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| Term | Description |
|---|---|
| Extrusion | The process of continuously forcing both a plastic or elastomer and a conductor core through a die, thereby applying a continuous coating of insulation or jacket to the core or conductor |
| FAA | Federal Aeronautics Administration |
| Farad | A unit of electrical capacity |
| Fatigue Resistance | Resistance to metal crystallization which leads to conductors or wires breaking from flexing |
| FEP | Fluorinated Ethylene Propylene; a melt extrudable fluorocarbon resin |
| Field | Area through which electric and/or magnetic lines of force pass |
| Figure 8 Cable | An aerial cable configuration in which the conductors and the steel strand which support the cable are integrally jacketed; a cross section of the finished cable approximates the figure "eight" |
| Filled Cable | A telephone cable construction in which the cable core is filled with material that will prevent moisture from entering or passing through the cable |
| Filler | A material used in multi-conductor cables to occupy large interstices formed by the assembled conductors; an inert substance added to a compound to improve properties or decrease cost |
| Film | A thin plastic sheet |
| Fire Alarm and Signal Cable | CSA (Canadian Standards Association International) Standard C22.2 No. 208; Canadian Electrical Code, Part II |
| Fire Alarm Cable | UL Standard 1424 (CCN: HNIR); National Electrical Code (NEC) Article 760 of NFPA 70 |
| Fixture Wire | UL (Underwriter's Laboratories) Standard 66; National Electrical Code (NEC) Article 402 of NFPA 70 |
| Flame Resistant | The ability of a material to resist propagating a flame once the heat source is removed |
| Flame Retardance | Ability of a material to prevent the spread of combustion by a low rate of travel so the flame will not be conveyed |
| Flammability | The measurement of the material's ability to support combustion |
| Flammability Test | A test to determine the ability of a cable to resist ignition when placed near a source of heat or flame and to self-extinguish when removed from this source |
| Flat Cable | A cable with two smooth or corrugated but essentially flat surfaces |
| Flat Conductor | A wire having a rectangular cross section as opposed to round or square conductors |
| Flat Conductor Cable | A cable with a plurality of flat conductors |
| Flex Life | The measurement of the ability of a conductor or cable to withstand repeated bending |
| Flexibility | The ease with which a cable may be bent |
| Flexible | The quality of a cable or cable component which allows for bending under the influence of outside force, as opposed to limpness which is bending due to the cable's own weight |
| Flexible Cord | UL (Underwriter's Laboratories) Standard 62; National Electrical Code (NEC) Article 400 of NFPA 70 |
| Flexible Cords and Cables | CSA (Canadian Standards Association International) Standard C22.2 No. 49; Canadian Electrical Code, Part I |
| Fluorinated Ethylene-Propylene (FEP) | A compound that contains fluorine in molecular structure, used as both insulation and jacket with a maximum continuous operating temperature of 200°C and a maximum intermittent operating temperature of 232°C |
| Fluorocarbon | Compounds that contain fluorine in their molecular structure |
| Foamed (Cellular) PE | Polyethylene with air bubbles in the compound, resulting in better electrical properties and cost savings, used for insulation |
| Foamed Plastics | Insulations having a cellular structure |
| FPL | Designation of cable which meets the Vertical Tray flame test for Fire Protection Signaling Systems |
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