Attempting to trim palms near live wires can be fatal. Electricity can "arc" or jump from the line to your tools or body even without direct contact. Only OSHA-qualified professionals or utility-authorized crews should ever work near energized lines.
If you have palms on your property, safety should be your top priority. HDPalm Trees and Power Lines
Treat every overhead wire as energized and dangerous, including those that appear insulated. Palm Trees and Power Lines - CenterPoint Energy Attempting to trim palms near live wires can be fatal