30 CFR § 77.704-10
Tying into energized high-voltage surface circuits.
If the work of forming an additional circuit by tying into an energized
high-voltage surface line is performed from the ground, any person performing
such work must wear and employ all of the protective equipment and clothing
required under the provisions of §§77.704-5
. In addition, the insulated stick used by
such person must have been designed for such purpose and must be adequately
insulated and be maintained to protect such person from the voltage to which
he is exposed.