Tables > Conductors > Dimensions and Sizes > Insulated, Fixture Wires

	Type Size Approx. Area Sq. In. RHF-2, FFH-2 18 0.0145 RHF-2, FFH-2 16 0.0172 RH 14 0.0209 RH 12 0.026 RHH, RHW, RHW-2 14 0.0293 RHH, RHW, RHW-2 12 0.0353 RHH, RHW, RHW-2 10 0.0437 RHH, RHW, RHW-2 8 0.0835 RHH, RHW, RHW-2 6 0.1041 RHH, RHW, RHW-2 4 0.1333 RHH, RHW, RHW-2 3 0.1521 RHH, RHW, RHW-2 2 0.175 RHH, RHW, RHW-2 1 0.266 RHH, RHW, RHW-2 1/0 0.3039 RHH, RHW, RHW-2 2/0 0.3505 RHH, RHW, RHW-2 3/0 0.4072 RHH, RHW, RHW-2 4/0 0.4754 RHH, RHW, RHW-2 250 0.6291 RHH, RHW, RHW-2 300 0.7088 RHH, RHW, RHW-2 350 0.787 RHH, RHW, RHW-2 400 0.8626 RHH, RHW, RHW-2 500 1.0082 RHH, RHW, RHW-2 600 1.2135 RHH, RHW, RHW-2 700 1.3561 RHH, RHW, RHW-2 750 1.4272 RHH, RHW, RHW-2 800 1.4957 RHH, RHW, RHW-2 900 1.6377 RHH, RHW, RHW-2 1000 1.7719 RHH, RHW, RHW-2 1250 2.3479 RHH, RHW, RHW-2 1500 2.6938 RHH, RHW, RHW-2 1750 3.0357 RHH, RHW, RHW-2 2000 3.3719 SF-2, SFF-2 18 0.0115 SF-2, SFF-2 16 0.0139 SF-2, SFF-2 14 0.0172 SF-1, SFF-1 18 0.0065 RFH-1, XF, XFF 18 0.008 TF, TFF, XF, XFF 16 0.0109 TW, XF, XFF, THHW, THW, THW-2 14 0.0139 TW, THHW, THW, THW-2 12 0.0181 TW, THHW, THW, THW-2 10 0.0243 TW, THHW, THW, THW-2 8 0.0437 RHH*, RHW*, RHW-2* 14 0.0209 RHH*, RHW*, RHW-2*, XF, XFF 12 0.026 RHH*, RHW*, RHW-2*, XF, XFF 10 0.0333 RHH*, RHW*, RHW-2* 8 0.0556 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 6 .0726 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 4 .0973 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 3 0.1134 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 2 0.1333 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 1 0.1901 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 1/0 0.2223 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 2/0 0.2624 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 3/0 0.3117 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 4/0 0.3718 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 250 0.4596 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 300 0.5281 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 350 0.5958 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 400 0.6619 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 500 0.7901 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 600 0.9729 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 700 1.101 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 750 1.1652 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 800 1.2272 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 900 1.3561 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 1000 1.4784 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 1250 1.8602 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 1500 2.1695 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 1750 2.4773 TW, THW, THHW, THW-2, RHH*, RHW*, RHW-2* 2000 2.7818 TFN, TFFN 18 0.0055 TFN, TFFN 16 0.0072 THHN, THWN, THWN-2 14 0.0097 THHN, THWN, THWN-2 12 0.0133 THHN, THWN, THWN-2 10 0.0211 THHN, THWN, THWN-2 8 0.0366 THHN, THWN, THWN-2 6 0.0507 THHN, THWN, THWN-2 4 0.0824 THHN, THWN, THWN-2 3 0.0973 THHN, THWN, THWN-2 2 0.1158 THHN, THWN, THWN-2 1 0.1562 THHN, THWN, THWN-2 1/0 0.1855 THHN, THWN, THWN-2 2/0 0.2223 THHN, THWN, THWN-2 3/0 0.2679 THHN, THWN, THWN-2 4/0 0.3237 THHN, THWN, THWN-2 250 0.397 THHN, THWN, THWN-2 300 0.4608 THHN, THWN, THWN-2 350 0.5242 THHN, THWN, THWN-2 400 0.5863 THHN, THWN, THWN-2 500 0.7073 THHN, THWN, THWN-2 600 0.8676 THHN, THWN, THWN-2 700 0.9887 THHN, THWN, THWN-2 750 1.0496 THHN, THWN, THWN-2 800 1.1085 THHN, THWN, THWN-2 900 1.12311 THHN, THWN, THWN-2 1000 1.3478 PF, PGFF, PGF, PFF, PTF, PAF, PTFF, PAFF 18 0.0058 PF, PGFF, PGF, PFF, PTF, PAF, PTFF, PAFF 16 0.0075 PF, PGFF, PGF, PFF, PTF, PAF, PTFF, PAFF, TFE, FEP, PFA, FEPB, PFAH 14 0.01 TFE, FEP, PFA, FEPB, PFAH 12 0.0137 TFE, FEP, PFA, FEPB, PFAH 10 0.0191 TFE, FEP, PFA, FEPB, PFAH 8 0.0333 TFE, FEP, PFA, FEPB, PFAH 6 0.0468 TFE, FEP, PFA, FEPB, PFAH 4 0.0670 TFE, FEP, PFA, FEPB, PFAH 3 0.0804 TFE, FEP, PFA, FEPB, PFAH 2 0.0973 TFE, PFAH 1 0.1399 TFE, PFA, PFAH, Z 1/0 0.1676 TFE, PFA, PFAH, Z 2/0 0.2027 TFE, PFA, PFAH, Z 3/0 0.2463 TFE, PFA, PFAH, Z 4/0 0.3 ZF, ZFF 18 0.0045 ZF, ZFF 16 0.0061 Z, ZF, ZFF 14 0.0083 Z 12 0.0117 Z 10 0.0191 Z 8 0.0302 Z 6 0.043 Z 4 0.0625 Z 3 0.0855 Z 2 0.1029 Z 1 0.1269 XHHW, ZW, XHHW-2, XHH 14 0.0139 XHHW, ZW, XHHW-2, XHH 12 0.0181 XHHW, ZW, XHHW-2, XHH 10 0.0243 XHHW, ZW, XHHW-2, XHH 8 0.0437 XHHW, ZW, XHHW-2, XHH 6 0.059 XHHW, ZW, XHHW-2, XHH 4 0.0814 XHHW, ZW, XHHW-2, XHH 3 0.0962 XHHW, ZW, XHHW-2, XHH 2 0.1146 XHHW, XHHW-2, XHH 1 0.1534 XHHW, XHHW-2, XHH 1/0 0.1825 XHHW, XHHW-2, XHH 2/0 0.219 XHHW, XHHW-2, XHH 3/0 0.2642 XHHW, XHHW-2, XHH 4/0 0.3197 XHHW, XHHW-2, XHH 250 0.3904 XHHW, XHHW-2, XHH 300 0.4536 XHHW, XHHW-2, XHH 350 0.5166 XHHW, XHHW-2, XHH 400 0.5782 XHHW, XHHW-2, XHH 500 0.6984 XHHW, XHHW-2, XHH 600 0.8709 XHHW, XHHW-2, XHH 700 0.9923 XHHW, XHHW-2, XHH 750 1.0532 XHHW, XHHW-2, XHH 800 1.1122 XHHW, XHHW-2, XHH 900 1.2351 XHHW, XHHW-2, XHH 1000 1.3519 XHHW, XHHW-2, XHH 1250 1.718 XHHW, XHHW-2, XHH 1500 2.0157 XHHW, XHHW-2, XHH 1750 2.3127 XHHW, XHHW-2, XHH 2000 2.6073 KF-2, KFF-2 18 0.0031 KF-2, KFF-2 16 0.0044 KF-2, KFF-2 14 0.0064 KF-2, KFF-2 12 0.0093 KF-2, KFF-2 10 0.0139 KF-1, KFF-1 18 0.0026 KF-1, KFF-1 16 0.0037 KF-1, KFF-1 14 0.0055 KF-1, KFF-1 12 0.0083 KF-1, KFF-1 10 0.0127
*Types RHH, RHW, and RHW-2 without outer covering Reprinted with permission from NFPA 70-1999, the National Electrical Code®, Copyright 1998, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the referenced subject which is represented only by the Standard in its entirety.
See also Calculations Solving for Conductor Area in Three-wire Three-Phase Circuits Solving for Voltage Drop in Three-wire Three-Phase Circuits Guides Conductor sizing and ampacities for insulated conductors rated 0-2000 Volts in raceway, cable, or direct buried Parallel Conductor sizing and ampacities for insulated conductors rated 0-2000 Volts in raceway, cable, or direct buried Tables Nominal dimensions and area for compact aluminum building wire Correction Factors for Ambient Temperature of Allowable Ampacities of Insulated Conductors Definitions Mush Coil Specific Resistance