IMPULSE STRENGTH  - The voltage breakdown of insulation under voltage surges on the order of microseconds in duration.
IMSASA  - Abbreviation for International Municipal Signal Association, specification for fire alarm cable.
in  - Abbreviation for inches.
INCL  - Abbreviation for including.
INDEX OF REFRACTION  - See refractive index.
INDIV  - Abbreviation for individual.
INDUCED CURRENT  - An electric current that flows in a conductor as a result of a changing magnetic flux density, in which lines of magnetic flux intersect with the conductor.
INDUCTANCE  - The property of a circuit or circuit element that opposes a change in current flow, thus causing current changes to lag behind voltage changes. It is measured in henrys. Symbol L.
INDUCTION  - The phenomenon of a voltage, magnetic field, or electrostatic charge being produced in an object by lines of force from the source of such fields.
INDUCTIVE COUPLILING  - Cross talk resulting from the electromagnetic field of one conductor on another.
INSERTION LOSS  - The total optical power loss caused by the insertion of an optical component such as a connector, splice, or coupler.
INSULATION  - That portion which is relied upon in a cable to segregate and protect the conductor from the other conductors, conducting parts, or from ground.