IMPEDANCE, LOW - Generally, the area of 1 through 600 ohms.
IMPREGNATED CABLE - A cable with paper insulation in which the insulating properties of the paper tapes are improved by impregnating them with an insulating compound, such as oil.
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.
