A protective cover assembly for an electrical power distribution line conductor mounted on a horizontally oriented post insulator includes an insulator cover and a retaining pin. The insulator cover includes a cover body defining an insulator cavity configured to receive the insulator and a mounting bracket integral with the cover body. The mounting bracket defines a bracket slot having a bottom entry opening configured to receive the horizontally oriented insulator to couple the cover body to the insulator. The retaining pin is configured to close off the bottom entry opening to secure the insulator cover to the insulator. The cover body is formed of a flexible first material and the mounting bracket is formed of a second material that is more rigid than the first material.
