How do birds sit safely on electric power lines?
This is possible because a bird only touches one line. If the bird were to touch another line or pole the electricity would travel through the bird, either to the ground or another wire. Answer To do any work, even to harm a person or other living thing, electricity has to flow FROM something TO something. So it could flow FROM a wire TO another wire, or FROM a wire TOO the ground, or FROM a cloud THROUGH a person TO the ground. When a bird sits on a wire there is great electrical POTENTIAL, but it doesn't go anywhere so the bird is perfectly safe since the electrical potential has no path through the bird. Answer Both above answers are correct, though, i have more to add. The electicity carries through to... usually nothing! Like the above answer, there is that potential though. If there were another wire which the bird was also touching, there would be problems and if it were to touch another bird, result is the same. Another interesting fact, I might add: If someone were to grab a power line with both hands at the EXACT same time, while feet were not on the ground and NOT, i repeat NOT touch anything else or put anthing on the power line, while already holding it, and then let go at EXACTLY the same time, without touching the ground first... That person would survive, no injuries! Answer I might add, while most birds perch on electrical wires perfectly safely, they do present some dangers. In particular, large birds such as eagles have wingspans wide enough that they occasionally brush two parallel wires with their wingtips, which completes the electrical circuit and allows electricity to run through the bird's body, killing them. This is a serious problem in certain desert areas where the birds use the electrical poles for nesting, due to limited other options.
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They are only on one wire at a time, so there is no circuit forcurrent. As long as they don't become grounded to something, ortouch two wires at the same time, they are fine. Generally,high-voltage wires are widely-separated to prevent arcing; thatalso helps prevent animals from touching two wires at once. Answer The resistance of the wire between the bird's feet is so low thatthe current passing through the conductor cannot create sufficientvoltage drop to harm the bird. Should part of the bird come intocontact with another line conductor, or an earthed conductor, thenit will be killed.. There is no ground. The electricity cant easily flow through them.
For current to flow, there must be a complete path from the wire to another wire, or to the ground. The bird is not "grounded" and there is no difference between potentials when it is sitting on one wire.
Their feet are made of keratin which is an insulator and so cannotbe electrocuted because it's not a conductor, like metal. Thisprotects birds and they use power lines as roosts, getting togetherwith other birds, marking territory and calling. Answer As interesting as the original answer is, it is wrong. Keratinmight be an insulator, but that has absolutely nothing to do withwhy a bird is not harmed when it perches on a power line! The reason is as follows. The resistance of the wire between the bird's feet is so low thatthe current passing through the conductor cannot create sufficientvoltage drop to harm the bird. Should part of the bird come intocontact with another line conductor, or an earthed conductor, thenit will be killed (despite having insulated legs!!!).
I've wondered that too but it's because they're not powerlines. So I'm not the same person that posted this but actually they have human like toes and they can bend them too stay on.... And their nails are already curved....
Because of resistance, the wires get warm and so when the birds rest on the wires their feet warm up.
Birds can sit on powerlines without being shocked because, in orderto be shocked, your body needs to be touching both the powerlineand the ground at the same time, so that there is a path forcurrent to flow. If birds sit on a powerline, they aren't touching the ground. Thismeans that they will not be shocked. Another explanation To be electrocuted you not only need a point at which theelectricity enters your body but also a point at which theelectricity exits your body. Because the birds are only touchingone wire there is no place for the electricity to exit, and thisprevents them from getting electrocuted. Answer The resistance of the wire between the bird's feet is so low thatthe current passing through the conductor cannot create sufficientvoltage drop to harm the bird. Should part of the bird come intocontact with another line conductor, or an earthed conductor, thenit will be killed..
As long as they're not touching more than one wire, or a wire and a metal object, they're safe. If they touch multiple wires or metal, the electricity uses their body to travel through, and it's bye-bye squirrel.
In the UK, the very large steel electricity pylons that you see stretching across the countryside carry around 400,000 Volts of electricity. There is a directly proportional relationship between Voltage and Current - Increase voltage = Decrease in current and vice-versa. The 400,000 volts in these primary power lines from the electricity generating stations is necessary in order to transmit the electricity over large distances without too much energy being lost as heat. If the voltage was lower then the current would be higher and much thicker cables would be needed to carry the energy without too much heat loss. The 400,000 volt lines feed into Sub-Stations which are basically huge transformers which step the voltage down to around 140,000 volts. The energy is then fed across smaller distances and along a number of routes to smaller sub-stations. The next sub-stations step the voltage down to around 66,000 and/or 33,000 volts which in turn gets transmitted to smaller sub-stations still. The next sub-stations step the voltage down to around 11,000 volts ... these are the smallest overhead power lines that you generally see running between the large wooden poles across the fields and around the outskirts of cities & towns. Many 11,000 volt lines drop down into under-ground cables once they reach heavily populated areas like towns & cities simply due to the impracticability of overhead lines close to buildings. The higher the voltage, the easier it is for the current to "jump" causing sparking or continuous arcing. 11,000 volts can quite easily spontaneously jump over a 1 metre gap in air and that distance can be increased dramatically if there is a high moisture content to the air. The final stage - The 11,000 volt lines arrive (usually underground in towns/cities - overhead in more rural areas) to their final dropping transformers or mini sub-stations where the energy gets dropped to it's final working voltage - 415 volts - 3-phase for commercial usage (Industrial estates etc') and 240 volts single phase - 240 volts for domestic use in your home. 120 volts is a common domestic level in many countries around the world and the voltages/step-down levels may vary accordingly but the principal is the same for the transmission of electricity across the board - very high voltages in the HT (High Tension) lines emanating from the generating stations - stepping down through a series of transforming sub-stations across the electricity grid until they reach the final LV (Low Voltage) lines which supply the end users. It is also interesting to note that there are many safety devices throughout the grid at all levels ranging from huge one-shot fuses which blow with the aid of a small explosive charge to compressed gas activated remotely operated switches to devices known as Re-Closers which will trip out in the event of a short-circuit but which will automatically try to re-connect after a pre-designated time (usually 2 to 3 minutes) - most of these Re-Closers will only attempt to re-establish supply 2 or 3 times before tripping out subject to a manual (or in some cases remotely activated) reset once the source of the problem has been located and rectified by engineers. Automatic Re-Closers can be useful in cases where for example, a small tree branch drops onto the overhead lines tripping the Re-Closer but bounces off causing only a temporary short-circuit. In this case, the Re-Closer will restore the supply to consumers very quickly without the expense of, or the need to wait for, engineers to come out to inspect the lines and restore the supply manually.
Unless the bird contacts two wires at the same time, the electric current will not pass through the bird.
Electricity travels through power lines because the wires form acomplete loop. Power lines can be overhead or underground and ifone is broken, the electricity cannot flow through it.
Because to get eletrocuted there has to be a circuit for the electricity to flow through. The bird sitting on one power line is like a dead-end street electrically. With nowhere for the electricity to flow to the bird is safe.. Then of course many power lines are insulated, and aren't particulary dangerous in the first place.
I took coils of roofing nails and uncoiled them to make a strand of nails and zip tied them,point up, to my cable and phone lines that are overhead. But would not recommend this for your homes overhead 240/120v electric line. IMO
Animals can sit on HIGH VOLTAGE Electrical lines. It does not give any current to animals or birds unless the circuit is complete. It is essentlal to complete the electrical circuits for making any current. When bird sit on the line / conductor the only legs of birds touched single line and it does not touch the other two conductors below upper line/conducotr , which does not make circiuit complete and birds / animals does not feel current.
They are social creatures and likely to hang out where everyone else does - like people! They tend to gather in flocks too. If it's near intersections my guess would be that's because it's between two clear fly zones, where there are not tall trees or buildings to get in their way as they fly. They like to stay relatively close to the ground for warmth, water, food, action...and wires are everywhere so they are used to hanging out there.
Birds will gather around the same electrical power line becausethey are social animals. This animals are often also seen flyingtogether.
For high voltage lines aluminum is used. Copper is actually a better conductor, but aluminum has the advantage of being lighter, as well as cheaper.
electric lines are coated with rubber, so they are not accually touching the direct line.
1. no lightning 2. wire is covered with a rubberish stuff. 3. neither do you 4. you're welcome.
Because the bird is not in contact with the earth, therfore thereis no circuit for the current to flow thru. Answer The resistance of the wire between the bird's feet is so low thatthe current passing through the conductor cannot create sufficientvoltage drop to harm the bird. Should part of the bird come intocontact with another line conductor, or an earthed conductor, thenit will be killed. Power lines are insulated. They only give shocks if the insulation is damaged.
You only get an electric shock if you are touching both the ground and the electric wire, (or close enough to both for the electricity to arc) Birds sat on electricity cables are not close enough to the ground for the electricity to arc, therefore they do not get shocked.
I have seen many types of birds sitting on power lines, but never a duck. That would be an outstanding balancing act considering they have webbed feet!
You're hearing the ionisation effect of the surrounding molecules in the magnetic field. You'll hear it worse when its raining.
Birds tend to line up with the prevailing wind. . They stand in the same direction in large groups on land.
because it is one of the highest places to perch and because they dont know what they are
It is EXTREMELY dangerous, but yes, people do steal electrical service- usually be bypassing the electric meter- and yes, it IS a crime to do that, and yes, people get arrested for it.
Remain clear of the wire that is hanging from an overhead line and get in touch with the distribution's utility company immediately. They have the proper safety equipment to deal with situations like this.
It gives them a good view of the surrounding area so they can spot food sources, and they are relatively safe from predators. Besides, all their friends do it so it's cool.
Birds tend to fly in groups. When one gets tired, it lands, and the others follow.
There is no path for current to flow from the wires to the ground,through the bird. It is possible that touching two wires couldcause current to flow, but the individual wires are usually farapart.
Because they are only touching one wire and they are not touching anything else which would provide a return path for the current back to the generator. The current is what shocks and kills, not the voltage.
Because they do not stand on the wire and the ground at the same time so there is no large potential difference. When humans are shocked it is electricity passing through them to the earth.
Generators supply electricity to transformers. Then the transformers increase the voltage to reduce voltage drop as the electricity travels over long distances. When the power gets to its destination, other transformers reduce the voltage back down to a useable level.
Yes, it is a power source, because it carries energy from the main lines directley into a house.
Power lines are insulated and as long as they don't touch the ground (or another object) they won't be electrocuted. Answer Most power lines are not, in fact, insulated because they are already surrounded by an insulating media -air. The reason that birds don't get electrocuted is because each foot is at the same potential and, for current to flow (it's the current which causes electrocution) through its body, each foot must be at a different potential. The bird is safe, providing another part of its body doesn't come in contact with one of the other conductors.
In Order For A Human Or A Bird To Get An Electric Shot, You Have To Be Touching Two Electrical Cables... So When You See A Bird On Wires Next, If You Look, They Sit On One Wire, Therefore They Don't Get An Electrical Shock. -Kjay0127
Because each foot is at the same potential, so no current can pass through their body.
Because it's not touching the ground To get an electric shock, there needs to be a difference in voltage between the parts of your body that are in contact with the electrical circuit. If both the bird's feet are on the same wire, they're at the same voltage - so no shock. But if one of them is on one wire, and pecks at a bird on a different wire, or at a bird that's standing on an earthed light fitting, then the current flow from one beak to the other will blow both the birds' tailfeathers off......
Birds sometimes do, but I think the wires are coated in rubber. plus the electricity only wants to go through them if they make a shorted path to the direction that it is heading. So if they do get electricuted, it is only a little, and so they dont die
MOST overhead powerlines are not covered in insulation- they may have a weatherproofing material on them, but it is not insulation. The birds are safe because they do not touch a wire AND the ground at the same time, and they only touch one wire at a time. The wires are held up by insulators, usually made of glass or ceramic material. If a bird touched two wires at once, or a wire and the ground at the same time, there would be a path for current to flow, and the bird would die. So will you if you do this. Do not EVER attempt to touch an overhead line with ANYTHING. Extreme danger.
The simple and correct answer is safety. They need to perch where there is the least danger from predators and power lines provide that. The reason you don't see it in trees is because the branches aren't long enough. Communal birds gather at dawn and dusk, and other times of day as they feel necessary, for social purposes and as lookouts, checking for predators, food sources, and so on. For simple social purposes they could gather anywhere, but for safety they choose to meet, even for purely social catch-up times, in the highest convenient places. Given a choice between trees of the same height which are bare, lightly-leafy, or heavily foliaged, they'll go for the perches in that order: bare branches will be their first preference. Power lines offer the perfect alternative to branches, even when bare trees of similar height are available. Power lines allow a brilliant all-round view without as many obstructions as trees present, with the added bonus that cats cannot climb concrete power poles, and even when the poles are timber they're still too high for the average cat - and even the most determined cat can't tiptoe along a power line. A building-top of the same height or higher than power lines offers a far less safe alternative, since they are ideal territory for predators, including cats and snakes. Next time you see a flock of birds up on a power line, have a look at them and work out why they've chosen that particular line rather than others nearby. Their favourite perch might give them the best view of their nesting area (at breeding time), or of the areas where they source their food. Crows might choose lines close to the nearest Macdonald's around school closing time, when kids might throw containers with leftover chips into the bins; swallows could be watching for a swarm of insects to start up; sparrows might have an eye on the local bakery for when crumbs are dumped or dropped. Insect-eating birds also find food flying past up there and can swoop after a passing bug without having to maneuver through branches. You'll notice some of these birds regularly flying off the wire to catch something in mid-air, and then come straight back to join the others. Power poles, as well as rooftops and high bare branches also offer good grooming areas. When birds are grooming one another, especially in breeding season when they've mates or chicks to groom (this is for bonding, as well as hygiene), they are vulnerable because so much of their attention is on the social pleasures and diligent work involved in grooming, for both birds. So these high, clear places mean predators can't easily sneak up on them while they're distracted. You will notice that even when most of the flock are somewhere else, there'll probably be a lookout here and there, up high, ready to sound the alarm if they spot something stalking their community members, or see some new berries have ripened up the road. Bird-lookouts benefit many species, not just the family of the duty sentry. All birds in an area know the calls of all the other birds, and act upon them. Crows (and, where I live, cockatoos) are among the most efficient guards, frequently on sentry duty much higher than smaller birds, and so very often sound the first warning, which is picked up by the other species. They also spot new food very quickly, and again the other birds listen out for the news. Other animals - rats and other small mammals - also are guided by the warning calls of birds. Many little creatures owe extensions of their short lives to a watchful crow up there on duty. So, your birds gathering up there on the power lines are part of one big neighbourhood community, just like we humans, getting together to swap news and gossip, watching out for one another, checking on the kids, finding good places to eat, and just generally going about their day-to-day business. It's not all just flying about having fun...
Why does a man dies when he touches electrical lines and where as a crow sitting on the electrical lines is safe why?
Simply because the man is 'grounded' through the pylon, or whatever he's standing on at the time - providing a low-resistance path to earth. If he were to grasp the line with both hands (like the crow sitting on the line) the electricity would take the shortest route of least resistance (ie continue through the cable instead of his body)
Stormrose says: "Power lines are encased in a rubber tube, much like any otherelectrical wires, such as the ones in a set of headphones, or alamp cord. The birds feet are not actually touching the live wires,so they aren't getting shocked. ITS PATH GrowtheTruth says: Absolutely ridiculous AND completely wrong! LOL! Sorry... The reason why birds don't get electrocuted is because electricityhas to flow from something to something. Birds onlysit on one wire with their feet touching it, which means that thereis no connectivity to the electrical flow, thus not completing theelectrical path. The electricity would have no way to travelthrough the bird. There is always the potential for a bird to be electrocuted,though. If one bird were to touch another bird or wire whileperched on the line or if a bigger bird (with a larger wing span)were to touch the wire with its wingtips, then the circuit would becompleted and would flow through their bodies, which would mostlikely kill them. Also, it can be said that, should someone grab a power line withboth hands at the exact (and I do mean exact ) same time,while their feet are not on the ground and not touching anything else, with no other body part touching the powerline (or anything else for that matter) while holding on, and thenthey were to let go at exactly the same time, withouttouching the ground first...then that person would survive with noinjuries! Apex - Birds sitting on a single power line don't get shockedbecause there is no path for current to flow to the ground
because there is no connection with the ground so it cannot pass from the electric to ground
Because you can only be electrocuted if you are touching 2 wires at once, creating a circuit. Birds are too small to span from one to the other, so they are usually safe. However sometimes possums can be killed from sitting on the wire, they have a long tail and a bigger body, making it easier to touch to at once, to come into contact with more than one is fatal.
Theoretically, human beings can sit safely on an individual overhead line conductor, providing no part of their body comes into contact with another conductor or the earth. In practise, of course, it's another story as it's highly improbable that anyone could approach a high-voltage line in the first place!
To get electrocuted you need to complete an electrical circuit.That takes two wires or a wire and an "earth". A bird on a wire isnot making a connection to a second wire or to the earth. Thereforeno electricity flows and they are perfectly safe.
Their feet are made for gripping on to objects like that along withtheir bodies so there good at balancing
Much has been written about the adverse effects of the electric or magnetic fields around power lines. None of these effects have been proven. People making the complaints claim to have the effects even when the lines are not powered and the effect is suspect.. However there are problems and hazards that are real:. Kite flying near power lines can lead to electrocution. . Taking off and flying aircraft, hot air balloons and ultralight aircraft near power lines can lead to electrocution . Raising crane arms into power lines can lead to electrocution . Some folks have climbed power towers, drunk beer and then urinated on the lines. This leads to a spectacular electrocution. . It is not safe to be living under or close to high voltage electric transmission lines
Actually if we were to sit on a power line and not touch anything else like the birds do we would not get electrocuted.The current a flow of electrons,flows along a path of least resistance the electrons want to get to where they are going in the easiest possible way. Electricity flows from one voltage to another value of voltage. For the birds, the power lines have the same voltage -- so the birds are safe. Don't approach power lines, because humans come from the ground, which is a sink for the current.
Birds are not good conductors of electricity. Their cells and tissues do not offer electrons an easier route than the copper wire they are already travelling along