Electrical conductors installed aboveground and having a voltage differential in excess of 600 volts between any pair of conductors or between any conductor and ground. In the case of alternating current, the voltage shall be measured in R.M.S. value. All high-voltage lines shall be considered as energized high-voltage lines until assurance has been given that they are otherwise by qualified representatives of the owners or persons in charge of such lines.

As defined in Labor Law, section 202-h, dangerous proximity shall be the distance within 10 feet of high-voltage lines, or within such greater distances as are set forth in the 1990 edition of the regulations of the United States Occupational Safety and Health Administration (29 CFR parts 1910 and 1926), the New York Industrial Code (12 NYCRR Part 23) and the National Electrical Safety Code, 1990 edition, published by the American National Standards Institute, 11 West 42nd Street, New York, NY 10036.

The greatest effective difference of potential between any two conductors of the circuit concerned.

The operation, erection, transportation, handling, or storage of any tools, machinery, equipment, supplies, material or apparatus, or the moving of any building, if in the course of such operation, erection, transportation, handling, storage or moving of such objects it is possible to come within dangerous proximity of a high-voltage line.