The following table will help calculate the length and gauge of wire required to maintain specified amperage.
| AWG | Resistance Per Foot |
|---|---|
| 18 | 0.00651 |
| 16 | 0.00402 |
| 14 | 0.00253 |
| 12 | 0.00159 |
| 10 | 0.001 |
| 8 | 0.00063 |
| 6 | 0.0004 |
| 4 | 0.00025 |
| 2 | 0.00016 |
Voltage Drop = Amps x Resistance x Feet
Example: 150 feet of 14 gauge wire on a 20 amp circuit breaker
150 x 0.00253 x 20 = 7.59 Volt Drop
Therefore, one piece of equipment can operate up to 12 amps.
