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Nec Voltage Drop: copper
500 kcmil to 900 kcmil
NEC Chapter 9 Table 8 wire resistance and reactance data — DC resistance, AC resistance, and reactance for copper and aluminum conductors in PVC and steel conduit
| conductor material | conductor size | ac reactance ohm per kft pvc (ohm/kft) | ac reactance ohm per kft steel (ohm/kft) | ac resistance ohm per kft pvc (ohm/kft) | ac resistance ohm per kft steel (ohm/kft) | area cmil (cmil) | dc resistance ohm per kft uncoated (ohm/kft) | nec table | standard | stranding |
|---|---|---|---|---|---|---|---|---|---|---|
| copper | 500 kcmil | 0.039 | 0.048 | 0.027 | 0.029 | 500,000 | 0.0258 | chapter9 table8 | NEC Chapter 9 Table 8 | 37 |
| copper | 6 AWG | 0.051 | 0.064 | 0.49 | 0.49 | 26,240 | 0.491 | chapter9 table8 | NEC Chapter 9 Table 8 | 7 |
| copper | 600 kcmil | 0.039 | 0.048 | 0.023 | 0.025 | 600,000 | 0.0214 | chapter9 table8 | NEC Chapter 9 Table 8 | 61 |
| copper | 700 kcmil | — | — | — | — | 700,000 | 0.0184 | chapter9 table8 | NEC Chapter 9 Table 8 | 61 |
| copper | 750 kcmil | 0.038 | 0.048 | 0.019 | 0.021 | 750,000 | 0.0171 | chapter9 table8 | NEC Chapter 9 Table 8 | 61 |
| copper | 8 AWG | 0.052 | 0.065 | 0.78 | 0.78 | 16,510 | 0.764 | chapter9 table8 | NEC Chapter 9 Table 8 | solid |
| copper | 800 kcmil | — | — | — | — | 800,000 | 0.0161 | chapter9 table8 | NEC Chapter 9 Table 8 | 61 |
| copper | 900 kcmil | — | — | — | — | 900,000 | 0.0143 | chapter9 table8 | NEC Chapter 9 Table 8 | 61 |
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