Build my own cabin - DIY projects

NEC 1999: Chapter 9 Table 8

 

Conductor Properties
Size Area Conductors DC Resistance at 75C (167F)
(AWG or kcmil) Cirular Mils Stranding Overall Copper Aluminum
Qty Diameter Diameter Area Uncoated Coated
in. in. in.² ohm/kFT 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 37 0.082 0.575 0.26 0.0515 0.0535 0.0847
300 37 0.09 0.63 0.312 0.0429 0.0446 0.0707
350 37 0.097 0.681 0.364 0.0367 0.0382 0.0605
400 37 0.104 0.728 0.416 0.0321 0.0331 0.0529
500 37 0.116 0.813 0.519 0.0258 0.0265 0.0424
600 61 0.099 0.893 0.626 0.0214 0.0223 0.0353
700 61 0.107 0.964 0.73 0.0184 0.0189 0.0303
750 61 0.111 0.998 0.782 0.0171 0.0176 0.0282
800 61 0.114 1.03 0.834 0.0161 0.0166 0.0265
900 61 0.122 1.094 0.94 0.0143 0.0147 0.0235
1000 61 0.128 1.152 1.042 0.0129 0.0132 0.0212
1250 91 0.117 1.289 1.305 0.0103 0.0106 0.0169
1500 91 0.128 1.412 1.566 0.00858 0.00883 0.0141
1750 127 0.117 1.526 1.829 0.00735 0.00756 0.0121
2000 127 0.126 1.632 2.092 0.00643 0.00662 0.0106

Back to Index of NEC Tables

Click the icons below to get our NEC® compliant Electrical Calc Elite or Electric Toolkit for Android and iOS.  The Electrical Calc Elite is designed to solve many of your common code-based electrical calculations like wire sizes, voltage drop, conduit sizing, etc.  The Electric Toolkit provides some basic electrical calculations, wiring diagrams (similar to those found on this website), and other electrical reference data. 

      Electrical Calc Elite    electric-toolkit-android