Current flow has a significant impact on humans and cause destruction of the body. The most dangerous - is the path that passes through the brain and spinal cord, heart and lungs. Statistics show that injuries, the current path of the "right hand", "hand - the hand," are most common, way less "head - legs," "head - hands," "leg - the leg." Current path "leg - foot" is the least dangerous. More often? Such a path occurs when a person falls under the influence of so-called voltage step, i.e., between the points of the surface of the earth, at a distance from each other step.
If short-circuited to the ground a circuit - a random electrical connection to conductive parts directly to the ground or through the metal, it will spread along the ground electric current, called the current ground fault. The potential of the land as one moves away from the place of the closure - to change from maximum to zero, since the soil has a resistance to the current ground fault.
If a person gets into a zone of current spreading, then between his feet there will be a potential difference, which will cause current to flow along the path of "leg - the leg." The result of the impact of current can be cut leg muscles, and a person can fall. Drop will cause formation of a new, more dangerous passage of current through the circuit, the heart and lungs.
At a distance of 20 m from the circuit capacity can be assumed to be zero. |