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O.D. Outside
diameter.
Off-Center. Conductor displaced within
the cross-section of its insulation.
OFHC. Abbreviation for oxygen-free high
conductivity copper. It has no residual deoxidant, 99.95%
minimum copper content and an average annealed conductivity
of 101%.
Ohm. Unit of resistance such that a constant
current of one ampere produces a force of one volt.
Oil Aging. Cable aged in an accelerated
manner by placement in an oil bath and heated to a pre-set
temperature for a stated time.
OSHA. Abbreviation for Occupational Safety
and Health Act. Specifically the Williams- Steiger law
passed in 1970 covering all factors relating to safety
in places of employment.
Overall Diameter. Finished diameter over
wire and cable.
Overcoat. Individual strands of tin copper
stranded together and then covered with a tin coating.
Overlap. The amount the trailing edge
laps over the leading edge of a tape wrap.
Ozone. A highly active form of oxygen
produced by the passage of electric discharges or sparks
through air or oxygen.
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