Abstract: The study shows that the majority of emergency shut-offs of 6-10 kV overhead power lines under the influence of wind and ice are due to dangerous rapprochement, clashing and wire breaks. Clashing and dangerous rapprochement of wires that cause emergency shut-offs of lines often occur in spans with disadjustment sag of the wires from 20-60%. The conducted experimental studies have shown that the distances between the wires with their pendulum oscillations decrease with increasing of disadjustment sag of the wires, wind speed and also with a decrease in the span length. At wind speeds in the range of 17.5-18.6 m/sec, the distance between the wires at the maximum rapprochement in 50 m span is 1.28-1.36 times less than in a of 100 m span. It is shown that the minimum distances between wires are observed at wind directions to the axis of the span within 40-90°. It has been experimentally established that the ice coating on the wires lead to a reduction in the distances between the wires by 26-34%. A new design of the spacer is proposed which prevents dangerous wires rapprochement during swaying under the influence of wind and low-frequency oscillations such as "Galloping".