What does the lightning pattern on the telephone pole mean?

High voltage is dangerous, be careful of electric shock. Lightning patterns on power poles indicate high voltage danger, so be careful of electric shock. There will be a black lightning logo surrounded by a large black triangle in the logo, and there will be a slogan warning of electric shock below. Such signs are usually placed or hung in transformers, distribution rooms, high-voltage towers, distribution cabinets, telephone poles and other places to remind people to prevent electric shock.