10ga for 30 Amp circuits
14ga for 15 Amp circuits
12ga for 20 Amp circuits
| Color-code for residential wire |
| Back to: gather materials for installation | Orange 10ga for 30 Amp circuits |
White 14ga for 15 Amp circuits |
Yellow 12ga for 20 Amp circuits |
Basic electric formula: Volts x Amps =
Watts ++  for safety,
wires can carry 80% of rated load |
 |
14 ga wire ++ rated for 120 Volts x
15 Amp = 1800 Watts x 80% = 1440 Watts 12 ga wire ++ rated for 120 Volts x 20 Amps = 2400 Watts x 80% = 1920 Watts 10 ga wire ++ rated for 240 Volts x 30 Amps = 7200 Watts x 80% = 5760 Watts Wire size chart with distances Electrical formulas |
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