D
dB see decibel
D. mil (0,001 inch) equal square
mil 0,78540. Denmarks
Elektriske Material Kontrol.
Conductor material capable easily carrying an
electrical conductivity.
Dielectric Strength The maximum voltage insulation
can withstand without rapture.
CSA Abbreviation for Canadian Standards Association,
a non-pro independent organization which operates
a listing service for electrical and electronic materials
and equipment. Copper and
steel welded together. Unit express
differences power level.
Colour Code system identifying different insulated
cores means colours, numbers, printing etc.
Cut off wavelength For singlemode ber, the wave-
length above which the ber exhibits singlemode operation.
The outer conductor shield commonly used to
prevent external radiation from affecting the current
owing the inner conductor.
Current rating The maximum continuous electrical
ow current recommended given wire given
situation, expressed amperes.
Cladding low-refractive index, glass plastic that
surrounds the core ber. This generally laid over the component or
under the screening, braiding etc. Also, leakage of
optical power from one optical conductor another. Cord small exible insulated
conductor group conductors, normally not larger
than AWG cores. Example: The decibel 10
times the common logarithm the power ratio.
Copolymer compound resulting from the
polymerization two different monomers.
Copperweld Copper covered steel wire. Abbreviation for direct current C), Electricity
that ows one direction only. Area circle 1/1000 inches in
a diameter.
Dielectric Breakdown The voltage required cause
an electrical failure breakthrough the insulation.1136
Circular Mil (CM) Used cross-sectional areas
of conductors.
Practical unit the ampere which represents the transfer
of one coulomb per second. Usually expressed a
voltage gradient, volts per mil.
Corona discharge due ionization air around a
conductor with potential gradient exceeding certain
critical value.
Coherent waves The phenomenon related the
existence correlation between the phases the
corresponding components two waves between the
values the phase given component one wave at
two instants time two points space.
GLOSSARY TERMS: CABLES AND WIRES
.) for their copper-clad
steel conductors. The trade name Flexo Wire
Division (Copperweld Steel Corp.
Undesired electrical currents conductors caused by
electromagnetic electrostatic coupling from other
conductors from external sources.
Dispersion general term for those phenomena that
cause broadening spreading light propagates
through optical ber.
Concentric lay Cable core composed central
core surrounded one more layers helically laid
insulated wires cores.
Drain Wire uninsulated wire used earth
connection. form polyethylen material whose
moleculars are more closely linked produce greater
balance physical and electrical properties.
Decibel (dB) One-tenth bel.
(XLPE compound)
Crosstalk Interference caused audio frequencies. The Canadian counterpart the
Underwriter‘s Laboratories.
Duct underground overhead tube conduit for
carrying electrical cables.
Cord Set Portable cords tted with wiring device
at one both ends. is
used express power gain ampli ers power loss in
passive circuits cables.
Cross-linked Setting the chemical links between the
molecular chains.
Control Cable multi-conductor cable made for
operation control signal circuits. high voltage electrical discharge that
attacks insulation.
Current Flow electricity measured amperes.
Crimp Act compressing connector barrel around
a cable order make electrical connection. Optical cladding promotes
total internal ection for the propagation light a
ber.
Core cables, component assembly compo-
nents over which other materials are applied, such as
additional components, shield, sheath, armour.
Cord small, exible insulated cable. wire combination wires not
insulated from one another, suitable for carrying electric
current.
&RD[LDO&DEOH cable consisting two cylindrical
conductors with common axis, separated dielectric.
DEMKO Approval agency Denmark. The three types are modal,
material, and waveguide
