shuffle both feet pressed together for at least 15 meters (50 feet).

Downed power line and vehicle fire decision tree¶

flowchart TD
    Root["Downed Power Line on Vehicle, Across Roadway, or Near Crash Scene"]
    Where{"Are you inside the vehicle or an outside bystander?"}

    Outside["OUTSIDE BYSTANDER / APPROACHING DRIVER<br/>1. Stop at least 15 meters (50 feet) back; 30+ m (100+ ft) for transmission lines<br/>2. Never drive over a downed wire or touch metal guardrails/fences<br/>3. Shout to trapped occupants to STAY INSIDE their car<br/>4. Call 911 / 112 / 999 and request emergency utility dispatch"]

    Inside["INSIDE THE TRAPPED VEHICLE"]
    FireCheck{"Is the vehicle actively on fire, filling with smoke,<br/>or showing EV battery thermal runaway?"}

    SafeStay["NO FIRE: STAY INSIDE THE FARADAY CABIN<br/>1. Do NOT step out and do NOT try to drive away if tangled<br/>2. Keep hands in lap away from metal door frames and pillars<br/>3. Call 911 / 112 / 999 to report live wire on vehicle<br/>4. Honk horn and warn bystanders back 15 meters (50 feet)<br/>5. Wait until utility crew grounds the line and clears you"]

    FireEvac["ACTIVE FIRE: EMERGENCY JUMP-AND-SHUFFLE EVACUATION<br/>1. Push door wide open using plastic handle; do NOT touch outer metal<br/>2. Stand on interior plastic/rubber threshold and spot clear landing area<br/>3. Cross arms tightly over chest (hold small child/pet tightly to chest)<br/>4. JUMP completely clear with both feet together (never bridge car & ground)<br/>5. Land on BOTH feet simultaneously with knees slightly bent<br/>6. SHUFFLE both feet pressed together (slide soles 5 cm at a time)<br/>for at least 15 meters (50 feet) before walking normally"]

    Root --> Where
    Where -->|Outside Bystander| Outside
    Where -->|Inside Vehicle| Inside
    Inside --> FireCheck
    FireCheck -->|No Fire| SafeStay
    FireCheck -->|Yes: Fire or Smoke| FireEvac

Fisiks ea ho pholoha: hobaneng ho lula kahare ho u boloka u phela¶

Understanding how high-voltage electricity behaves when a wire contacts a car and the earth explains why stepping out normally kills instantly, and why you must change how your feet move if forced to escape a fire.

1. The Faraday cage effect vs the rubber tire myth¶

Tšōmo e atileng ea sechaba e bolela hore koloi e sireletsehile nakong ea lehalima kapa mohala oa motlakase o theohile hobane lithaere tsa eona tsa rabara li sireletsa koloi fatše. Ha ho sebetsanoa le lithapo tsa motlakase tse nang le matla a phahameng, tšōmo ea mabili a rabara ke leshano ebile e kotsi: - Standard passenger car tires are manufactured with carbon black (for tread durability) and internal steel belts, making them partially conductive at high voltages. - When a 7,200-volt to 34,500-volt distribution line falls onto a car roof or hood, the voltage easily arcs straight through or across the wet sidewall of the rubber tires into the road, or superheats the tires until they catch fire and explode, dropping the steel wheel rims directly onto the pavement. - What actually protects you inside the car is the Faraday cage principle (equipotential bonding): electricity flows along the outside of the conductive steel or aluminum vehicle frame toward the earth. As long as you sit completely inside the cabin without touching the outside ground, every part of your body is at the exact same electrical potential (voltage) as the interior cabin around you. Just like a bird sitting safely on a 13,800-volt overhead wire with both feet on the same cable, zero electrical current flows through your body when there is zero voltage difference (potential difference) across your tissues.

2. Touch potential: why stepping out of the car is fatal¶

The instant you open the car door and place one foot on the asphalt while your hand, hip, or other leg is still touching the metal door frame or rocker panel, you destroy your equipotential protection and create Touch Potential: - Your hand touching the vehicle chassis is at full line voltage (for example, 13,800 volts). - Your foot resting on the pavement 0.6 meters (2 feet) away is at a much lower ground voltage (for example, 8,000 volts). - According to Ohm's Law (\(I = V / R\)), that 5,800-volt difference across a wet human body resistance of roughly 1,000 ohms drives nearly 6 amperes of alternating current directly through your arm, across your chest and heart, and out your leg into the ground. Considering that just 0.05 to 0.1 amperes (50 to 100 milliamperes) of 50/60 Hz alternating current is enough to trigger fatal ventricular fibrillation, bridging the car and the ground causes instantaneous cardiac arrest and severe internal thermal burns.

3. Voltage gradients and step potential ("The Ripple Effect")¶

Even if you successfully jump clear of the car without touching it, the ground itself around the car and the downed wire is a lethal electrical minefield.

When a live wire or energized car frame injects electricity into the earth, the soil, concrete, or asphalt does not conduct electricity as easily as copper wire. Because the earth has high electrical resistance, the voltage drops gradually with every meter of distance away from the point of contact, forming invisible concentric rings of decreasing voltage radiating outward across the ground like ripples around a stone dropped into a pond:

• At the wire or car contact point: 13,800 volts
• At 1 meter (3.3 feet) away: ~9,500 volts
• At 2 meters (6.6 feet) away: ~6,800 volts
• At 3 meters (10 feet) away: ~4,900 volts
• At 6 meters (20 feet) away: ~2,100 volts
• At 10 to 15 meters (33 to 50 feet) away: Approaches 0 volts (depending on voltage and soil moisture)

Now imagine what happens if you jump clear of the car at the 1-meter ring and then take a normal 0.8-meter (2.5-foot) walking or running stride toward safety: - Your back foot is standing on the 1-meter ring at 9,500 volts. - Your front foot steps down onto the 1.8-meter ring at 7,200 volts. - Because your legs and blood vessels are filled with salty, conductive electrolyte fluid that has far lower electrical resistance than dry asphalt or dirt, the 2,300-volt difference between your two feet (Step Potential) takes the path of least resistance: electricity shoots straight up your back leg, through your groin and abdomen, and down your front leg. - That shock instantly locks your leg muscles in tetanic spasm (muscular freeze), knocking you flat on your stomach or hands and knees across the pavement, where your hands and feet now span 2 meters (6.6 feet) of voltage rings across your heart, electrocuting you on the spot.

How to execute the emergency jump-and-shuffle if the car catches fire¶

High-voltage current flowing through a car chassis into the tires rapidly heats the rubber and wheel bearings, often causing the tires to smoke, catch fire, and rupture with loud bangs within minutes. Note that smoking or popping tires alone do not always mean the passenger cabin is on fire. However, if flames enter the wheel wells, heavy dark smoke fills the passenger cabin, or gasoline / EV battery vapor ignites, you must evacuate immediately using the Jump-and-Shuffle Technique.

Step-by-step fire evacuation protocol¶

1. ** Theolla 'me u hlahlobe sebaka seo u lumetseng ho sona pele u bula lemati:** Sheba lifensetere tsa mahlakoreng ka bobeli pele. Hlalosa hore na ke lehlakore lefe la koloi le hole haholo le terata e theohileng, palo ea thuso e robehileng, lithako tsa metsi a emeng, kapa litšepe tsa litsela tse kholo. Haeba lemati la mokhanni le kentsoe terata, hloella ka har'a setsi sa bohareng ho tsoa ka lemati la bapalami.
2. Push the door wide open using only plastic trim: Pull the interior plastic door latch and push the door all the way open against its hinge stop using the plastic interior armrest or panel. Never wrap your fingers around the painted metal edge of the door or the metal B-pillar.
3. Ema u leka-lekana moeling oa ka hare: Ema holim'a 'mete oa fatše o ommeng oa rabara kapa poleiti ea scuff ea polasetiki e siling ea lemati. Bokella mehatla efe kapa efe ea jase e hlephileng, lituku, likhoele tsa mokotla, kapa liaparo tse telele e le hore ho se be letho le tla u latela, 'me u be u borashe holim'a tšepe ea rocker ha u ntse u qhoma.
4. ** Koahela matsoho a hao ka thata sefubeng:** Arolela matsoho ka bobeli ka thata holim'a sefubeng sa hao 'me u tšoare mahetla a hao a fapaneng (kapa u khomarele likhopo tsa hau ka thata). Ha batho ba qhomela pele, boikutlo ba bona ba tlhaho ke ho lahlela matsoho morao bakeng sa ho leka-lekana, ho tšela matsoho ho thibela letsoho la hao ho otla ka phoso lemati la koloi ea tšepe ka mor'a hao ha maoto a hao a otla tsela e katiloeng.
5. Tlolela ka ho hlaka ka maoto a mabeli hammoho: Tsoela ka ntle hole le koloi e le hore 'mele oohle oa hao o be moeeng ka ho feletseng pele maoto a hao a ama tsela. Tsepamisa maikutlo ho ** ho leka-lekana le ho hlakola (limithara tse 0.5 ho isa ho tse 1 / 2 ho isa ho 3 maoto ho tsoa)** ho e-na le ho leka ho beha tlaleho ea nako e telele, e etsang hore batho ba thelle le ho oela ka morao koloing.
6. Land on BOTH feet at the exact same instant: Keep your ankles and knees pressed side-by-side and bend your knees slightly like shock absorbers as the soles of both shoes hit the pavement simultaneously. Because both feet land in the exact same voltage ring at the exact same microsecond, there is zero voltage difference between your legs. (If you feel yourself losing balance on landing, curl into a ball and fall forward away from the car, never backward toward the vehicle.)
7. Sheba (kapa hop) ka maoto ka bobeli a hatisitsoeng hammoho bonyane limithara tse 15 (maoto a 50):
8. The Shuffle (Recommended on pavement, gravel, ice, or uneven ground): Keep the insides of both shoes pressed tightly against each other so your feet never separate by more than a few centimeters. Slide one foot forward just 5 to 8 centimeters (2 to 3 inches) without lifting the sole off the ground, then slide the other foot up to meet it, moving like a penguin. Keeping your soles sliding on the ground with your ankles touching guarantees that both feet remain at the same voltage potential while giving you stable two-foot balance so you cannot trip and fall.
9. The Two-Foot Bunny Hop (Alternative): Hop forward with both feet locked tightly together so both shoes leave the ground and land together at the exact same time. Never hop on one foot (if you lose balance on one foot, your other foot or hand will slam down a meter away across a deadly voltage gradient).
10. Continue shuffling until you are at least 15 meters (50 feet) away from a neighborhood distribution line (or 30 to 50 meters [100 to 165 feet] away from a high-voltage transmission line).

Evacuating with infants, small children, or pets¶

If a vehicle fire forces you to evacuate with a baby, toddler, or dog inside the car: - Infants and small children you can carry: Unbuckle the child from their car seat inside the cabin. Do not carry the heavy plastic car seat carrier out of the car (which makes it nearly impossible to jump and land balanced on two feet without falling). Hold the child tightly against the center of your chest with both arms, stand on the threshold, jump clear together as a single unit, land on both feet, and shuffle 15 meters (50 feet) away while holding the child off the ground. - Older children: Instruct the child carefully before opening the door. Have the child cross their arms, jump clear on both feet, and shuffle away first while you watch from inside the cabin, and then follow them along the exact same path. - Dogs and pets: Never let a dog jump out of the car on a leash or walk across the ground near a downed power line, because a four-legged animal front paws and back paws are separated by 0.5 to 1 meter (1.5 to 3 feet) and their bare paw pads are moist, dogs are electrocuted almost instantly by step potential. Pick small or medium dogs up in your arms and jump and shuffle with them; if a large dog cannot be lifted, keep them inside until the fire department and utility crew de-energize the line.

Comparing power line classes, voltages, and safety perimeters¶

Not all overhead wires carry the same voltage or require the same evacuation radius. Use this reference table to identify the line type and set the correct safety perimeter:

Special vehicle scenarios: EVs, convertibles, motorcycles, and heavy trucks¶

Different vehicle designs alter how electricity flows through the chassis and what secondary hazards you must watch for:

Five deadly scene hazards that trap rescuers and bystanders¶

Every year, well-meaning Samaritans, tow-truck operators, and even first responders are killed at downed-wire crash scenes because they overlook five invisible electrical hazards:

1. Automatic circuit reclosers (The "Dead Wire" Ambush): Most overhead distribution faults are caused by temporary tree branches brushing the wires in the wind. To prevent neighborhood-wide blackouts from minor tree taps, utility substations use automated high-voltage circuit breakers called reclosers. When a wire falls and shorts out on a car or road, the recloser trips the power off for a few seconds, making the wire stop sparking and go completely quiet, and then automatically slams 13,800 volts back down the line 2, 3, or 4 times in a row over several minutes (or until a fuse blows or a technician opens the switch). Never approach a wire just because the sparks stopped.
2. Energized highway guardrails and chain-link fences: Steel W-beam highway guardrails, cable barriers, railroad tracks, and metal chain-link or barbed-wire fences are continuous metallic conductors stretching for hundreds of meters (yards). If a downed power line falls across a metal guardrail 200 meters (650 feet) down the road out of your sight, leaning against or climbing over that guardrail at your crash site will electrocute you instantly. Never touch any fence or guardrail near a damaged utility pole.
3. Wet asphalt, puddles, and storm gutters: Water mixed with road salt and dirt conducts electricity across pavement and down roadside ditches. Never walk through standing water or wet grass near a downed line.
4. The "wooden broomstick or rope" rescue myth: Never attempt to push or lift a downed utility wire off a car or an unconscious victim using a wooden broomstick, a wooden 2x4 board, a tree branch, a PVC pipe, or a nylon rope. Those household advice rules apply only to 120-volt indoor household appliances. At 7,200 to 34,500 volts outdoors, high-voltage electricity travels straight through microscopic moisture, sap, and surface dirt on wood, plastic, or rope, turning the broomstick into a deadly conductor and killing the rescuer instantly. Only utility linemen using laboratory-tested, fiberglass hot sticks rated for 100,000+ volts and wearing high-voltage dielectric rubber gloves and boots can move a utility line.
5. Invisible wire camouflage on night asphalt: After a storm or nighttime crash, dark aluminum and weather-coated copper wires lying flat on black wet asphalt are completely invisible in low-beam headlights. If you see a snapped utility pole, transformer sparks in the distance, or a car crashed into a roadside pole at night, stop your vehicle at least 15 to 30 meters (50 to 100 feet) back and scan the overhead pole spans with your high beams before stepping out of your own car.

Lipotso tse botsoang khafetsa¶

Mehloli e hlahlobiloe¶

• Occupational Safety and Health Administration (OSHA, United States): Electrical Power Generation, Transmission, and Distribution Standard (29 CFR 1910.269 and 29 CFR 1926 Subpart V): Step and Touch Potential Hazards and Minimum Approach Distances.
• Federal Emergency Management Agency (FEMA) and U.S. Fire Administration (USFA, United States): * Emergency Vehicle and Roadway Operations Around Downed Electrical Distribution and Transmission Lines*.
• Health and Safety Executive (HSE, United Kingdom): Avoiding Danger from Overhead Power Lines (Guidance Note GS6) and Electrical Safety in Vehicle Recovery and Emergency Response.
• National Fire Protection Association (NFPA, United States): Standard for Electrical Safety in the Workplace (NFPA 70E) and Alternative Fuel Vehicles (EV) Emergency Field Guide.
• Institute of Electrical and Electronics Engineers (IEEE, International): IEEE Guide for Safety in AC Substation Grounding (IEEE Std 80): Step and Touch Voltage Equations.
• Energy Networks Association (ENA, United Kingdom and Australia): Look Up Look Live: Downed Power Line Survival, Jump and Shuffle Protocols, and Heavy Machinery Clearance Guidelines.

Litataiso tse amanang¶

• What to do after a car crash
• Thuso ea pele ea ts'oaetso ea motlakase
• Maemo a tšohanyetso a koloi ea motlakase, e nyalisitsoeng le ea haedrojene
• Lithium-ion battery fires
• Ho khaoha ha motlakase lapeng
• Linomoro tsa maemo a tshohanyetso ho ea ka linaha