Discussions

Power line in back alley is making a pretty loud noise.not a humming or cracking sound,more like i vibrating sound.you can feel the pole and ground vibrating around it. There is no transformer or equipment on this pole. Single line that looks like it is uninsulated.maybe a bit of frost on the line.Reason for concern?

Call Manitoba Hydro and explain what's happening and if necessary someone will be sent out to check. Put your mind at ease.

All our lines do that when it gets cold out, I don't think its anything to worry about.

The audible noise emitted from high-voltage lines is caused by the discharge of energy that occurs when the electrical field strength on the conductor surface is greater than the ''breakdown strength'' (the field intensity necessary to start a flow of electric current) of the air surrounding the conductor.  
In foul weather conditions, however, corona discharges can be produced by water droplets, fog and snow. So you may end up seeing a little bit of light. This is actually a pretty neat concept that can be concerning at first but is no safety hazard as it has been calculated to occur.  
 
Edited by tannerpidbo, 2018-01-25 08:35:15