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Glossary/Dictionary

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Term Description
Magnetic FieldThe region within which a body or current experiences magnetic forces
Magnetic FluxThe rate of flow of magnetic energy across or through a surface (real or imaginary).
Magnetic NoiseChanges in the current level within a cable caused by an external magnetic field
MCMOne thousand circular Mils
MegaradA unit for measuring radiation dosage. Equal to one million rads.
MegohmOne million ohms
MemberA group of insulated wires to be cabled with other stranded groups into multiple-membered cable
MessengerThe linear supporting member, usually a high strength steel wire, used as the supporting element of a suspended aerial cable. The messenger may be an integral part of the cable, or exterior to it.
MhoThe unit of conductivity. The reciprocal of an ohm.
MHzMegahertz (one million cycles per second).
MicrophonicsNoise in a system caused by mechanical vibrations
MicrowaveA short (usually less than 30cm.) electrical wave
MilA unit used in measuring diameter of a wire or thickness of insulation over a conductor. One one thousandth of an inch (.001").
Mis-MatchA termination having a different impedance than that for which a circuit or cable is designed
Modules of ElasticityThe ratio of stress to strain in an elastic material
Moisture AbsorptionThe amount of moisture, in percentage, that a material will absorb under special conditions
Moisture ResistanceThe ability of a material to resist absorbing moisture from the air or when immersed in water
MonomerThe basic chemical unit used in building a polymer
MPDesignation of multi-purpose cable that meets Vertical Tray flame test
MPPDesignation of multi-purpose cable that meets Steiner Tunnel test
MPRDesignation of multi-purpose cable that meets Riser flame test
MTWThermoplastic insulated machine tool wire
MulticonductorMore than one conductor within a single cable complex
Mutual CapacitanceCapacitance between two conductors when all other conductors including ground are connected together and then regarded as an ignored ground
Mutual InductanceThe ratio of voltage induced in one conductor to the time rate of current change in the separate conductor causing this induction
MylarDuPont trademark for polyester material used in the form of a tape