Abstract: A power line insulator clamp for clamping a power line to the top of a power line-holding insulator which comprises first and second clamping members pivotally hinged together by a hinge connection. The first clamping member has a first section configured to extend from the hinge connection across the top of the insulator so as to overlay a power line groove on the top of the insulator, and a second section configured to extend transversely of the first section for engaging a tie wire groove on the insulator. The second clamping member has a third section configured to extend from the hinge connection transversely of the first section for engaging the tie wire groove on the insulator. The hinge connection is located to one side of the clamp so as to not interfere with the insulator or a power line extended across the insulator. An actuator is coupled to the first and second clamping members for opening and closing the clamp.