When you work in the vicinity of gas pipelines or electrical installations you must know and follow the relevant safety rules.
The safety rules for electrical installations are found in the Heavy Current Executive Order, section 5A. Here you will find instructions on safe distances from towers and poles, cables and overhead lines at various voltages levels.
The safety rules for gas pipelines are described in the pamphlet ‘Beware of gas pipes’ that contains the technical regulations for gas.