Anti-Rotational Device Explanation and Common Objections
A white paper discusses using Anti-rotational devices (ARD) in optical ground wire (OPGW) installations.
The use of an Anti-Rotational Device (ARD), also referred to in the field as a “gator” or “monkey tail”, is common for many Optical Ground Wire (OPGW) installations which differs from installation of traditional conductor or shield wire. The recommendation to use an ARD is to allow the cable to be installed without introducing torsion stress. The ARD creates a moment of inertia that prevents the cable from rotating as it travels over the pulling blocks. It is commonly installed in front of the OPGW being pulled in.