Transcription of NEC 310-16 Allowable Ampacities of Insulated Conductors B
1 2002 Thomas & Betts Corporation. Specifications are subject to change without notice. NEC 310-16 Allowable Ampacities of Insulated ConductorsTemperature Rating of conductor (See Table )60 C (140 F)75 C (167 F)90 C (194 F)60 C (140 F)75 C (167 F)90 C (194 F)Types TBS, SA, SIS,FEP, FEPB, MI, RHH,Types TBS, SA, SIS,RHW-2, THHN,THHN, THHW,Types RHW,THHW, THW-2,Types RHW,THW-2, THWN-2,THHW, THW,THWN-2, USE-2, XHH,THHW, THW,RHH, RHW-2, USE-2,Types TW,THWN, XHHW,XHHW, XHHW-2,Types TW,THWN, XHHW,XHH, XHHW,UFUSE, ZWZW-2 UFUSEXHHW-2, ZW-2 Size AWG or kcmilCOPPERALUMINUM OR COPPER-CLAD ALUMINUMSize AWG or kcmil18 14 16 18 14*202025 12*25253020202512*10*30354025303510*8405 0553040458655657540506064708595556575438 5100110657585329511513075901002111013015 08510011511/01251501701001201351/02/0145 1751951151351502/03/01652002251301551753 /04/01952302601501802054/025021525529017 0205230250300240285320190230255300350260 3103502102502803504002803353802252703054 0050032038043026031035050060035542047528 5340385600700385460520310375420700750400 4755353203854357508004104905553303954508 0090043552058535542548090010004555456153 7544550010001250495590665405485545125015 0052062570543552058515001750545650735455 545615175020005606657504705606302000 CORRECTION FACTORSA mbientFor ambient temperatures other than 30 C (86 F), AmbientTemp.
2 ( C)multiply the Allowable Ampacities shown above by the appropriate factor shown ( F)21 7726 8631 9536 10441 11346 12251 13156 60 14061 70 15871 80 176*See (D).Article 310 Conductors for General WiringTable Allowable Ampacities of Insulated Conductors Rated 0 Through 2000 Volts, 60 C Through 90 C (140 F Through 194 F), Not More ThanThree Current-Carrying Conductors in Raceway, Cable, or Earth (Directly Buried), Based on Ambient Temperature of 30 C (86 F)Reprinted with permission from NFPA 70-1999, National Electrical Code , Copyright 1998, National Fire Protection Association, Quincy, MA 02269. Thisreprinted material is not the complete and official position of the NFPA on the referenced subject, which is represented only by the standard in its Electrical Code and NEC are registered trademarks of the National Fire Protection Association, Quincy, OCAL 3/5 3/13/03 5:02 PM Page 35
