Tables > Conductors > General > Conductor Properties

	Conductors DC Resistance at 75oC (167oF) Size AWG/kcmil Area Cir. Mils Stranding Overall Copper Aluminum Quantity Diam. In. Diam. In. Area In2 Uncoated ohm/kFT Coated ohm/kFT ohm/kFT 18 1620 1 - 0.04 0.001 7.77 8.08 12.8 18 1620 7 0.015 0.046 0.002 7.95 8.45 13.1 16 2580 1 - 0.051 0.002 4.89 5.08 8.05 16 2580 7 0.019 0.058 0.003 4.99 5.29 8.21 14 4110 1 - 0.064 0.003 3.07 3.19 5.06 14 4110 7 0.024 0.073 0.004 3.14 3.26 5.17 12 6530 1 - 0.081 0.005 1.93 2.01 3.18 12 6530 7 0.03 0.092 0.006 1.98 2.05 3.25 10 10380 1 - 0.102 0.008 1.21 1.26 2 10 10380 7 0.038 0.116 0.011 1.24 1.29 2.04 8 16510 1 - 0.128 0.013 0.764 0.786 1.26 8 16510 7 0.049 0.146 0.017 0.778 0.809 1.28 6 26240 7 0.061 0.184 0.027 0.491 0.51 0.808 4 41740 7 0.077 0.232 0.042 0.308 0.321 0.508 3 52620 7 0.087 0.26 0.053 0.245 0.254 0.403 2 66360 7 0.097 0.292 0.067 0.194 0.201 0.319 1 83690 19 0.066 0.332 0.087 0.154 0.16 0.253 1/0 105600 19 0.074 0.372 0.109 0.122 0.127 0.201 2/0 133100 19 0.084 0.418 0.137 0.0967 0.101 0.159 3/0 167800 19 0.094 0.47 0.173 0.0766 0.0797 0.126 4/0 211600 19 0.106 0.528 0.219 0.0608 0.0626 0.1 250 250000 37 0.082 0.575 0.26 0.0515 0.0535 0.0847 300 300000 37 0.09 0.63 0.312 0.0429 0.0446 0.0707 350 350000 37 0.097 0.681 0.364 0.0367 0.0382 0.0605 400 400000 37 0.104 0.728 0.416 0.0321 0.0331 0.0529 500 500000 37 0.116 0.813 0.519 0.0258 0.0265 0.0424 600 600000 61 0.099 0.893 0.626 0.0214 0.0223 0.0353 700 700000 61 0.107 0.964 0.73 0.0184 0.0189 0.0303 750 750000 61 0.111 0.998 0.782 0.0171 0.0176 0.0282 800 800000 61 0.114 1.03 0.834 0.0161 0.0166 0.0265 900 900000 61 0.122 1.094 0.94 0.0143 0.0147 0.0235 1000 1000000 61 0.128 1.152 1.042 0.0129 0.0132 0.0212 1250 1250000 91 0.117 1.289 1.305 0.0103 0.0106 0.0169 1500 1500000 91 0.128 1.412 1.566 0.00858 0.00883 0.0141 1750 1750000 127 0.117 1.526 1.829 0.00735 0.00756 0.0121 2000 2000000 127 0.126 1.632 2.092 0.00643 0.00662 0.0106
These resistance values are valid ONLY for the parameters as given. Using conductors having coated strands, different stranding type, and, especially, other temperatures changes the resistance. See NEC Chapter 9, Table 8.
See also Calculations Solving for Conductor Area in Three-wire Three-Phase Circuits Solving for Conductor Area in Two-wire Single-Phase Circuits Guides Conductor sizing and ampacities for insulated conductors rated 0-2000 Volts in raceway, cable, or direct buried Determining maximum conductor length to limit voltage drop Tables Grounding electrode conductors for alternating current systems Definitions Electromagnetic Induction Conductor