Page 19 of 23 Guide for Installation and use of Southwire C
7
Overhead Conductor
wire cushion-grip suspension units. Brand names are AGS® and GSA® for PLP and AFL,
respectively.
Figure 23: PLP cushion-grip suspension (CGS)
Spooling and Training
The minimum diameter for spooling and storing C
7
conductor is 30 times the conductor
diameter. A limit of 20 times the conductor diameter should be maintained at all times during
temporary training and other handling requirements. Damage to the core will self-identify by
deformation in the aluminum shell. If a permanent “set”, birdcage, or kink is seen, it should be
evaluated for the possibility of damage to the composite core.
Conductor Oxidation
Exposure to air and moisture can cause oxidation to form on the conductor. Oxidation results
from a chemical reaction between oxygen and aluminum, yielding an oxide layer on the
conductor. While it is normal for oxidation to form, necessary steps should be taken to clean
the conductor of oxidation at hardware application areas. The conductor must be brushed in
these areas prior to installing hardware to ensure adequate metal-to-metal contact.
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