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Type TFFN (stranded copper) is flame-retardant PVC-insulated with nylon jacketing that has excellent resistance to abrasion, chemicals, gas and oil.

 

Republic Wire’s NM-B (nonmetallic-sheathed cable) may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90°C with ampacity limited to 60°C conductors as specified in the 2011 NEC.

NM-B is primarily used in residential wiring as branch circuits for switches, outlets and other loads. NM-B may run in air voids of masonry block or tile walls where locations are not wet or damp. NM-B voltage rating is 600 volts.

RWU90 copper conductors are suitable for use in conduit and raceways installed underground in conduit, in wet locations, and where condensation and moisture accumulations within the conduit do not exceed 90o. Conductor temperatures shall not exceed 90oC in wet or dry locations. Voltage rating for RWU90 conductors are 1000 volts. Insulation rated for use to -40oC.