# What Are High Tension Power Lines?

## What is the effect of high tension wires?

Although most physicists find it inconceivable that power-line electromagnetic fields could pose a hazard to health, dozens of epidemiologic studies have reported weak positive associations between proximity to high-voltage power lines and the risk of cancer..

## How do you know if you have high tension power lines?

If you see a large can that is a transformer and the wires connected to it will operate at higher voltage (I think 600 V). If it’s not connected to ANY house, and has big insulators it is a high voltage line.

## How far should a house be from high tension wires?

There should be a minimum horizontal distance of 14 m from the centre of tower for any construction which is located close to the 100 KV HT cables. There should be a minimum horizontal distance of 17.5 m from the centre of tower for any construction which is located close to the 220 KV HT cables.”

## How much voltage is in a power line?

Transmission lines carry high voltage electricity, typically at 345,000 volts, over long distances between the power generation plant and customers.

## Can you build a house under a power line?

Normally construction is never recommended beneath a live power line. But case specific approvals may be considered for small structures like road, drains,etc. The clear height of power line above the topmost level of the structure to be built.

## How tall are most power lines?

Power Lines Over Streets and Roadways With Commercial Traffic. For any driveways, alleys, roads, or streets likely to carry vehicles more than 8 feet in height, the guideline is for all power lines to be at least 18 feet above the ground measured at their lowest point.

## Is it normal for power lines to spark?

It’s important to remember that power lines don’t always arc, spark or catch ablaze, but they should always be treated with extreme caution. Whether they’re on fire running in-between utility poles or laying quietly on the ground, always stay at least 20 feet away from all wires and anything they’re touching.

## What is the voltage of high tension power lines?

You can see at the back several three-wire towers leaving the substation. Typical voltages for long distance transmission are in the range of 155,000 to 765,000 volts in order to reduce line losses. A typical maximum transmission distance is about 300 miles (483 km).

## Why do high tension power lines crackle?

It’s primarily the effect of the high voltage on the air surrounding the cable. … But if a sufficiently high voltage is applied across a small distance, electrons from the air molecules are stripped off and start to form a current. This in turn causes intense heating of the air – resulting in crackle and hiss.

## How do power lines affect property value?

Lower Property Values Proximity to power lines may lower a property’s value by as much as 30 percent, although that’s the higher end and usually refers to isolated incidents. … Still, it’s reasonable to assume that power line proximity has an overall negative effect on value of at least 10 percent, and possibly more.

## Is 11kv High Voltage?

Cable Specification: 11KV (Medium Voltage), 22KV (Medium Voltage), 33KV (High Voltage) manufactured to BS7835. … High Voltage Cable- 33KV is suitable for use in power networks, wind farms and can be surface mounted, installed underground and in cable ducting.

## Why are power lines so high?

Why High Voltage The primary reason that power is transmitted at high voltages is to increase efficiency. As electricity is transmitted over long distances, there are inherent energy losses along the way. High voltage transmission minimizes the amount of power lost as electricity flows from one location to the next.

## Is it normal for power lines to buzz?

Buzzing/humming sound of high power lines The sound that you hear from overhead power lines is due to a phenomenon called corona discharge. … In simple terms, it’s the noise that air (surrounding the power lines) makes as electricity jumps through it.

## Is it safe to live near high tension power lines?

Most scientists believe that exposure to the low-level EMFs near power lines is safe, but some scientists continue research to look for possible health risks associated with these fields. If there are any risks such as cancer associated with living near power lines, then it is clear that those risks are small.

## What is a safe distance from high tension power lines?

The strongest magnetic fields are usually emitted from high voltage transmission lines — the power lines on the big, tall metal towers. To be sure that you are reducing the exposure levels to 0.5 milligauss (mG) or less, a safety distance of 700 feet may be needed. It could be much less, but sometimes more.